FOLIA BIOLOGICA ET GEOLOGICA 52/1-2, 99–110, LJUBLJANA 2011 A NEW LOCALITY OF CHOUARDIA LITARDIEREI = SCILLA LITARDIEREI ON A DRY SUBMEDITERRANEAN MEADOW AT PLANINA NEAR POSTOJNA NOVO NAHAJALIŠČE VRSTE CHOUARDIA LITARDIEREI = SCILLA LITARDIEREI NA SUHEM SUBMEDITERANSKEM TRAVNIKU PRI PLANINI PRI POSTOJNI Andrej SELIŠKAR 1 & Igor DAKSKOBLER 2 ABSTRACT UDC 582.573(497.4Planina) The article describes a new locality of the Illyrian species Chouardia litardierei on a dry meadow undergoing spontane- ous afforestation (Saturejo liburnicae-Seslerietum calcariae Dakskobler 2006 nom. prov.) at Planina near Postojna, in a new quadrant of the Central-European f lora mapping (0151/3). The species already has known localities near this settlement, but on entirely different sites on occasionally flooded wet meadows of the karst polje Planinsko polje (0151/4). Even though it normally grows on wet meadows and is classified among the character species of the alliance Molinio-Hordeion secalini, it has been known to occur on dry sites also in other parts of its distribution area. Its growth on a site such as the one near Planina indicates that the species has wider ecologi- cal amplitude than has been attributed to it so far. Key words: Chouardia litardierei (=Scilla litardierei), Sa- turejo liburnicae-Seslerietum calcariae, Scorzonero-Chrysopo- gonetalia = Scorzoneretalia villosae, Planina near Postojna, Slovenia IZVLEČEK UDK 582.573(497.4Planina) V članku opisujemo novo nahajališče ilirske vrste Chouardia litardierei na suhem zaraščajočem travniku ( Saturejo liburni- cae-Seslerietum calcariae Dakskob l er 2006 n o m. p r o v . ) p ri Planini pri Postojni, v novem kvadrantu srednjeevropskega kartiranja flore (0151/3). Ta vrsta ima pri tem kraju že znana nahajališča, vendar na povsem drugačnih rastiščih, na obča- sno poplavljenih mokrotnih travnikih kraškega Planinskega polja (0151/4). Čeprav navadno uspeva na vlažnih travnikih in jo uvrščajo med značilnice zveze Molinio-Hordeion secalini, je tudi v drugih delih areala že znano pojavljanje na suhih rasti- ščih. Njeno uspevanje na takšnem rastišču pri Planini kaže, da ima širšo ekološko amplitudo, kot smo ji jo pripisovali do zdaj. Ključne besede: Chouardia litardierei (=Scilla litardierei), Saturejo liburnicae-Seslerietum calcariae, Scorzonero-Chryso- pogonetalia = Scorzoneretalia villosae, Planina pri Postojni, Slovenija 1 Institute of Biology, Scientific Research Centre of the Slovenian Academy of Sciences and Arts, Novi trg 2, SI-1000 Ljubljana, Slovenia, E-mail: ase@siol.com 2 Institute of Biology, Scientific Research Centre of the Slovenian Academy of Sciences and Arts, Regional unit Tolmin, Brunov drevored 13, SI-5220 Tolmin, Slovenia, E-mail: Igor.Dakskobler@zrc-sazu.si COBISS 1.01 100 ANDREJ SELIŠKAR & IGOR DAKSKOBLER: A NEW LOCALITY OF CHOUARDIA LITARDIEREI = SCILLA LITARDIEREI ... FOLIA BIOLOGICA ET GEOLOGICA 52/1-2 – 2011 1 INTRODUCTION The Illyrian species Chouardia litardierei = Scilla litardi- erei is a notable Slovenian plant (T. Wraber 1990: 216), as well as vulnerable (T . W raber & Sk oberne 1 989: 293–294, Red list 2002: 8908) and protected (Skoberne 2007: 84). It has only been known in Slovenia since 1977 (Petkovšek & Seliškar 1977, 1978) from a relatively limited area on periodically flooded Planinsko polje. This is also its northernmost locality in the entire distri- bution area that extends along the Dinaric mountains to Montenegro (Gaži-Baskova 1962, Petkovšek & Seliškar 1977: 108–109, Praprotnik 1987: 41–42, T. Wraber, ibid.); its occurrence in Albania remains un- certain (Speta 1998: 98). The finders thoroughly stu died its site and distribution in this remarkable karst polje (Petkovšek & Seliškar, ibid., also 1979). They found it only in a meadow community characteristic for periodi- cally flooded karst poljes and described by Ilijanić (1979) as the association Deschampsio-Plantaginetum altissimae from the alliance Molinion. Its occurrence on already known localities was confirmed during our mapping of non-forest habitats in Planinsko polje in 2010. It was found also in the wider surroundings on new marshy sites, in populations of several thousand in- dividuals. Even elsewhere in its distribution area it usu- ally thrives on wet meadows of karst poljes, sporadically also on moist and slightly brackish sites. It is considered to be a character species of the alliance of moist Sub- mediterranean meadows Molinio-Hordeion secalini Horvatić (1934) 1958. In Croatia it grows in several com- munities from this alliance (Trinajstić 2008: 68–70). On 7 June 2010, while mapping the habitat types in Planinsko polje and its vicinity, we found Chouardia li- tardierei in entirely different site conditions, on a dry meadow on the fringes of an urban settlement of Plani- na, in the vicinity of a large, abandoned sandpit (Figure 1), with some 20 flowering specimens. In the southern p a r t o f t h i s s p e c i e s ’ d i s t r i b u t i o n a r e a ( B i o k o v o i n C r o a t i a , Herzegovina, Montenegro) Šilić (1991) described a si- milar species Scilla lakusicii = Chouardia lakusicii, which, however, thrives on dry sites with shallow soil (Šilić 1990, Šilić & Šolić 2002). Our specimens there- fore had to be compared with the specimens of the new species (Figure 3). For this reason and because the new Figure 1: New locality of Chouardia litardierei at Planina near Postojna (Source: Basic topographic map of the RS : 5000, GURS – Surveying and Mapping Authority of the Republic of Slovenia) Slika 1: Novo nahajališče vrste Chouardia litardierei pri Planini pri Postojni (Vir: Temeljna topografska karta RS 1: 5000, GURS) locality is in the new quadrant of the Central-European flora mapping (Figure 2), we continue by describing the loca lity and discussing the reasons for the occurrence of a character species of moist meadows on a dry Submedi- terranean grassland. 2 METHODS The flora and vegetation in Planinsko polje and its sur- roundings were studied according to the established central-European methods (Braun-Blanquet 1964, Ehrendorfer & Hamann 1965). The phytosociologi- cal relevé was entered into the FloVegSi database (T. Seliškar, Vreš & A. Seliškar 2003). The same applica- 101 ANDREJ SELIŠKAR & IGOR DAKSKOBLER: A NEW LOCALITY OF CHOUARDIA LITARDIEREI = SCILLA LITARDIEREI ... FOLIA BIOLOGICA ET GEOLOGICA 52/1-2 – 2011 tion was used to make a distribution map (Figure 2). The nomenclature source for the names of vascular plants is the Mala flora Slovenije (Martinčič et al. 2007) except for Chouardia litardierei (Breistr.) Speta, where we fol- low the nomenclature established by Speta (1998). The nomenclature source for the names of syntaxa is Seliškar (1996). 3 RESULTS 0151/3 (UTM 33TVL47): Slovenia, Inner Carniola (Notranjska), Planina near Postojna, Na Lepeni, to the south of the large sandpit at the foothills of the hill Hrbce, on the northwestern edge of the settlement, gen- tle slope above the road, dry grassland that is no longer mowed and is being overgrown from the edge mainly by red pine, thermophilous deciduous trees and hazel, Sa- turejo liburnicae-Seslerietum calcariae nom. prov. (Table 1, Figures 5 and 6). About 20 flowering specimens (total number with steril plants was 37). Leg. & det. I. Dak- skobler & A. Seliškar, 7. 6. 2010, 520 m a.s.l., Herbarium LJS 11605 (Herbarium of the Scientific Research Centre of the Slovenian Academy of Sciences and Arts). Chouardia litardierei was recorded in the meadow community presented in Table 1. A total of 65 species were determined on this meadow, only 7 of which are the same as those in the meadow where this species grows in Planinsko polje and which was surveyed by Petkovšek & Seliškar (1977: 110–111) who determined 75 species on that meadow. The species common to both relevés are Chouardia litardierei, Galium boreale, Pimp- inella saxifraga, Filipendula vulgaris, Linum catharti- cum, Festuca rubra and Lotus corniculatus. Floristic similarity according to Sørensen (1948) is only 10 %, so these are obviously two entirely different meadow com- munities. The abandoned meadow near the sandpit is notably dominated by the species of dry and semi-dry grasslands from the class Festuco-Brometea (63 %), which include some species diagnostic for the Submediterrane- an-Illyrian order Scorzonero-Chrysopogonetalia = Scor- zoneretalia villosae (e.g. Knautia illyrica, Plantago holos- teum, Chrysopogon gryllus, Sanguisorba muricata and Centaurea scabiosa subsp. fritschii) and some species di- agnostic for dry Submediterranean