Abstract
Trisetum spicatum, a widespread arctic and alpine species, is reported for the first time in the flora of Iran. This species was collected from scree habitats above 4000 m a.s.l. of Mt. Damavand (Central Alborz, Alborz range, N. Iran). This new occurrence of the species in the alpine area of Iran highlights the role of high mountains as migration corridors and refugee during interglacial periods. This new record is different from the other species by its habitat characteristics, compact inflorescence and having dense trichomes on whole parts especially on the peduncle. In addition, ecological and floristic characteristics of the habitat of the species are discussed.
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<p>Doostmohammadi, M. & Kilian, N. (2017) Lactuca pumila (Asteraceae, Cichorieae) revisited – additional evidence for a phytogeographical link between SE Zagros and Hindu Kush. <em>Phytotaxa </em>307: 133–140. https://doi.org/10.11646/phytotaxa.307.2.4</p>
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<p>Finot, V.L., Peterson, P.M, Soreng, R.J. & Zuloaga, F.O. (2004) A Revision of <em>Trisetum</em>, <em>Peyritschia</em>, and <em>Sphenopholis</em> (Poaceae: Pooideae:Aveninae) in México and Central America. <em>Annals of Missouri Botanical Garden</em> 91: 1–30.</p>
<p>Finot, V.L., Peterson, P.M., Soreng, R.J. & Zuloaga, F.O. (2005) A revision of <em>Trisetum</em> and <em>Graphephorum</em> (Poaceae: Pooideae: Aveninae) in North America. <em>Sida</em> 21: 1419–1453.</p>
<p>Finot, V.L. (2010) Analysis of species boundaries in <em>Trisetum</em> Pers. Sect. <em>Trisetaera</em> Asch. & Graebn. (Poaceae) in America using statistical multivariate methods. <em>Current Topics in Plant Biology</em>11: 39–74.</p>
<p>Forsskål, P (1775) <em>Flora Aegyptiaco-Arabica</em>. Hauniæ, 219 pp.</p>
<p>Gussarova, G., Allen, G.A., Mikhaylova, Y., McCormick, L.J., Mirré, M., Marr, K.L., Hebda, R.J. & Brochmann, C. (2015) Vicariance, long-distance dispersal, and regional extinction–recolonization dynamics explain thedisjunct circumpolar distribution of the arctic-alpineplant <em>Silene acaulis</em>. <em>American Journal of Botany</em> 102: 1–18. https://doi.org/10.3732/ajb.1500072</p>
<p>Hill, J. (1768) <em>Hortus kewensis</em>. Londini, 458 pp.</p>
<p>Hooker, C.G. (1896) <em>Flora of british india</em>. Reeve, London, 740 pp.</p>
<p>Horsák, M., Chytrý, M., Pokryszko, B.M., Danihelka, J., Ermakov, N., Hájek, M., Hájková, P., Kintrová, K., Kočí, M., Kubešová, S., Lustyk, P., Otýpková, Z., Pelánková, B. & Valachovič, M. (2010) Habitats of relict terrestrial snails in southern Siberia: Lessons for the reconstruction of palaeoenvironments of full-glacial Europe. <em>Journal of Biogeography</em> 37: 1450–1462. https://doi.org/10.1111/j.1365-2699.2010.02280.x</p>
<p>Horsák, M., Chytrý, M., Hájková, P., Hájek, M., Danihelka, J., Horsáková, V., Ermakov, N., German, D.A., Kočí, M., Lustyk, P., Nekola, J.C., Preislerová, Z. & Valachovič, M. (2015) European glacial relict snails and plants: environmental context of their modern refugial occurrence in southern Siberia. <em>Boreas</em> 44: 638–657. https://doi.org/10.1111/bor.12133</p>
<p>Hulten, E. (1959) The Trisetum spicatum complex. <em>Svensk Botanisk Tidskrift</em> 53 (2): 203–228.</p>
<p>Janská, V., Jiménez-Alfaro, B., Chytrý, M., Divíšek, J., Anenkhonov, O., Korolyuk, A., Lashchinskyi, N. & Culek, M. (2017) Palaeodistribution modelling of European vegetation types at the Last Glacial Maximum using modern analogues from Siberia: Prospects and limitations. <em>Quaternary Science Reviews</em> 159: 103–115. https://doi.org/10.1016/j.quascirev.2017.01.011</p>
<p>Jonsell, B., Palsson, J. & Portén, E.K. (1975) Variation and affinities of <em>Trisetum spicatum</em> (L.) Richt. s. lat. (Gramineae) in Iceland. <em>Svensk Botanisk Tidskrift </em>69: 113–142.</p>
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