Bouteloua aristidoides var. arizonica

M.E. Jones
Common names: Arizona needle grama
Treatment appears in FNA Volume 25. Treatment on page 257.

Panicle branches 15-35 mm to the base of the terminal spikelets and extending an additional 1.5-5 (7) mm, with 6-10 spikelets.

Discussion

Bouteloua aristidoides var. arizonica grows in the same kind of habitats as var. aristidoides, but only from 500-800 m. It has a more restricted range than B. aristidoides var. aristidoides (which extends into northern Mexico), being known only from New Mexico, Arizona, and Chihuahua, Mexico. In its extreme form, var. arizonica is very different from var. aristidoides, but the two varieties do intergrade.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

yellow and red +  and yellow +
1 +  and 3 +
2.5 cm25 mm <br />0.025 m <br /> (?) +
J.K. Wipff +
M.E. Jones +
1 (?) +  and 3 (?) +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
well-developed +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
pubescent +  and glabrous +
folded +  and flat +
0.7mm;2mm +
subdigitate +  and digitate +
75 cm750 mm <br />0.75 m <br /> (?) +
spikelike +
not woody +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Arizona needle grama +
ascending +  and erect +
4 cm40 mm <br />0.04 m <br /> (60 cm600 mm <br />0.6 m <br />) +
not woody +
Ariz. +  and N.Mex. +
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 +
unequal +
papillose-based +
uncinate +
paniculate +  and racemose +
hollow +  and solid +
not absent +
5-veined +, 7-13-veined +  and 1-3-veined +
acuminate +
0.58 cm5.8 mm <br />0.0058 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
sometimes longer +
ciliate +  and lacerate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
membranous +
inconspicuous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
extended +
concealed +  and prominent +
2 +  and 1 +
1.5 cm15 mm <br />0.015 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (10.5 cm105 mm <br />0.105 m <br />) +
dry +  and fleshy +
spikelike +
elongate +
flabellate +
sessile +  and subsessile +
2 +  and 10 +
terete +, compressed +  and pectinate +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Bouteloua aristidoides var. arizonica +
Bouteloua aristidoides +
variety +
setaceous +  and sharp +
membranous +
pubescent +  and glabrous +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
7 +  and 13 +
extended +
rhizomatous +  and stoloniferous +
aquatic +  and terrestrial +