familyPoaceae
subfamilyPoaceae subfam. Pooideae
tribePoaceae tribe Poeae
genusHelictotrichon
speciesHelictotrichon sempervirens
Helictotrichon sempervirens
Common names: Blue oatgrass
Synonyms: Avena striata
Treatment appears in FNA Volume 24. Treatment on page 701.
Culms 30-100 (150) cm. Ligules 0.5-1.5 mm, truncate, ciliate; blades 15-60 cm long, 2-4 mm wide, usually convolute and 0.9-1.5 mm in diameter, glaucous, scabridulous, basal blades deciduous when dead. Panicles 8-20 cm; branches ascending, with 3-7 (10) spikelets. Spikelets 10-14 mm, with 3 (5) florets. Glumes subequal to unequal; lower glumes 7-10 mm; upper glumes 10-12 mm; lowest lemmas 7-12 mm, awns about 15 mm; distal lemmas unawned; anthers about 5 mm. 2n = 28, 42.
Discussion
Helictotrichon sempervirens is a native of the southwestern Alps in Europe, where it grows on rocky soils and in stony pastures. In the Flora region, it is frequently grown as an ornamental species; it is not established in the region.
Selected References
None.
Lower Taxa
None.
"decumbent" is not a number.
... more about "Helictotrichon sempervirens"
absent +
common +
absent +
bulliform +
absent +
5 cm50 mm <br />0.05 m <br /> (?) +
absent +
absent +
twisted +
straight +
arising +
single +
15 cm150 mm <br />0.15 m <br /> (?) +
glaucous +
close +
free +
hard +
thick +
parallel +
convolute +
not evident +
ascending +
spikelike +
1 cm10 mm <br />0.01 m <br /> (?) +
developed +
strigose +
acute +
Blue oatgrass +
not branching +
annual +
climbing +
floating +
erect +
not woody +
reduced +
solid +
capillary +
adjacent +
sometimes longer +
distal +
compressed +
reduced +
1-3(5)-veined +
shorter +
shorter or longer +
subtending +
absent +
uncinate +
punctate +
Present +
compound +
hollow +
absent +
absent +
distichous +
3-5-veined +
shorter +
longer +
ciliate-erose +
truncate +
absent +
membranous +
veined +
truncate +
inconspicuous +
lobed +
membranous +
simple +
absent +
pubescent +
well-developed +
shorter +
absent +
2-keeled +
minute +
spikelike +
reduced +
narrow +
absent +
separating +
thin +
not developed +
absent +
prolonged +
pilose +
evident +
open +
closed +
open +
ebracteate +
mixed +
attached +
viviparous +
compressed +
parallel-sided +
Helictotrichon sempervirens +
Helictotrichon +
species +
hyaline +
membranous +
absent +
perennial +