Bothriochloa springfieldii

(Gould) Parodi
Common names: Springfield bluestem
Synonyms: Andropogon springfieldii
Treatment appears in FNA Volume 25. Treatment on page 644.

Culms 30-80 cm, erect, unbranched; nodes prominently bearded, hairs 3-7 mm, spreading, silvery-white. Leaves mostly basal; ligules 1-2.5 mm; blades 5-30 cm long, 2-3 (5) mm wide, flat to folded, glabrous or sparsely hispid adaxially, pilose near the throat. Panicles 4-9 cm, oblong to fan-shaped; rachises 1-5 cm, with 2-9 branches; branches 4-8 cm, longer than the rachises, with 1 (2) rames; rame internodes with a membranous groove wider than the margins, margins densely white-villous, hairs 5-10 mm, obscuring the sessile spikelets. Sessile spikelets 5.5-8.5 mm, lanceolate; lower glumes densely short-pilose on the lower M, sometimes with a dorsal pit; awns 18-26 mm; anthers 1-1.5 mm. Pedicellate spikelets 3.5-5.5 mm, sterile. 2n = 120.

Distribution

Colo., N.Mex., Tex., La., Utah, Ariz.

Discussion

Bothriochloa springfieldii grows in rocky uplands, ravines, plains, sandy areas, and roadsides, from southern Utah to western Texas and Mexico at 900-2500 m. and, as a disjunct in northwest Louisiana. It differs from B. barbinodis in its less robust habit, narrower blades, longer nodal hairs, and fewer, more hairy panicle branches, and from B. edwardsiana in its pubescent nodes and wider, non-ciliate leaf blades.

Selected References

None.

Lower Taxa

None.

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

0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
anatomy +  and kranz +
Kelly W. Allred +
(Gould) Parodi +
1 (?) +  and 3 (?) +
geniculate +
1.8 cm18 mm <br />0.018 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
pseudopetiolate +
non-radiate +  and radiate +
well-developed +
5 cm50 mm <br />0.05 m <br /> (30 cm300 mm <br />0.3 m <br />) +
pilose +, hispid +  and glabrous +
flat +  and folded +
reduced +
2mm;3mm +
spikelike +
flattened +, lanceolate +  and oblong +
Springfield bluestem +
purple +  and reddish +
30 cm300 mm <br />0.3 m <br /> (80 cm800 mm <br />0.8 m <br />) +
not woody +
Colo. +, N.Mex. +, Tex. +, La. +, Utah +  and Ariz. +
capillary +
sometimes longer +
concealing +
compressed +  and terete +
shorter or longer +
subtending +
compressed +  and rounded +
unequal +
membranous +
silvery-white +
uncinate +
0.5 cm5 mm <br />0.005 m <br /> (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 /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
membranous +
inconspicuous +
white-villous +
complex +  and simple +
concealed +  and prominent +
sessile-pedicellate +
heterogamous +
oblong +  and fan-shaped +
4 cm40 mm <br />0.04 m <br /> (9 cm90 mm <br />0.09 m <br />) +
fused +  and free +
dry +  and fleshy +
elongate +
pedicellate +  and sessile +
in triplets +  and paired +
well-developed +
lanceolate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
1 (?) +  and 3 (?) +
fused +  and free +
2 (?) +  and 3 (?) +
dome--shaped +  and triangular +
Andropogon springfieldii +
Bothriochloa springfieldii +
Bothriochloa +
species +
membranous +
sessile-pedicellate +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +