Poa fendleriana subsp. albescens

(Hitchc.) Soreng
Treatment appears in FNA Volume 24. Treatment on page 556.
Please click on the illustration for a higher resolution version.
Illustrator: Sandy Long

Copyright: Utah State University

Collars often scabrous or hispidulous near the throat; ligules of middle cauline leaves 0.2-1.5 mm, smooth or scabrous, margins not decurrent, apices truncate, scabrous, ciliolate, or glabrous; innovation blades frequently glabrous adaxially. Rachilla internodes smooth, glabrous. Lemmas glabrous or the keels and marginal veins sparsely short-villous to softly puberulent. 2n = 28+11, 56.

Discussion

Poa fendleriana subsp. albescens is endemic to the northern Sierra Madre Occidental, extending from the southwestern United States to Chihuahua and Sonora, Mexico. It grows mainly in upland forest openings. It intergrades with subsp. fendleriana where sexual populations have come into contact. Intermediate, pistillate populations with sparsely hairy lemmas are common in southeastern Arizona, and infrequent in southwestern New Mexico.

Selected References

None.

Lower Taxa

None.

"thin" is not a number."reduced" is not a number.No values specified."decumbent" is not a number.

membranous +  and scarious +
hairy +, hispidulous +  and scabrous +
5 cm50 mm <br />0.05 m <br /> (?) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
scarious-hyaline +
reduced +
glabrous +, ciliolate +  and scabrous +
acute +, prow--shaped +, truncate +  and acuminate +
Robert J. Soreng +
(Hitchc.) Soreng +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
keeled +  and rounded +
strigose +  and glabrous +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
compressed +  and terete +
swelling +
not evident +
involute +, folded +  and flat +
hispidulous +, glabrous +, scabrous +  and smooth +
terete +  and weakly angled +
1 cm10 mm <br />0.01 m <br /> (8 cm80 mm <br />0.08 m <br />) +
compressed +  and terete +
folded +  and flat +
hispidulous +  and scabrous +
unbranched +  and hollow +
compressed +  and terete +
15 cm150 mm <br />0.15 m <br /> (70 cm700 mm <br />0.7 m <br />) +
not woody +
Colo. +, Ariz. +, Idaho +, Mont. +, N.Mex. +, Nev. +, Okla. +, Oreg. +, S.Dak. +, Utah +, Wash. +, Wyo. +, Tex. +, Alta. +, B.C. +, Man. +, Calif. +, Nebr. +  and N.Dak. +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
2 +  and 7 +
compressed +
reduced +
2mm +  and 10mm +
1-3(5)-veined +
shorter or longer +
subtending +
keeled +  and lanceolate +
unequal +
distributed +
uncinate +
0 cm0 mm <br />0 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
0 +  and 1/6 +
Oval (?) +  and Round (?) +
milky white +  and slightly greenish +
scabrous +, smooth +, glabrous +  and puberulent +
sparsely short-villous +  and softly puberulent +
puberulent +, long-villous +  and glabrous +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
5-7(11)-veined +
keeled +  and lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
membranous +
erose +  and entire +
colorless +  and milky white +
not +  and decurrent +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
membranous +
inconspicuous +
lobed +  and lanceolate +
milky white +  and slightly greenish +
not decurrent +
sparsely short-villous +  and softly puberulent +
concealed +  and prominent +
0 +  and 1 +
2 +  and 1 +
well-developed +
2-keeled +
subequal +
30 cm300 mm <br />0.3 m <br /> (?) +
narrowly lanceoloid +  and ovoid +
2 cm20 mm <br />0.02 m <br /> (12 cm120 mm <br />0.12 m <br />) +
dry +  and fleshy +
pubescent +, glabrous +, scabrous +  and smooth +
rhizomatous +  and stoloniferous +
not bulbiferous +
3 +  and 15 +
compressed +, broadly lanceolate +  and ovate +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Poa fendleriana subsp. albescens +
Poa fendleriana +
subspecies +
membranous +
5-veined +  and 3-veined +
parallel +  and converging +
aquatic +  and terrestrial +