Hordeum brachyantherum

Nevski
Synonyms: Hordeum nodosum Critesion brachyantherum
Treatment appears in FNA Volume 24. Treatment on page 243.

Plants perennial; loosely to densely cespitose. Culms to 90 cm, erect to geniculate, not bulbous; nodes glabrous. Sheaths glabrous or densely pubescent; auricles absent; blades to 19 cm long, to 8 mm wide, glabrous or with hairs on both surfaces, hairs sometimes of mixed lengths. Spikes 3-8.5 cm, green to somewhat purple. Glumes 7-19 mm, ascending to slightly divergent at maturity. Central spikelets: glumes 9-19 mm long, about 0.2 mm wide, setaceous throughout, rarely flattened near the base; lemmas 5.5-10 mm, usually glabrous, rarely pubescent, awned, awns 3.5-14 mm; anthers 0.8-4 mm. Lateral spikelets staminate; glumes 7-19 mm, setaceous; lower glumes sometimes flattened near the base; lemmas rudimentary to well developed, awns to 7.5 mm, rarely absent; anthers 0.8-4 mm. 2n = 14, 28, 42.

Distribution

Wash., Pacific Islands (Hawaii), Wyo., N.H., N.J., N.Mex., Tex., N.Y., Pa., Oreg., Alta., B.C., Nfld. and Labr., Que., Sask., Yukon, Nev., Colo., Alaska, Ill., Ind., Ariz., Calif., Idaho, Maine, Md., Ohio, Utah, Mo., Mont., Miss.

Discussion

Hordeum brachyantherum is native to the Kamchatka Peninsula and western North America, and has been introduced to a few locations in the eastern United States. There is also a small disjunct population in Newfoundland and Labrador that Baum (1978) identified as H. secalinum. Hordeum brachyantherum grows in salt marshes, pastures, woodlands, subarctic woodland meadows, and subalpine meadows.

Selected References

None.

Key

1 Basal sheaths usually glabrous, sometimes sparsely pubescent; anthers 0.8-3.5 mm long; culms often robust, sometimes slender Hordeum brachyantherum subsp. brachyantherum
1 Basal sheaths usually densely pubescent; anthers 1.1-4 mm long; culms usually slender Hordeum brachyantherum subsp. californicum

"decumbent" is not a number.

... more about "Hordeum brachyantherum"
42 +, 28 +  and 14 +
membranous +  and scarious +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
toothed +, lobed +  and entire +
Roland von Bothmer +, Claus Badenf +  and Niels H. Jacobsen +
Nevski +
1 (?) +  and 3 (?) +
basal +  and apical +
0 cm0 mm <br />0 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
0 cm0 mm <br />0 m <br /> (19 cm190 mm <br />0.19 m <br />) +
not evident +
with hairs +  and glabrous +
flat +  and more or less involute +
0 cm0 mm <br />0 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
spikelike +
hairy +  and glabrous +
pedicellate +  and sessile +
not bulbous +
geniculate +
0 cm0 mm <br />0 m <br /> (90 cm900 mm <br />0.9 m <br />) +
not woody +
Wash. +, Pacific Islands (Hawaii) +, Wyo. +, N.H. +, N.J. +, N.Mex. +, Tex. +, N.Y. +, Pa. +, Oreg. +, Alta. +, B.C. +, Nfld. and Labr. +, Que. +, Sask. +, Yukon +, Nev. +, Colo. +, Alaska +, Ill. +, Ind. +, Ariz. +, Calif. +, Idaho +, Maine +, Md. +, Ohio +, Utah +, Mo. +, Mont. +  and Miss. +
liquid +, soft +  and hard +
capillary +
sessile +  and pedicellate +
laterally compressed +  and terete +
reduced +
shorter than to longer than the adjacent florets +
9mm +  and 19mm +
subtending +
setaceous +  and flattened +
unequal +
0.7 cm7 mm <br />0.007 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
uncinate +
solid +  and hollow +
bisexual +  and sterile +
rudimentary +
pubescent +  and glabrous +
0.55 cm5.5 mm <br />0.0055 m <br /> (1 cm10 mm <br />0.01 m <br />) +
stiffly membranous +  and coriaceous +
inconspicuous +
lanceolate +
fleshy +  and membranous +
concealed +  and prominent +
2 +  and 1 +
hairy +  and glabrous +
well-developed +
slightly longer +
keeled +  and ovate +
subequal +
straight +  and curved +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
dry +  and fleshy +
spikelike +
pubescent +  and glabrous +
3 cm30 mm <br />0.03 m <br /> (8.5 cm85 mm <br />0.085 m <br />) +
disarticulating +  and sessile +
bisexual +  and sterile +
terete +  and compressed +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
not papillate +
Hordeum nodosum +  and Critesion brachyantherum +
Hordeum brachyantherum +
species +
membranous +
inconspicuous +
perennial +  and winter-annual +
plant +  and cespitose +
aquatic +  and terrestrial +