Poa pratensis

Ættkvísl
Poa
Nafn
pratensis
Ssp./var
ssp. alpigena
Höfundur undirteg.
(Fries ex Blitt) Hiitonen
Íslenskt nafn
Vallarsveifgras
Ætt
Poaceae (Grasaætt)
Samheiti
Poa alpigena Lindman, Sv. Fanerogamfl. 91. 1918; P. pratensis var. alpigena Blytt, nom. illeg. superfl.; P. pratensis var. contracta Keng; P. pratensis var. iantha Laestadius.
Lífsform
Fjölær grastegund
Kjörlendi
Mountain meadows and mires, alpine grasslands, fertilized areas, homefields, disturbed areas.
Blómgunartími
Júní-júlí
Hæð
0.1 - 0.7 m
Vaxtarlag
Plantan græn eða með fjólubláum blæ og grönnum jarðrenglum, 10-70 sm á hæð.
Lýsing
Leaf sheaths smooth, glabrous; blades flat or more often folded, 2–5 cm × 0.6–2(–3) mm, surfaces and margins slightly scabrid or smooth, adaxially frequently sparsely hairy, of tillers often curved upward, to 12 cm; ligules 0.8–2.5 mm, abaxially smooth or sparsely scabrid. Panicle loosely contracted or eventually open, erect, 5–10(–20) × 1–3.5(–5) cm; branches spreading at anthesis, slightly flexuous, 2–4 per node, slender, smooth or sparsely scabrid, longest 1.5–4 cm, with 9–15 spikelets in distal 1/2. Spikelets purple-violet, 3–5 mm, florets 2 or 3; glumes subequal, lower glume 2–3.5 mm, upper glume 2.5–4 mm; lemmas ovate, 3.3–4.3 mm, keel villous for 2/3 of length, marginal veins for 1/2, intermediate veins glabrous or sparsely pilulose to short villous; palea smooth or proximally with sparse hooks between keels, keels scabrid, sometimes medially pilulose. Anthers (1.2–)1.3–1.8 mm. Fl. and fr. Jul–Aug. 2n = 28, 35, 42, 56, 63, 70, 74–78, 84.
Heimildir
9, HKr, http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=242339053
Útbreiðsla
Common all over Iceland Önnur náttúruleg heimkynni t.d.: Asía, Evr´pa, N og S Ameríka.