Bothriochloa wrightii

(Hack.) Henrard
Common names: Wright's bluestem
Treatment appears in FNA Volume 25. Treatment on page 640.

Culms to 70 cm, erect, sparingly branched; nodes glabrous or hirsute, hairs about 1 mm. Leaves cauline, glaucous; ligules 1-2 mm; blades 15-25 cm long, 3-7 mm wide, glabrous. Panicles 5-6 cm, oblong to fan-shaped; rachises 1-3 cm, with 4-5 branches; branches 4-6 cm, lacking axillary pulvini, with 1 rame; rame internodes with stiff, 1-3 mm marginal hairs. Sessile spikelets 5.5-7 mm, lanceolate-elliptic; lower glumes glabrous, usually without a dorsal pit; awns 10-15 mm, twisted, once-geniculate; anthers about 3 mm. Pedicellate spikelets staminate, subequal to the sessile spikelets. 2n = 120.

Discussion

Bothriochloa wrightii grows in rocky grasslands and shrubby slopes of the pine-oak woodlands of southern Arizona, New Mexico, Texas, and northern Mexico, at 1200-1800 m. It was last collected in the United States in 1930. It differs from B. barbinodis in its glaucous foliage, short, fan-shaped panicles, and large, pedicellate spikelets.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."elongated" is not a number.

... more about "Bothriochloa wrightii"
3 cm30 mm <br />0.03 m <br /> (?) +
anatomy +  and kranz +
Kelly W. Allred +
(Hack.) Henrard +
1 (?) +  and 3 (?) +
once-geniculate +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
pseudopetiolate +
non-radiate +  and radiate +
well-developed +
15 cm150 mm <br />0.15 m <br /> (25 cm250 mm <br />0.25 m <br />) +
usually linear +  and lanceolate occasionally ovate +
reduced +
3mm;7mm +
spikelike +
flattened +, lanceolate +  and oblong +
Wright's bluestem +
purple +  and reddish +
0 cm0 mm <br />0 m <br /> (70 cm700 mm <br />0.7 m <br />) +
not woody +
Ariz. +, N.Mex. +  and Tex. +
capillary +
sometimes longer +
concealing +
compressed +  and terete +
shorter or longer +
subtending +
compressed +  and rounded +
unequal +
uncinate +
1 cm10 mm <br />0.01 m <br /> (?) +
bracteate +  and ebracteate +
pedunculate +  and multiple-stalked +
axillary +  and subtending +
solid +  and hollow +
photosynthetic +
not aromatic +
coriaceous +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
membranous +
inconspicuous +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
complex +  and simple +
concealed +  and prominent +
hirsute +  and glabrous +
sessile-pedicellate +
heterogamous +
oblong +  and fan-shaped +
5 cm50 mm <br />0.05 m <br /> (6 cm60 mm <br />0.06 m <br />) +
fused +  and free +
dry +  and fleshy +
elongate +
staminate +, pedicellate +  and sessile +
in triplets +  and paired +
lanceolate-elliptic +
well-developed +
compressed +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1 (?) +  and 3 (?) +
fused +  and free +
2 (?) +  and 3 (?) +
dome--shaped +  and triangular +
Gramineae +
Bothriochloa wrightii +
Bothriochloa +
species +
membranous +
sessile-pedicellate +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +