Eriochloa sericea

(Scheele) Munro ex Vasey
Common names: Texas cupgrass
Treatment appears in FNA Volume 25. Treatment on page 508.

Plants perennial; cespitose, shortly rhizomatous. Culms 30-130 cm, erect or decumbent, sometimes rooting at the lower nodes; internodes pubescent; nodes puberulent to densely pubescent. Sheaths 3-14 cm, not overlapping, frequently inflated or spreading from the culm, chartaceous, glabrous or pubescent; ligules 0.5-1.5 mm, densely ciliate; blades 10-30 cm long, 0.5-4 mm wide, filiform to linear, involute to flat, straight or lax, appressed to divergent, glabrous or with soft pubescence. Panicles 4-20 cm long, 0.5-1.5 cm wide, contracted; rachises pilose or villous; branches (2) 4-8 (10), 10-35 mm long, 0.4-0.7 mm wide, velutinous, sometimes winged, with 10-20 solitary spikelets; pedicels 0.4-0.7 mm, densely hirsute with a mixture of short and long hairs, apices with more than 12 hairs of 1.5-2.5 mm. Spikelets 4-5 mm long, 1.4-1.9 mm wide. Lower glumes absent; upper glumes appressed-pubescent, ovate to elliptic, 5-7-veined, acute, unawned; lower lemmas 3.8-4.8 mm long, 1.5-1.9 mm wide, indurate, elliptic, pubescent to velutinous, 5-7-veined, acute, unawned; lower paleas absent; anthers absent; upper lemmas 2.7-3.6 mm, elliptic, acute, shortly awned, awns 0.1-0.2 mm; upper paleas slightly shorter than the lemmas, indurate, minutely rugose. 2n = 54.

Discussion

Eriochloa sericea usually grows on clay or clay-loam soils in prairies, roadsides, or protected areas. It is widespread in the blackland prairie and Edwards Plateau of Texas, but extends into Kansas, Nebraska, and Oklahoma, and onto the coastal prairie and rolling plains of Texas and northern Mexico.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."elongated" is not a number.

... more about "Eriochloa sericea"
anatomy +  and kranz +
Robert B. Shaw +, Robert D. Webster +  and Christine M. Bern +
(Scheele) Munro ex Vasey +
1 (?) +  and 3 (?) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
disarticulating +  and pseudopetiolate +
straight +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
with soft pubescence +  and glabrous +
filiform +  and linear involute +
0.5mm;4mm +
10mm +  and 35mm +
spikelike +
0.4mm;0.7mm +
not developed +
terete +  and compressed +
sometimes longer +
Texas cupgrass +
decumbent +  and erect +
30 cm300 mm <br />0.3 m <br /> (130 cm1,300 mm <br />1.3 m <br />) +
well-developed +
Kans. +, Okla. +  and Tex. +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
unequal +
membranous +
uncinate +
bracteate +  and ebracteate +
solid +  and hollow +
cauline +  and basal +
coriaceous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
membranous +
inconspicuous +
3.8mm +  and 4.8mm +
pubescent +  and velutinous +
1.5mm +  and 1.9mm +
complex +  and simple +
concealed +  and prominent +
puberulent +  and densely pubescent +
2 +  and 5 +
2 +  and 1 +
4cm +  and 20cm +
subterranean +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
dry +  and fleshy +
villous +  and pilose +
elongate +
not overlapping +
pubescent +, glabrous +  and chartaceous +
inflated +
3 cm30 mm <br />0.03 m <br /> (14 cm140 mm <br />0.14 m <br />) +
in triplets +  and paired +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
subterranean +
10 +  and 20 +
unisexual +  and bisexual +
compressed +  and terete +
1.4mm +  and 1.9mm +
1 (?) +  and 3 (?) +
fused +  and free +
2 (?) +  and 3 (?) +
plumose +
dome--shaped +  and triangular +
Gramineae +
Eriochloa sericea +
Eriochloa +
species +
membranous +
appressed-pubescent +
acute +, ovate +  and elliptic +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
not pronounced +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +