Festuca vivipara, the viviparous sheep's-fescue, is a species of grass native to northern Europe, northern Asia, and subarctic North America. The specific epithetvivipara is Latin, referring to the florets' alteration to leafy tufts. The plant can have a diploid number of 28, 49, 56, or 63, though numbers of 21, 35, and 42 have also been reported.
Festuca vivipara is a perennial grass growing 5–20 cm (2.0–7.9 in) tall with capillary culms. The plant grows in dense tufts. The internodes are glabrous or somewhat puberulent. Dead leaf sheaths either persist or shred into fibers, while living sheaths are tinged purple and have a prominent midvein. The auricle is occasionally marked by a distinct swelling. The erose ligule is 0.2–0.5 mm (0.0079–0.0197 in) long. The setaceous leaf blades somewhat stiff, and the flag leaf blade is about 0.5–2.5 cm (0.20–0.98 in) long. In a cross-section, the leaf blade is typically 0.5–0.9 mm (0.020–0.035 in) wide and 0.25–0.6 mm (0.0098–0.0236 in) thick. In the cross-section, sclerenchyma are arranged in three large bundles and up to four smaller bundles, with adaxial sclerenchyma either somewhat developed along the margin to a thick subepidermal band. The strongly proliferous, compact panicles are 2–10 cm (0.79–3.94 in) long, with flowers as leafy tufts. The purplish spikelets are 0.7–3.5 cm (0.28–1.38 in) long. The glumes are much shorter than the spikelets and have erose margins. The lower glume is 2.0–4.5 mm (0.079–0.177 in) long with one vein, and the upper glume is 3–5 mm (0.12–0.20 in) long with three veins. The membraneous, awnlesslemmas are 4–6 mm (0.16–0.24 in) long when not modified, and are strongly inrolled.[1] The paleas are absent or reduced. Lodicules are toothed when present and lack hairs.[2]
^ abMerrit Lyndon Fernald (1970). R. C. Rollins (ed.). Gray's Manual of Botany (Eighth (Centennial) - Illustrated ed.). D. Van Nostrand Company. p. 105. ISBN0-442-22250-5.
^Aiken, S. G. & Darbyshire, S. J. (1935). Fescue grasses of Canada. Canada Department of Agriculture. p. 75-76. ISBN0-660-13483-7.
^Umberto Quattrocchi (2006). CRC World Dictionary of Grasses: Common Names, Scientific Names, Eponyms, Synonyms, and Etymology. CRC Press. p. 962. ISBN9781420003222.
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January 01, 1970
festuca, vivipara, viviparous, sheep, fescue, species, grass, native, northern, europe, northern, asia, subarctic, north, america, specific, epithet, vivipara, latin, referring, florets, alteration, leafy, tufts, plant, have, diploid, number, though, numbers, . Festuca vivipara the viviparous sheep s fescue is a species of grass native to northern Europe northern Asia and subarctic North America The specific epithet vivipara is Latin referring to the florets alteration to leafy tufts The plant can have a diploid number of 28 49 56 or 63 though numbers of 21 35 and 42 have also been reported Festuca vivipara Scientific classification Kingdom Plantae Clade Tracheophytes Clade Angiosperms Clade Monocots Clade Commelinids Order Poales Family Poaceae Subfamily Pooideae Genus Festuca Species F vivipara Binomial name Festuca vivipara L Sm Contents 1 Description 2 Distribution and habitat 3 Subspecies 4 References 5 External linksDescription editFestuca vivipara is a perennial grass growing 5 20 cm 2 0 7 9 in tall with capillary culms The plant grows in dense tufts The internodes are glabrous or somewhat puberulent Dead leaf sheaths either persist or shred into fibers while living sheaths are tinged purple and have a prominent midvein The auricle is occasionally marked by a distinct swelling The erose ligule is 0 2 0 5 mm 0 0079 0 0197 in long The setaceous leaf blades somewhat stiff and the flag leaf blade is about 0 5 2 5 cm 0 20 0 98 in long In a cross section the leaf blade is typically 0 5 0 9 mm 0 020 0 035 in wide and 0 25 0 6 mm 0 0098 0 0236 in thick In the cross section sclerenchyma are arranged in three large bundles and up to four smaller bundles with adaxial sclerenchyma either somewhat developed along the margin to a thick subepidermal band The strongly proliferous compact panicles are 2 10 cm 0 79 3 94 in long with flowers as leafy tufts The purplish spikelets are 0 7 3 5 cm 0 28 1 38 in long The glumes are much shorter than the spikelets and have erose margins The lower glume is 2 0 4 5 mm 0 079 0 177 in long with one vein and the upper glume is 3 5 mm 0 12 0 20 in long with three veins The membraneous awnless lemmas are 4 6 mm 0 16 0 24 in long when not modified and are strongly inrolled 1 The paleas are absent or reduced Lodicules are toothed when present and lack hairs 2 The grass flowers from July into early August Distribution and habitat editFestuca vivipara occurs in North America from Greenland and Labrador to Alaska growing on calcareous rock and peat and can occur in western Newfoundland the Shickshock Mountains and parts of Quebec 1 Elsewhere the grass occurs in northern Europe and Russia near lakes and streams 3 Subspecies editFestuca vivipara ssp glabra Festuca vivipara ssp hirsutaReferences edit a b Merrit Lyndon Fernald 1970 R C Rollins ed Gray s Manual of Botany Eighth Centennial Illustrated ed D Van Nostrand Company p 105 ISBN 0 442 22250 5 Aiken S G amp Darbyshire S J 1935 Fescue grasses of Canada Canada Department of Agriculture p 75 76 ISBN 0 660 13483 7 Umberto Quattrocchi 2006 CRC World Dictionary of Grasses Common Names Scientific Names Eponyms Synonyms and Etymology CRC Press p 962 ISBN 9781420003222 External links edit nbsp Wikispecies has information related to Festuca vivipara nbsp Wikimedia Commons has media related to Festuca vivipara Retrieved from https en wikipedia org w index php title Festuca vivipara amp oldid 1160262230, wikipedia, wiki, book, books, library,
