×agropogon

P. Fourn.
Treatment appears in FNA Volume 24. Treatment on page 379, 668.
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FNA24 P256A xAgropogon pg 669.jpeg×agropogon lutosusCindy Roché

Plants perennial; loosely cespitose to spreading, rhizomatous. Culms 8-60 cm, usually branched below, ascending from a decumbent base or the lower nodes geniculate. Sheaths smooth, open; auricles absent; ligules membranous, puberulent, acute to obtuse, often bifid or denticulate with age; blades usually glabrous, sometimes scabrous. Inflorescences panicles, moderately dense to very dense, often interrupted; disarticulation tardy, below the glumes. Spikelets laterally compressed, with 1 floret. Glumes similar, narrowly oblong to elliptic, 1-veined, apices notched, midveins extending into a short awn; calluses glabrous; lemmas shorter than the glumes, inconspicuously 5-veined, awned from just below the minutely toothed apices; paleas about 3/4 i as long as the lemmas; anthers usually indehiscent. x = 7.

Distribution

Wash., Calif., La., N.Mex., Ala., Tex.

Discussion

×Agropogon comprises hybrids between Agrostis and Polypogon; one hybrid grows in the Flora region.

"decumbent" is not a number.

... more about "×agropogon"
membranous +  and scarious +
indehiscent +
toothed +  and notched +
Mary E. Barkworth +
P. Fourn. +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
not evident +
cross +, linear +  and narrowly lanceolate +
spikelike +
8 cm80 mm <br />0.08 m <br /> (60 cm600 mm <br />0.6 m <br />) +
not woody +
Wash. +, Calif. +, La. +, N.Mex. +, Ala. +  and Tex. +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
sterile +  and bisexual +
compressed +
reduced +
shorter or longer +
subtending +
narrowly oblong +  and elliptic +
unequal +
uncinate +
lanceolate +  and ovate +
denticulate +, bifid +, acute +  and obtuse +
membranous +
inconspicuous +
lanceolate +
concealed +  and prominent +
2 +  and 1 +
hairy +  and glabrous +
well-developed +
2-keeled +
spikelike +
dry +  and fleshy +
rugolo1997b +
1 +  and 60 +
compressed +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
×agropogon +
Poaceae tribe Poeae +
membranous +
parallel +  and converging +
plant +  and cespitose +
aquatic +  and terrestrial +