grasslands from the alliance Saturejion subspicatae (e.g. Satureja subspicata subsp. liburnica, Satureja montana subsp. variegata and Euphrasia illyrica). Even in terms of the presence of other species that are differential for the Mediterranean dry grasslands in the wider sense (e.g. Ruta divaricata, Carex humilis, Teucrium montanum, Globularia cordifolia, Do- rycnium germanicum, Festuca rupicola, Veronica barrel- ieri) the recorded meadow could be classified into the association Carici humilis-Centaureetum rupestris; how- ever, the dominant species in our relevé is taxon Sesleria caerulea subsp. calcaria. Petkovšek & Seliškar (1982: 77) mapped the dry grasslands in the vicinity of Planina as the association Carici humilis-Seslerietum juncifoliae Horvat 1930, but added in the footnotes that the research area was actually more dominated by the community Carici humilis-Centaureetum rupestris. For the wider vi- cinity of the research area Strgar (1985) mentions the species Sesleria albicans = S. caerulea subsp. calcaria (Mt. Planinska gora), while the taxon Sesleria kalniken- sis is mentioned for the quite distant settlement of Pred- jama. Even according to the data in the FloVegSi data- base (as of November 2010) there are no known localities of the subspecies Seleria juncifolia subsp. kalnikensis in the vicinity of Planina. Based on two dominant species, Sesleria calcaria and Satureja liburnica the studied meadow at Planina could be classified into the, for the time being only provisionally described, association Sa- turejo liburnicae-Seslerietum calcariae Dakskobler 2006 nom. prov. Its stands were found on the northern edge of the Trnovski gozd plateau near Stanov rob (Dakskobler 2006: 81, 85 and Table 1, relevés 50 and 51) and were at the time temporarily classified into the class Elyno-Ses- lerietea. A comparison of two relevés near Stanov rob with our relevé shows a small, 18 % floristic similarity according to Sørensen (1948), which leads us to the conclusion that there are two altitudinal forms – sub- Figure 2: Distribution of Chouardia litardierei in Slovenia Slika 2: Razširjenost vrste Chouardia litardierei v Sloveniji 102 ANDREJ SELIŠKAR & IGOR DAKSKOBLER: A NEW LOCALITY OF CHOUARDIA LITARDIEREI = SCILLA LITARDIEREI ... FOLIA BIOLOGICA ET GEOLOGICA 52/1-2 – 2011 Figure 3: Photograph of herbarium specimens of the species from the genus Chouardia a – Chouardia litardierei – Planinsko polje, marsh meadow (leg. I. Dakskobler, A. Seliškar B. Vreš & T. Čelik) b – Chouardia litardierei – Planina, dry meadow (leg. I. Dakskobler & A. Seliškar) c – Chouardia lakusicii – Mramorje (the Vojnik mountains above Nikšić, Montenegro (leg. S. Vuksanović, I. Četkić, B. Vreš, B. Surina, NHMR1408) Slika 3: Fotografija herbarijskih pol z vrstami rodu Chouardia a – Chouardia litardierei – Planinsko polje, vlažen travnik (leg. I. Dakskobler, A. Seliškar B. Vreš & T. Čelik) b – Chouardia litardierei – Planina, suh travnik (leg. I. Dak- skobler & A. Seliškar) c – Chouardia lakusicii – Mramorje (gora Vojnik nad Nikšićem, Črna Gora (leg. S. Vuksanović, I. Četkić, B. Vreš, B. Surina, NHMR1408) a bc 103 ANDREJ SELIŠKAR & IGOR DAKSKOBLER: A NEW LOCALITY OF CHOUARDIA LITARDIEREI = SCILLA LITARDIEREI ... FOLIA BIOLOGICA ET GEOLOGICA 52/1-2 – 2011 montane and montane – of a transitional meadow com- munity at the junction of the Dinaric and Submediter- ranean pyhtogeographical regions. The submontane form at Planina can definitely be classified into the alli- ance Saturejion subspicatae and order Scorzonero-Chyr- sopogonetalia. 4 DISCUSSION AND CONCLUSIONS The occurrence of Chouardia litardierei on a dry mead- o w a t P l a n i n a n e a r P o s t o j n a i s u n u s u a l , b e c a u s e t h r o u g h - out its distribution area this character species of moist meadows as a rule occurs only on moist meadows. A very similar species, Chouardia lakusicii, occurs on dry sites similar to the above, in the southern part of the distribution area (Biokovo, Herzegovina, Montenegro). Our specimens that were collected on locality Na Lepe- n i w e r e c o m p a r e d t o Š i l i ć ’ s ( 1 9 9 1 ) d e s c r i p t i o n o f Chouardia lakusicii, to herbarium specimens of this species that were made available to us by Boštjan Surina and to the specimens of Chouardia litardierei, which grows relatively close to our new locality, on a site char- acteristic for this species – the periodically flooded Planinsko polje (Figures 3 a, 4). It was subsequently de- termined that according to their morphological traits they cannot be classified into the taxon Chouardia laku- sicii, as they belong in the framework of morphological variability of the taxon Chouardia litardierei. Some specimens were noticed also in a some 100 m removed, frequently mowed dry meadow with scarce red pines near a weekend house. The studied species is most likely a natural species also on this plot of land as the owner only cleared the bushes on the former meadow, but did not interfere with its original species composition (ex- cept on a small patch). Boštjan Surina (in litt.) kindly gave us the information on the growth of Chouardia li- tardierei on Sinjsko polje (the southeastern fringes of the Svilaja mountain range, south Croatia), on a very dry grassland (Saturejion subspicatae, the soil type is jerovica or terra rossa) that is being overgrown with Os- trya carpinifolia, Juniperus communis, Carpinus orien- talis and Quercus pubescens. On 7 May 2006 Surina re- corded the following species on this grassland (assess- ments according to Braun-Blanquet 1964): The shrub layer: Juniperus communis +, Carpinus orientalis +; the herb layer: Chouardia=Scilla literdierei +, Sesleria junci- folia subsp. juncifolia 1, Carex humilis 1, C. caryophyllea 1, Fumana procumbens 1, Linum tenuifolium +, Edra- ianthus tenuifolius +, Plantago holosteum +, Satureja subspicata subsp. subspicata +, Paronychia kapela +. Taking into account our new locality, our relevé and ob- servations by B. Surina (in litt.) we can therefore con- clude that Chouardia litardierei grows also on very dry sites similar to those in the southern part of the distri- bution area where another species, Chouardia lakusicii, usually grows. There are several species that can grow on quite or even very moist as well as on quite dry sites. One of them, for example, is Gladiolus illyricus, which grows on Planinsko polje together with Chouardia litar- dierei and can also be found on dry Submediterranean grasslands with a species composition similar to that of the researched dry meadow at Planina. We propose that this meadow be preserved through mowing and that the population of Chouardia litardierei h e r e s h o u l d b e monitored also in the future. ACKNOWLEDGEMENTS The field work at Planina near Postojna was performed in the framework of Mapping of Non-Forest Habitat Types of Slovenia project, the Area of Planinsko polje, which was funded by the Ministry of the Environment and Spatial Planning (Contract No. 2511-09-610111). Sincere thanks to Dr. Boštjan Surina for the herbarium specimens of Chouardia lakusicii from the herbarium of the Natural History Museum Rijeka – NHMR) and for his permission to use his previously unpublished data on the growth of Chouardia litardierei in Croatia also on dry grasslands in our article, as well as for his critical review of the text. Dr. Branko Vreš also provided valua- ble advice in writing this article. Aleksander Marinšek, MSc, told us the local name for the part of Planina near the sandpit (Na Lepeni). Some useful information on the ecology and distribution of Chouardia litardierei in Croatia was kindly provided to us by Prof. Dr. Toni Nikolić and Prof. Dr. Jasenka Topić. Iztok Sajko pre- pared Figure 1 for print. English translation by Andreja Šalamon Verbič. 104 ANDREJ SELIŠKAR & IGOR DAKSKOBLER: A NEW LOCALITY OF CHOUARDIA LITARDIEREI = SCILLA LITARDIEREI ... FOLIA BIOLOGICA ET GEOLOGICA 52/1-2 – 2011 Uvod Ilirska vrsta Chouardia litardierei = Scilla litardierei je v Sloveniji znamenita (T. Wraber 1990: 216), ranljiva (T. Wraber & Skoberne 1989: 293–294, Rdeči seznam 2002: 8908) in zavarovana (Skoberne 2007: 84). Pri nas jo poznamo šele od leta 1977 (Petkovšek & Seliškar 1977, 1978) in to na razmeroma omejenem območju na občasno poplavljenem Planinskem polju. To je tudi njeno najbolj severno nahajališče v celotnem arealu, ki sega vzdolž Dinarskega gorstva do Črne gore (Gaži-Baskova 1962, Petkovšek & Seliškar 1977: 108–109, Prapro- tnik 1987: 41–42, T. Wraber, ibid.), uspevanje v