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Abstract
A conspicuous wetland species, Lathyrus palustris L. with Holarctic distribution has been discovered as new for the flora of Slovenia, although the wetland flora and vegetation of the country is relatively well studied. We recorded the species in the area of the intermittent Lake Cerknica, growing in different herbaceous wetland plant communities. The ecology fits the data from the surrounding regions. Our finding fills an important gap in the distribution area between Southeastern and Central Europe, where the species’ rarity has resulted in it being declared endangered and accordingly protected.
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Copyright (c) 2026 Filip Küzmič, Jošt Stergaršek, Primož Žižek, Urban Šilc, Branko Vreš

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References
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References
Anderle, B., 2023: Pregled razširjenosti praprotnic in semenk na Gorenjskem (1st ed.). Self published, Hraše.
Anonymous, 2007a: Gesamte Rechtsvorschrift für Pflanzenartenschutzverordnung, Fassung vom 08.07.2025.
Anonymous, 2007b: Verordnung der Steiermärkischen Landesregierung vom 14. Mai 2007 über den Schutz von wild wachsenden Pflanzen, von Natur aus wild lebenden Tieren einschließlich Vögel (Artenschutzverordnung).
Anonymous, 2012: 100/2012. (IX.28.) Decree. Ministry of Rural Development.
Anonymous, 2013: Repertorio della flora italiana protetta. Ministero dell’Ambiente e della Sicurezza Energetica.
Anonymous, 2016: Pravilnik o izmjenama i dopunama Pravilnika o strogo zaštićenim vrstama.
Bakan, B., 2006: Slikovni pregled višjih rastlin Prekmurja. Razvojni center, Lendava.
Barina, Z., Csiky, J., Farkas, S., Jakab, G., Király, G., Lájer, K., … Vojtkó, A., 2007: Vörös Lista-A magyarországi edényes flóra veszélyeztetett fajai; Red list of the vascular flora of Hungary. (G. Király, Ed.). Self published, Sopron.
Bartha, D., Király, G., Schmidt, D., Tiborcz, V., Barina, Z., Csiky, J., … Zólyomi, S. (Eds.), 2015: Magyarország edényes növényfajainak elterjedési atlasza / Distribution atlas of vascular plants of Hungary. University of West Hungary Press, Sopron.
Bartolucci, F., Peruzzi, L., Galasso, G., Albano, A., Alessandrini, A., Ardenghi, N. M. G., … Conti, F., 2018: An updated checklist of the vascular flora native to Italy. Plant Biosystems 152(2), 179–303. https://doi.org/10.1080/11263504.2017.1419996
Fischer, M. A., Oswald, K., & Adler, W., 2008: Exkursionsflora für Österreich, Liechtenstein und Südtirol (3.). Land Oberösterreich, Biologiezentrum der Oberösterr. Landesmuseum, Linz.
Gaži, V., & Dubravec, K., 1978: Travnjačka vegetacija na području Vojnika kraj Celja. Mitteilungen Der Ostalpin-Dinarischen Gesellschaft Für Vegetationskunde 14, 165–172.
Hájek, M., Hájková, P., & Apostolová, I., 2006: New wetland vascular plants for Bulgaria. Phytologia Balcanica 12(3), 367–370.
Jogan, N., Bačič, T., Frajman, B., Leskovar, I., Naglič, D., Podobnik, A., … Trčak, B., 2001: Gradivo za atlas flore Slovenije. (N. Jogan, Ed.). Center za kartografijo favne in flore, Miklavž na Dravskem polju.
Kenicer, G. J., Kajita, T., Pennington, R. T., & Murata, J., 2005: Systematics and biogeography of Lathyrus (Leguminosae) based on internal transcribed spacer and cpDNA sequence data. American Journal of Botany 92(7), 1199–1209. https://doi.org/10.3732/ajb.92.7.1199
Kocjan, J. M., 2012: Prispevek k poznavanju razširjenosti ogroženih rastlinskih vrst povirij in barij v Sloveniji – I. Folia Biologica et Geologica 53(1–2), 45–78.
Kocjan, J. M., Anderle, B., Dakskobler, I., Seliškar, A., & Vreš, B., 2013: Prispevek k poznavanju razširjenosti ogroženih rastlinskih vrst povirij in barij v Sloveniji – II. Folia Biologica et Geologica 54(2), 123–175.
Kocjan, J. M., Vreš, B., Seliškar, A., Anderle, B., & Dakskobler, I., 2014: Prispevek k poznavanju razširjenosti rastlinskih vrst povirij in barij v Sloveniji – III. Folia Biologica et Geologica 55(2), 75–124.
Martinčič, A., 1991: Vegetacijska podoba vrst iz rodu Schoenus L. v Sloveniji : I. Schoenus nigricans L. Biološki vestnik 39(3), 27–40.
Martinčič, A., 2001: Vegetacijska podoba vrste Schoenus ferrugineus L. v Sloveniji. Hladnikia 12, 87–105.
Martinčič, A, & Sušnik, F., 1969: Mala flora Slovenije. Cankarjeva založba, Ljubljana.
Martinčič, A., Wraber, T., Jogan, N., Podobnik, A., Ravnik, V., Turk, B., … Surina, B., 2007: Mala flora Slovenije: ključ za določanje praprotnic in semenk (4.). Tehniška založba Slovenije, Ljubljana.
Martinčič, A., Wraber, T., Jogan, N., Ravnik, V., Podobnik, A., Turk, B., & Vreš, B., 1999: Mala flora Slovenije (3.). Tehniška založba Slovenije, Ljubljana.
Mayer, E., 1952: Seznam praprotnic in cvetnic Slovenskega ozemlja. Slovenska akademija znanosti in umetnosti, Ljubljana.
Mucina, L., Bültmann, H., Dierßen, K., Theurillat, J.-P., Raus, T., Čarni, A., … Tichý, L., 2016: Vegetation of Europe: hierarchical floristic classification system of vascular plant, bryophyte, lichen, and algal communities. Applied Vegetation Science 19(Supplement 1), 3–264. https://doi.org/10.1111/avsc.12257
Nikolić, T, & Topić, J., 2005: Red book of vascular flora of the Republic of Croatia. Ministry of Culture, State Institute for Nature Protection, Republic of Croatia, Zagreb.
Nikolić, T., 2020: Flora Croatica - Vaskularna flora Republike Hrvatske. Volumen 2 - Ključevi za determinaciju s pratećim podatcima: Equisetidae,Lycopodiidae, Ophyoglossidae, Polypodidae Cycadidae, Ginkgooidae, Gnetidae, Pinidae, Magnoliidae - porodice A -FAB (1.). Alfa, Zagreb.
Orsenigo, S., Fenu, G., Gargano, D., Montagnani, C., Abeli, T., Alessandrini, A., … Rossi, G., 2021: Red list of threatened vascular plants in Italy. Plant Biosystems 155(2), 310–335. https://doi.org/10.1080/11263504.2020.1739165
Piskernik, A., 1951: Ključ za določanje cvetnic in praprotnic. Državna založba Slovenije, Ljubljana.
Rowe, J., & Kavak, S., 2019: Lathyrus palustris. https://doi.org/10.2305/IUCN.UK.2019-2.RLTS.T18762781A135078285.en
Schratt-Ehrendorfer, L., Niklfeld, H., Schröck, C., & Stöhr, O., 2022: Rote Liste der Farn- und Blütenpflanzen Österreichs. Stapfia 114, 1–357.
Seliškar, T., Vreš, B., & Seliškar, A., 2003: FloVegSi 2.0. Računalniški program za urejanje in analizo bioloških podatkov. Biološki inštitut ZRC SAZU, Ljubljana.
Šilc, U., 2012: Vegetation Database of Slovenia. Biodiversity & Ecology 4, 428–428.
Teofilovski, A., 2018: Chorological data for some new, doubtfully known and rare plants in the flora of the Republic of Macedonia. Acta Musei Macedonici Scientiarum Naturalium 21, 13–22. Retrieved from https://acta.musmacscinat.mk/index.php/acta/article/view/22/14
Thiers, B., 2025: Index Herbariorum: A global directory of public herbaria and associated staff.
Trpin, D., & Vreš, B., 1995: Register flore Slovenije / Register of the Flora of Slovenia. Register flore Slovenije / Register of the Flora of Slovenia. ZRC SAZU, Ljubljana. https://doi.org/10.3986/9619012569
Vreš, B., & Čelik, T., 2022: New data on the occurrence of Carex lasiocarpa in Slovenia / Novosti o pojavljanju vrste Carex lasiocarpa v Sloveniji. Folia Biologica et Geologica 62(2), 255–275. https://doi.org/10.3986/fbg0089
Westhoff, V., & Van Der Maarel, E., 1978: The Braun-Blanquet Approach. In: Whittaker, R. H. (Ed.), Classification of Plant Communities, 287–399. Springer, Dodrecht. https://doi.org/10.1007/978-94-009-9183-5_9
Winter, C., Lehmann, S., & Diekmann, M., 2008: Determinants of reproductive success: A comparative study of five endangered river corridor plants in fragmented habitats. Biological Conservation 141(4), 1095–1104. https://doi.org/10.1016/j.biocon.2008.02.002
