Bouteloua trifida var. burkii

(Scribn. ex S. Watson) Vasey ex L.H. Dewey
Treatment appears in FNA Volume 25. Treatment on page 264.

Panicle branches ascending to divergent, rarely appressed. Lower glumes 1.7-3.1 mm, veins excurrent for 0.05-0.2 mm, usually not exceeding the apical lobes; upper glumes 1.9-3.2 mm, veins excurrent for 0.05-0.2 mm, usually not exceeding the apical teeth; lower lemmas conspicuously appressed-pubescent across the lower 2/3 - 4/5 and along most or all of the margins, awns 2.2-4.5 mm; anthers 0.2-0.3 mm. Caryopses 0.8-1.2 mm long, 0.5-0.6 mm wide, flat or slightly concave adaxially. 2n = 20.

Discussion

Bouteloua trifida var. burkii grows in southern New Mexico, southern Texas, and adjacent Mexico.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

1 +  and 3 +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
J.K. Wipff +
(Scribn. ex S. Watson) Vasey ex L.H. Dewey +
1 (?) +  and 3 (?) +
well-developed +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.45 cm4.5 mm <br />0.0045 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 +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
concave +  and flat +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-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 +
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 +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.31 cm3.1 mm <br />0.0031 m <br />) +
appressed-pubescent +
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 +
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. burkii +
Bouteloua trifida +
variety +
membranous +
pubescent +  and glabrous +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.32 cm3.2 mm <br />0.0032 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 +