Albani- ji pa ni gotovo (Speta 1998: 98). Najditelja sta njeno rasti- šče in razširjenost na tem znamenitem polju podrobno preučila (Petkovšek & Seliškar, ibid., tudi 1979). Našla sta jo le v travniški združbi, ki je značilna za občasno po- plavljena kraška polja in jo je opisal Ilijanić (1979) kot asociacijo Deschampsio-Plantaginetum altissimae iz zveze Molinion. Pojavljanje na že znanih nahajališčih smo med kartiranjem negozdnih habitatnih tipov na Planinskem polju v letu 2010 potrdili in jo našli v širši okolici še na novih močvirnih rastiščih, v populacijah velikih nekaj tisoč osebkov. T udi drugod v območju njene razširjenosti navadno uspeva na močvirnih travnikih kraških polj, ponekod tudi na vlažnih in nekoliko slanih rastiščih in jo štejejo za značilnico zveze vlažnih subme- diteranskih travnikov Molinio-Hordeion secalini Horva- tić (1934) 1958. Na Hrvaškem uspeva v več združbah iz te zveze (Trinajstić 2008: 68–70). Pri kartiranju habita- tnih tipov na Planinskem polju in v njegovi okolici smo 7. 6. 2010 našli vrsto Chouardia litardierei v povsem dru- gačnih rastiščnih razmerah, na suhem travniku na robu urbanega naselja Planina, v bližini velikega opuščenega peskokopa (slika 1), kjer je cvetelo okoli 20 primerkov. V južnem delu areala te vrste (Biokovo na Hrvaškem, Her- cegovina, Črna gora) je Šilić (1991) opisal podobno vrsto Scilla lakusicii = Chouardia lakusicii, ki pa uspeva na suhih rastiščih s plitvimi tlemi (Šilić 1990, Šilić & Šolić 2002). Potrebna je bila torej tudi primerjava naših pri- merkov s primerki te nove vrste (slika 3). Zato, in ker je to novo nahajališče v novem kvadrantu srednjeevropskega kartiranja flore (slika 2), ga bomo v nadaljevanju opisali in razpravljali o vzrokih za pojavljanje značilnice vlažnih travnikov na suhem submediteranskem travišču. Metode Floro in vegetacijo na Planinskem polju in v njegovi okolici smo preučevali po ustaljenih srednjeevropskih metodah (Braun-Blanquet 1964, Ehrendorfer & Hamann 1965). Fitocenološki popis smo vnesli v bazo podatkov FloVegSi (T. Seliškar, A. Seliškar & Vreš 2003). S to aplikacijo smo izdelali tudi arealno karto (slika 2). Nomenklaturni vir za imena praprotnic in se- menk je Mala flora Slovenije (Martinčič et al. 2007) razen pri vrsti Chouardia litardierei (Breistr.) Speta, kjer sledimo nomenklaturi, ki jo je utemeljil Speta (1998). Nomenklaturni vir za imena sintaksonov je Seliškar (1996). Rezultati 0151/3 (UTM 33TVL47): Slovenija, Notranjska, Planina pri Postojni, Na Lepeni, južno od obsežnega peskokopa, ki je na vznožju hriba Hrbce, na severozahodnem robu naselja, blago pobočje nad cesto, suho travišče, ki ni več košeno in se z roba zarašča predvsem z rdečim borom, toploljubnimi listavci ter lesko, Saturejo liburnicae-Se- slerietum calcariae nom. prov. (tabela 1, sliki 5 in 6). Okoli 20 cvetočih primerkov (skupaj s sterilnimi po- ganjki 37). Leg. & det. I. Dakskobler & A. Seliškar, 7. 6. 2010, 520 m n. m., herbarij LJS 11605. Vrsto Chouardia litardierei smo popisali v travniški združbi, ki jo prikazuje tabela 1. Skupno smo na tem travniku določili 65 vrst, med njimi jih je le 7 skupnih s travnikom, kjer raste ta vrsta na Planinskem polju in sta ga popisala Petkovšek & Seliškar (1977: 110–111) in na njem določila 75 vrst. Skupne vrste obema popisoma so Chouardia litardierei, Galium boreale, Pimpinella saxifraga, Filipendula vulgaris, Linum catharticum, Fe- stuca rubra in Lotus corniculatus. Floristična podobnost po Sørensen-u (1948) je le 10 %.Torej gre očitno za dve povsem različni travniški združbi. Na opuščenem trav- niku pri peskokopu po deležu (63 %) izrazito prevladuje- jo vrste suhih in polsuhih travišč iz razreda Festuco-Bro- metea, med njimi je tudi nekaj diagnostičnih vrst za su- bmediteransko-ilirski red Scorzonero-Chrysopogoneta- lia = Scorzoneretalia villosae (npr. Knautia illyrica, Plan- tago holosteum, Chrysopogon gryllus, Sanguisorba muri- cata in Centaurea scabiosa subsp. fritschii) in nekaj dia- gnostičnih vrst za suha submediteranska travišča iz zveze Saturejion subspicatae (npr. vrste Satureja subspi- cata subsp. liburnica, Satureja montana subsp. variegata in Euphrasia illyrica). Tudi po prisotnosti še nekaterih drugih v širšem smislu razlikovalnih vrst submedite- ranskih suhih travišč (npr. Ruta divaricata, Carex