Английская Википедия:Festuca vivipara
Шаблон:Short description Шаблон:Speciesbox
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.
Description
Festuca vivipara is a perennial grass growing Шаблон:Convert 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 Шаблон:Convert long. The setaceous leaf blades somewhat stiff, and the flag leaf blade is about Шаблон:Convert long. In a cross-section, the leaf blade is typically Шаблон:Convert wide and Шаблон:Convert 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 Шаблон:Convert long, with flowers as leafy tufts. The purplish spikelets are Шаблон:Convert long. The glumes are much shorter than the spikelets and have erose margins. The lower glume is Шаблон:Convert long with one vein, and the upper glume is Шаблон:Convert long with three veins. The membraneous, awnless lemmas are Шаблон:Convert 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
Festuca 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
- Festuca vivipara ssp. glabra
- Festuca vivipara ssp. hirsuta
References
External links
Шаблон:Wikispecies Шаблон:Commons category
- Английская Википедия
- Festuca
- Plants described in 1753
- Taxa named by Carl Linnaeus
- Flora of Subarctic America
- Flora of Northern Canada
- Flora of Alaska
- Flora of Norway
- Flora of Finland
- Flora of Siberia
- Flora of Northern America
- Flora without expected TNC conservation status
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
