Eriochloa pseudoacrotricha

(Stapf ex Thell.) J.M.
Common names: Vernal cupgrass
Treatment appears in FNA Volume 25. Treatment on page 513.

Plants perennial; cespitose, not rhizomatous. Culms 40-80 cm, erect, not rooting at the lower nodes; internodes glabrous; nodes hairy. Sheaths glabrous, rarely with a few appressed hairs; collars glabrous; ligules 0.4-1 mm; blades 10-20 cm long, 2-4 mm wide, linear, flat, straight, spreading, glabrous or hairy adaxially. Panicles 5-15 cm long, 0.3-1 cm wide; rachises scabrous; branches 2-8, 25-45 mm long, 0.3-0.6 mm wide, divergent to spreading, glabrous, winged, with 2-40 spikelets in unequally pedicellate pairs at the middle of the branches; pedicels 1-3 mm, glabrous, apices hairy. Spikelets 3.6-5.4 mm long, 1.1-1.4 mm wide, lanceolate. Upper glumes 1-1.3 times as long as the lower lemmas, lanceolate, hairy, 5-veined, acuminate, awned, awns 0.5-1.5 mm; lower florets sterile; lower lemmas 3.5-5.2 mm long, 1.1-1.4 mm wide, lanceolate, setose, 5-veined, mucronate to awned; lower paleas absent; upper lemmas 2.1-3.7 mm, elliptic, apices rounded, awned, awns 0.4-0.8 mm; upper paleas indurate, blunt, not rugose. 2n = 36.

Discussion

Eriochloa pseudoacrotricha is an Australian species that has been introduced into south Texas and Mississippi. It grows in waste areas.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."elongated" is not a number."-1.3timesaslongasthelowerlemmas" is not declared as a valid unit of measurement for this property.

anatomy +  and kranz +
Robert B. Shaw +, Robert D. Webster +  and Christine M. Bern +
(Stapf ex Thell.) J.M. +
1 (?) +  and 3 (?) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
disarticulating +  and pseudopetiolate +
non-radiate +  and radiate +
straight +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
hairy +  and glabrous +
usually linear +  and lanceolate occasionally ovate +
2mm;4mm +
25mm +  and 45mm +
spikelike +
0.3mm;0.6mm +
not developed +
terete +  and compressed +
sometimes longer +
Vernal cupgrass +
not rooting +
40 cm400 mm <br />0.4 m <br /> (80 cm800 mm <br />0.8 m <br />) +
well-developed +
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 +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
membranous +
inconspicuous +
3.5mm +  and 5.2mm +
mucronate +  and awned +
1.1mm +  and 1.4mm +
complex +  and simple +
concealed +  and prominent +
2 +  and 5 +
2 +  and 1 +
pedicellate +
5cm +  and 15cm +
subterranean +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
dry +  and fleshy +
elongate +
in triplets +  and paired +
0.36 cm3.6 mm <br />0.0036 m <br /> (0.54 cm5.4 mm <br />0.0054 m <br />) +
subterranean +
2 +  and 40 +
unisexual +  and bisexual +
lanceolate +
1.1mm +  and 1.4mm +
1 (?) +  and 3 (?) +
fused +  and free +
2 (?) +  and 3 (?) +
plumose +
dome--shaped +  and triangular +
Gramineae +
Eriochloa pseudoacrotricha +
Eriochloa +
species +
membranous +
acuminate +  and lanceolate +
rounded +, lanceolate +  and ovate +
0.21 cm2.1 mm <br />0.0021 m <br /> (0.37 cm3.7 mm <br />0.0037 m <br />) +
not pronounced +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +