Bouteloua trifida var. trifida

Treatment appears in FNA Volume 25. Treatment on page 264.

Panicle branches appressed to ascending, occasionally divergent. Lower glumes 2.2-3.4 mm, midveins excurrent for 0.1-0.6 mm; upper glumes 2.7-4 mm, midveins excurrent for 0.2-1 mm; lower lemmas glabrous or sparsely appressed-pubescent along both sides of the veins, awns (3.2) 4-6.6 mm; anthers 0.3-0.4 mm. Caryopses 1.3-1.5 mm long, 0.4-0.5 mm wide, grooved adaxially. 2n = unknown.

Distribution

Utah, Calif., Ariz., Nev., N.Mex., Tex.

Discussion

Bouteloua trifida var. trifida grows in dry plains and rocky slopes, mostly at 300-1500 m, from southern California, Nevada, and Utah to Texas and Mexico.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

1 +  and 3 +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
J.K. Wipff +
Thurb. ex S. Watson +
1 (?) +  and 3 (?) +
3.2 cm32 mm <br />0.032 m <br /> (?) +
well-developed +
0.4 cm4 mm <br />0.004 m <br /> (0.66 cm6.6 mm <br />0.0066 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
0.7 cm7 mm <br />0.007 m <br /> (8 cm80 mm <br />0.08 m <br />) +
pubescent +  and glabrous +
scabridulous +
usually linear +  and lanceolate occasionally ovate +
0.5mm;1.5mm +
subdigitate +  and digitate +
75 cm750 mm <br />0.75 m <br /> (?) +
straight +  and slightly arcuate +
persistent +
appressed;ascending;appressed;ascending;spreading +
spikelike +
not woody +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
geniculate +
slender +
5 cm50 mm <br />0.05 m <br /> (40 cm400 mm <br />0.4 m <br />) +
not woody +
Utah +, Calif. +, Ariz. +, Nev. +, N.Mex. +  and Tex. +
not waisted +
capillary +
pistillate +  and staminate +
4-lobed +  and trilobed +
sometimes longer +
rudimentary +
round +  and compressed +
reduced +
shorter or longer +
subtending +
both +  and 1 +
acuminate +  and acute +
subequal +  and unequal +
not papillose-based +  and papillose-based +
uncinate +
paniculate +  and racemose +
hollow +  and solid +
not absent +
5-veined +, 7-13-veined +  and 1-3-veined +
sometimes longer +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
membranous +
tapering +
membranous +
inconspicuous +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.34 cm3.4 mm <br />0.0034 m <br />) +
appressed-pubescent +  and glabrous +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
appressed-pubescent +
concealed +  and prominent +
2 +  and 1 +
appressed +  and ascending +
3 cm30 mm <br />0.03 m <br /> (9 cm90 mm <br />0.09 m <br />) +
dry +  and fleshy +
spikelike +
elongate +
flabellate +
persistent +
scabridulous +
flattened +
sessile +  and subsessile +
8 +  and 24 +
pectinate +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Bouteloua trifida var. trifida +
Bouteloua trifida +
variety +
membranous +
pubescent +  and glabrous +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
7 +  and 13 +
extended +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
plant +  and cespitose +
aquatic +  and terrestrial +