Eragrostis echinochloidea

Stapf
Common names: Tickgrass
Treatment appears in FNA Volume 25. Treatment on page 87.

Plants perennial; cespitose, with innovations. Culms 30-100 cm, erect to geniculate, with narrow, sunken glandular bands. Sheaths sometimes glandular, apices hairy, hairs to 5 mm; ligules 0.4-1 mm; blades 5-21 cm long, 2-6 (7) mm wide, flat to involute, with small crateriform glands on the keels and veins, sparsely pilose adaxially. Panicles 4-19 cm long, 0.8-7 cm wide, oblong to ovate, glomerate, spikelets clustered in 1-sided groups; primary branches 0.5-7.5 cm, diverging 10-90° from the rachises, angled, sinuous, glandular; pulvini hairy, hairs to 2 mm; pedicels 0.2-2 mm, stout, erect, without a narrow band or abscission line near the apices. Spikelets 2-5 mm long, 2-3.5 mm wide, broadly ovate, greenish, stramineous to plumbeous, with 7-14 florets; disarticulation basipetal, glumes persistent. Glumes subequal, 1.7-2.2 mm, ovate, membranous, keels with small crateriform glands, apices acute to acuminate; lemmas 1.8-2.3 mm, broadly ovate to orbicular, chartaceous, keels with small crateriform glands, apices acute to obtuse; paleas 1.7-2.2 mm, chartaceous, each side with a broad wing at the base, wings often projecting beyond the lemma bases, apices acute; anthers 3, 0.5-0.9 mm, yellowish. Caryopses 0.8-1.1 mm, ellipsoid, reddish-brown. 2n = 30.

Discussion

Eragrostis echinochloidea is native to southern Africa. It is now established in Arizona, growing in gravel soils, often along roadsides and in sidewalks, from 700-1000 m. It has also been found in Prince George's County, Maryland.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Eragrostis echinochloidea"
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
Acute (?) +  and Obtuse (?) +
Paul M. Peterson +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
not +  and glabrous +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
5 cm50 mm <br />0.05 m <br /> (21 cm210 mm <br />0.21 m <br />) +
flat +  and involute +
2mm;6mm +
not disarticulating +
not spikelike +
pubescent +  and glabrous +
reddish-brown +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Tickgrass +
branched +, simple +  and rooting +
geniculate +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +
not woody +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
7 +  and 14 +
round +  and compressed +
reduced +
crateriform +
persistent +
shorter or longer +
subtending +
subequal +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
membranous +
uncinate +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
paniculate +  and racemose +
hollow +  and solid +
not absent +
(1)3(5)-veined +
broadly ovate +  and orbicular +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
sometimes longer +
ciliate +  and ciliolate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
membranous +
abscission +
inconspicuous +
concealed +  and prominent +
2 +  and 1 +
persistent +
2-keeled +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
4cm +  and 19cm +
oblong +  and ovate +
0.8 cm8 mm <br />0.008 m <br /> (7 cm70 mm <br />0.07 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
dry +  and fleshy +
0.5 cm5 mm <br />0.005 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
spikelike +
stramineous +  and plumbeous +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1 +  and 60 +
2mm +  and 3.5mm +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Eragrostis echinochloidea +
Eragrostis +
species +
membranous +
7 +  and 13 +
rhizomatous +  and stoloniferous +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +  and synoecious +