humilis,Teucrium montanum, Globularia cordifolia, Do- rycnium germanicum, Festuca rupicola, Veronica barre- 5 POVZETEK 105 ANDREJ SELIŠKAR & IGOR DAKSKOBLER: A NEW LOCALITY OF CHOUARDIA LITARDIEREI = SCILLA LITARDIEREI ... FOLIA BIOLOGICA ET GEOLOGICA 52/1-2 – 2011 lieri) bi popisani travnik lahko uvrstili v asociacijo Cari- ci humilis-Centaureetum rupestris, vendar je dominan- tna vrsta na našem popisu modrika, Sesleria caerulea subsp. calcaria. Petkovšek & Seliškar (1982: 77) sta suha travišča v okolici Planine kartirala kot asociacijo Carici humilis-Seslerietum juncifoliae Horvat 1930, ven- dar v opombah dodajata, da na obravnavanem ozemlju dejansko bolj prevladuje združba Carici humilis-Centa- ureetum rupestris. Strgar (1985) v širši okolici obrav- navanega območja omenja vrsto Sesleria albicans = S. caerulea subsp. calcaria (Planinska gora), takson Sesle- ria kalnikensis pa pri precej oddaljeni Predjami. Tudi po podatkih v bazi FloVegSi (stanje november 2010) v oko- lici Planine ni znanih nahajališč podvrste Sesleria junci- folia subsp. kalnikensis. Na podlagi dveh dominantnih vrst, Sesleria calcaria in Satureja liburnica, bi preučeni travnik pri Planini lahko uvrstili v za zdaj le provizorno opisano asociacijo Saturejo liburnicae-Seslerietum cal- cariae Dakskobler 2006 nom. prov. Njene sestoje smo našli na severnem robu Trnovskega gozda pri Stanovem robu (Dakskobler 2006: 81, 85 in tabela 1, popisa 50 in 51) in jih takrat začasno uvrstili v razred Elyno-Seslerie- tea. Primerjava dveh popisov pri Stanovem robu z našim popisom sicer pokaže majhno, 18 % floristično podob- nost po Sørensen-u ( 1948), iz česar sklepamo na dve višinski obliki – submontansko in montansko – preho- dne travniške združbe na stiku dinarskega in submedi- teranskega fitogeografskega območja. Submontansko formo pri Planini vsekakor lahko uvrstimo v zvezo Sa- turejion subspicatae in v red Scorzonero-Chyrsopogone- talia. Razprava in zaključki Pojavljanje vrste Chouardia litardierei na suhem travni- ku pri Planini pri Postojni je nenavadno, saj se ta značil- nica vlažnih travnikov v celotnem arealu razširjenosti praviloma pojavlja na vlažnih travnikih. Na podobnih suhih rastiščih uspeva v južnem delu areala (Biokovo, Hercegovina, Črna gora) sorodna vrsta Chouardia laku- sicii. Primerke, nabrane Na Lepeni, smo primerjali s Ši- lićevim (1991) opisom vrste Chouardia lakusicii in s her- barijskimi primerki te vrste, ki nam jih je posredoval Boštjan Surina ter s primerki vrste Chouardia litardie- rei, ki raste razmeroma blizu našega novega nahajališča, na zanjo značilnem rastišču, na občasno poplavljenem Planinskem polju (sliki 3 a, 4). Ugotovili smo, da jih po morfoloških znakih ne moremo uvrstiti v takson Chou- ardia lakusicii, pač pa sodijo v okvir morfološke varia- bilnosti taksona Chouardia litardierei. Nekaj primerkov smo opazili tudi na okrog 100 m oddaljenem, pogosto košenem suhem travniku z redkimi rdečimi bori v bliži- ni počitniške hišice. T udi na tej parcel je obravnavana vrsta najbrž naravna, saj je lastnik nekdanji zaraščajoči pašnik le očistil grmovja, ni pa (razen na majhni gredici) spreminjal njegove prvotne vrstne sestave. Boštjan Suri- na (in litt.) nam je ljubeznivo posredoval podatek o uspevanju vrste Chouardia litardierei na Sinjskem polju (jugovzhodni obronki gorovja Svilaja, južna Hrvaška), na zelo suhem travišču ( Satureion subspicatae, talni tip je jerovica ali terra rossa), ki se zarašča z vrstami Ostrya carpinifolia, Juniperus communis, Carpinus orientalis in Quercus pubescens. Na tem travišču je Surina 7. 5. 2006 popisal naslednje vrste (ocene po Braun-Blanquet 1964): Grmovna plast: Juniperus communis +, Carpinus orientalis +; z el i š č na pl a s t : Chouardia=Scilla literdierei +, Sesleria juncifolia subsp. juncifolia 1, Carex humilis 1, C. caryophyllea 1, Fumana procumbens 1, Linum tenuifoli- um +, Edraianthus tenuifolius +, Plantago holosteum +, Satureja subspicata subsp. subspicata +, Paronychia ka- pela +. Iz našega novega nahajališča in popisa in opažanj B. Surine (in litt.) torej lahko sklepamo, da uspeva vrsta Chouardia litardierei tudi na zelo suhih rastiščih, na po- dobnih kot v južnem delu areala navadno uspeva druga vrsta, Chouardia lakusicii. Ni tako malo vrst, ki uspeva- jo na vlažnih in tudi na razmeroma suhih rastiščih. Ena izmed njih je npr. Gladiolus illyricus, ki na Planinskem polju raste skupaj z vrsto Chouardia litardierei, najdemo pa jo tudi na suhih submediteranskih traviščih s podob- no vrstno sestavo, kot jo ima preučeni suhi travnik pri Planini. Zanj predlagamo, da se ga s košnjo poskuša ohraniti, populacijo travniške morske čebulice na njem pa je koristno spremljati tudi v naslednjih letih. REFERENCES – LITERATURA Braun-Blanquet, J., 1964: Pflanzensoziologie. Grundzüge der Vegetationskunde. 3. Auf., Springer Verlag, Wien– New York. Dakskobler, I., 2006: Calcareous open sedge swards and stony grasslands (Seslerietalia caeruleae) on the northern edge of the Trnovski gozd plateau (the Dinaric mountains, western Slovenia). Hacquetia (Ljubljana) 5 (1): 73–112. Ehrendorfer, F. & U. Hamann, 1965: Vorschläge zu einer floristischen Kartierung von Mitteleuropa. Berichte der Deutschen Botanischen Gesellschaft 78: 35–50. 106 ANDREJ SELIŠKAR & IGOR DAKSKOBLER: A NEW LOCALITY OF CHOUARDIA LITARDIEREI = SCILLA LITARDIEREI ... FOLIA BIOLOGICA ET GEOLOGICA 52/1-2 – 2011 Gaži-Baskova, V., 1962: Geografska raširjenost lučike (Scilla pratensis W. et K.). Biološki glasnik (Zagreb) 15: 49–54. Ilijanić, L.,1979: Die Vegetationverhältnisse des Sees von Cerknica. Sumpf-, Moor-¸und Wiesen-vegetation. Acta car- sologica (Ljubljana) 8 (2): 166–200. Martinčič, A., T. Wraber, N. Jogan, A. Podobnik, B. Turk, B. Vreš, V. Ravnik, B. Frajman, S. Strgulc Kraj- šek, B. Trčak, T. Bačič, M. A. Fischer, K. Eler & B. Surina, 2007: Mala flora Slovenije. Ključ za določanje praprotnic in semenk. Četrta, dopolnjena in spremenjena izdaja. Tehniška založba Slovenije, Ljubljana. Petkovšek, V. & A. Seliškar, 1978: Travniška morska čebulica, novost v slovenski flori. Proteus (Ljubljana) 40 (5): 160–161. Petkovšek, V. & A. Seliškar, 1977: Scilla pratensis W. et K. pomembna nova cvetnica za Slovenijo. Biološki vestnik (Ljubljana) 25: 107–113. Petkovšek, V. & A. Seliškar, 1979: Vegetacija na Planinskem polju in njeno varstvo. Varstvo narave (Ljubljana) 12: 13–32. Petkovšek, V. & A. Seliškar 1982: Traviščna vegetacija . V: Zupančič M. & I. Puncer (eds.): Vegetacijska karta Postoj- na L 33–77. T olmač k vegetacijskim kartam 2. Slovenska akademija znanosti in umetnosti, Razred za nara- voslovne vede, Biološki inštitut Jovana Hadžija, Ljubljana: 67–89. Praprotnik, N., 1987: Ilirski florni element v Sloveniji. Univerza v Ljubljani, Biotehniška fakulteta, Oddelek za bi- ologijo, Ljubljana (Doktorska disertacija, 234 str.). Pravilnik o uvrstitvi ogroženih rastlinskih in živalskih vrst v rdeči seznam 2002: Priloga 1: Rdeči seznam praprotnic in semenk (Pteridophyta & Spermatophyta). Uradni list RS 12 (82): 8893–8910. Seliškar, A., 1996: Traviščna in močvirna vegetacija . V: Gregori, J. et al. (eds.): Narava Slovenije, stanje in perspektive. Društvo ekologov Slovenije, Ljubljana, 99–106. Seliškar, T., B. Vreš & A. Seliškar, 2003: FloVegSi 2.0. Računalniški program za urejanje in analizo bioloških po- datkov. Biološki inštitut ZRC SAZU, Ljubljana. Skoberne, P., 2007: Zavarovane rastline Slovenije. Narava na dlani. Žepni vodnik. Mladinska knjiga, Ljubljana. Speta, F., 1998: Systematische Analyse der Gattung Scilla L. s. l. (Hyacinthaceae). Phyton (Horn, Austra) 38 ( 1 ): 1–141. Šilič, Č., 1990: Morfologija, horologija i fenologija dviju grupa populacija vrsta Scilla litardierei Brestr. (= Scilla pra- tensis Waldst. & Kit., non Bergeret). Bilten Društva ekologa Bosne i Hercegovine, ser. B. br. 5: 107–115, Sarajevo. Šilić, Č., 1991: Scilla lakusicii sp. nov. – nova vrsta genusa Scilla L. i njeni srodnički odnosi sa vrstom S. litardieri Bre- istr. Glasn. Zem. Muz. Bosne Herc. (Sarajevo) 30: 29–41. Šilić, C. & Šolić, M. E., 2002: Chouardia lakusicii Speta – nova vrsta u flori Hrvatske. Hladnikia (Ljubljana) 14: 41– 44. Sørensen, Th., 1948: A method of establishing groups of equal amplitude in plant sociology based on similarity of spe- cies content. Det Kongelige Danske Videnskaberns Selskab, Biologiske Skrifter (København) 5 (4): 1–34. Strgar,V., 1985: Sesleria na območju karte Postojna L. 33–77 v južni Sloveniji . Biološki vestnik (Ljubljana) 33(1): 61– 71. Trinajstić, I., 2008: Biljne zajednice Republike Hrvatske. Akademija šumarskih znanosti, Zagreb. Wraber, T., 1990: Sto znamenitih rastlin na Slovenskem. Prešernova družba, Ljubljana. Wraber, T. & P. Skoberne, 1989: Rdeči seznam ogroženih praprotnic in semenk SR Slovenije. Varstvo narave (Ljublja- na) 14–15: 1–429. 107 ANDREJ SELIŠKAR & IGOR DAKSKOBLER: A NEW LOCALITY OF CHOUARDIA LITARDIEREI = SCILLA LITARDIEREI ... FOLIA BIOLOGICA ET GEOLOGICA 52/1-2 – 2011 Figure 4: Stand of the asssociation Deschampsio-Plantaginetum altissimae with dominant Chauardia litardierii in Planinsko polje (Photo A. Seliškar) Slika 4: Sestoj asociacije Deschampsio-Plantaginetum altissimae s prevladujočo vrsto Chauardia litardierii na Planinskem polju (Foto A. Seliškar) Figure 5: Dry meadow Na Lepeni at Planina near Postojna, the new locality of Chauardia litardierii (Photo A. Seliškar) Slika 5: Suh travnik Na Lepeni pri Planini pri Postojni, novo nahajališče vrste Chauardia litardierii (foto A. Seliškar) 108 ANDREJ SELIŠKAR & IGOR DAKSKOBLER: A NEW LOCALITY OF CHOUARDIA LITARDIEREI = SCILLA LITARDIEREI ... FOLIA BIOLOGICA ET GEOLOGICA 52/1-2 – 2011 Figure 6: Chauardia litardierii in the community of Sesleria caerulea subsp. calcaria (Photo A. Seliškar) Slika 6: Chauardia litardierii v združbi s taksonom Sesleria caerulea subsp. calcaria (Foto A. Seliškar) 109 ANDREJ SELIŠKAR & IGOR DAKSKOBLER: A NEW LOCALITY OF CHOUARDIA LITARDIEREI = SCILLA LITARDIEREI ... FOLIA BIOLOGICA ET GEOLOGICA 52/1-2 – 2011 Table 1: Vegetation composition of dry meadow with Chouardia litardierei at Planina near Postojna Tabela 1: Vegetacijska sestava suhega travnika z vrsto Chouardia litardierei pri Planini pri Postojni Number of relevé (Zaporedna številka popisa) 1 Working number of relevé (Delovna številka popisa) 236896 Altitude in m (Nadmorska višina v m) 520 Aspect (Lega) N Slope in degrees (Nagib v stopinjah) 5 Parent material (Matična podlaga) A Soil (Tla) R Stoniness in % (Kamnitost v %) 10 Cover in % (Zastiranje v % ): Herb layer (Zeliščna plast) E1 90 Relevé area (Velikost popisne ploskve) - m 2 30 Number of species (Število vrst) 65 Date of taking relevé (Datum popisa) 6/7/2010 Locality (Nahajališče) Planina (Postojna) Quadrant (Kvadrant) 0151/3 SCh Scorzonero-Chrysopogonetalia Satureja subspicata subsp. liburnica E1 2 Sanguisorba muricata E1 1 Centaurea scabiosa subsp. fritschii E1 + Chrysopogon gryllus E1 + Euphrasia illyrica E1 + Knautia illyrica E1 + Plantago holosteum E1 + Satureja montana subsp. variegata E1 + FB Festuco-Brometea Bromopsis erecta E1 2 Potentilla heptaphylla E1 2 Allium carinatum subsp. pulchellum E1 1 Brachypodium rupestre E1 1 Carex humilis E1 1 Galium lucidum E1 1 Helianthemum ovatum E1 1 Pimpinella saxifraga E1 1 Teucrium chamaedrys E1 1 Thymus praecox E1 1 Anthyllis vulneraria subsp. carpatica E1 + Asperula cynanchica E1 + Briza media E1 + Carlina acaulis E1 + Centaurium erythraea E1 + Dorycnium germanicum E1 + Euphorbia cyparissias E1 + Euphorbia verrucosa E1 + Festuca rupicola E1 + Filipendula vulgaris E1 + Galium verum s. str. E1 + Hippocrepis comosa E1 + Inula hirta E1 + Koeleria pyramidata E1 + Linum catharticum E1 + Medicago falcata E1 + Plantago media s. str. E1 + Polygala comosa E1 + Veronica barrelieri E1 + Silene vulgaris subsp. vulgaris E1 + Teucrium montanum E1 + Thlaspi praecox E1 + Selaginella helvetica E1 + KC Koelerio-Corynephoretea Petrorhagia saxifraga E1 + Sedum sexangulare E1 + 110 ANDREJ SELIŠKAR & IGOR DAKSKOBLER: A NEW LOCALITY OF CHOUARDIA LITARDIEREI = SCILLA LITARDIEREI ... FOLIA BIOLOGICA ET GEOLOGICA 52/1-2 – 2011 ES Elyno-Seslerietea Sesleria caerulea subsp. calcaria E1 4 Globularia cordifolia E1 + Mo Molinion caeruleae Galium boreale E1 1 Chouardia litardierei E1 1 Gymnadenia conopsea E1 + MA Molinio-Arrhenatheretea Festuca rubra subsp. rubra E1 1 Lotus corniculatus E1 + Crocus albiflorus E1 r TG Tr ifolio - Ge ranie te a Silene nutans s. lat. E1 1 Anthericum ramosum E1 + Ruta divaricata E1 + Viola hirta E1 + RP Rhamno-Prunetea Viburnum lantana E1 + EP Erico-Pinetea Chamaecytisus purpureus E1 1 Aster amellus E1 + Carex ornithopoda E1 + Pinus sylvestris E1 + FS Fagetalia sylvaticae Cyclamen purpurascens E1 + QP Quercetalia pubescentis Aristolochia lutea E1 + Fraxinus ornus E1 + Helleborus multifidus subsp. istriacus E1 + QF Querco-Fagetea Quercus robur E1 +