×elyhordeum montanense

(Scribn. ex Beal) Bowden
Synonyms: Hordeum montanense
Treatment appears in FNA Volume 24. Treatment on page 286.

Culms 60-100 cm. Sheaths glabrous; blades 5-8 mm wide, flat, lax. Inflorescences spikelike, 8-17 cm, nodding, with 3 spikelets per node. Spikelets with 1-4 florets, the lateral spikelets usually shortly pedicellate, with 1 (2) sterile florets, the central spikelet sessile, with 2 (3-4) sterile florets, the third and fourth florets rudimentary. Glumes 10-35 mm including the awns, slightly widened above the base; lowest lemma of central florets about 8 mm, glabrous towards the base, sparsely scabrous distally, awned, awns 15-25 mm, straight to slightly divergent at maturity. 2n = 28.

Distribution

N.Dak., Nebr., N.S., Que., Mont., Ill., Iowa, Oreg., S.Dak., Idaho, Wyo.

Discussion

×Elyhordeum montanense applies to hybrids between Elymus virginicus and Hordeum jubatum. It is often found in disturbed areas where both parental taxa grow. Short-awned specimens may reflect the involvement of E. submuticus rather than E. virginicus, two taxa that have sometimes been treated as conspecific.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "×elyhordeum montanense"
membranous +  and scarious +
toothed +, lobed +  and entire +
Mary E. Barkworth +
(Scribn. ex Beal) Bowden +
1 (?) +  and 3 (?) +
straight +
basal +  and apical +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
not evident +
cross +, linear +  and narrowly lanceolate +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
spikelike +
hairy +  and glabrous +
not branching +
60 cm600 mm <br />0.6 m <br /> (100 cm1,000 mm <br />1 m <br />) +
not woody +
N.Dak. +, Nebr. +, N.S. +, Que. +, Mont. +, Ill. +, Iowa +, Oreg. +, S.Dak. +, Idaho +  and Wyo. +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
8 cm80 mm <br />0.08 m <br /> (?) +
rudimentary +
2 +, 1 +  and 4 +
laterally compressed +  and terete +
shorter than to longer than the adjacent florets +
subtending +
subulate +  and narrowly lanceolate +
unequal +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
widened +
uncinate +
8 cm80 mm <br />0.08 m <br /> (17 cm170 mm <br />0.17 m <br />) +
solid +  and hollow +
keeled +, lanceolate +  and rectangular +
stiffly membranous +  and coriaceous +
inconspicuous +
lanceolate +
fleshy +  and membranous +
concealed +  and prominent +
2 +  and 1 +
hairy +  and glabrous +
well-developed +
slightly longer +
subequal +
dry +  and fleshy +
spikelike +
spikelike +
subsessile +  and sessile +
bisexual +  and sterile +
terete +  and compressed +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
not papillate +
Hordeum montanense +
×elyhordeum montanense +
×elyhordeum +
species +
membranous +
inconspicuous +
plant +  and cespitose +
aquatic +  and terrestrial +