Eragrostis atrovirens

(Desf.) Trin. ex Steud.
Common names: Thalia lovegrass
Introduced
Treatment appears in FNA Volume 25. Treatment on page 103.

Plants perennial; cespitose, with innovations, without rhizomes, not glandular. Culms (60) 75-130 cm, erect. Sheaths glabrous, apices hairy, hairs to 4 mm; ligules 0.1-0.3 mm; blades (5) 8-20 cm long, (1) 2-3 (4) mm wide, flat to involute, abaxial surfaces glabrous, adaxial surfaces mostly scabridulous, long ciliate basally. Panicles (7) 10-20 (28) cm long, (2.5) 4-15 cm wide, ovate, open; primary branches (3) 5-10 (13) cm, diverging 20-60° from the rachises, wiry, somewhat capillary, naked basally; pulvini glabrous or sparingly hairy, hairs shorter than 2 mm; pedicels 1-10 mm, appressed, scabridulous. Spikelets 5-10 (19) mm long, 1.4-2.4 mm wide, ovatelanceolate, plumbeous to purplish, with 10-22 florets; disarticulation acropetal, glumes first, then the florets. Glumes subequal, lanceolate to ovate, membranous; lower glumes 1.2-1.4 mm, narrower than the upper glumes; upper glumes 1.4-1.7 mm; lemmas (1.5) 1.7-2 mm, broadly ovate, leathery, keels scabridulous, lateral-veins evident, apices acute; paleas 1.4-1.9 mm, hyaline, bases not projecting beyond the lemmas, keels scabridulous, apices acute to obtuse; anthers 3, 0.7-0.9 mm, reddish-purple. Caryopses 0.6-0.9 mm, obovoid to ellipsoid, terete, opaque, somewhat striate, reddish-brown. 2n = 60.

Discussion

Eragrostis atrovirens is native to northern Africa, but it is now established in southeastern United States, where it grows along railways and roads, on beaches and in ditches, often in wet sandy soils and in association with Pinus, Taxodium, and Sabal.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Eragrostis atrovirens"
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
Acute (?) +  and Obtuse (?) +
Paul M. Peterson +
(Desf.) Trin. ex Steud. +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
not +  and glabrous +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
not projecting +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
8 cm80 mm <br />0.08 m <br /> (20 cm200 mm <br />0.2 m <br />) +
pubescent +  and glabrous +
flat +  and involute +
2mm;3mm +
not disarticulating +
not spikelike +
pubescent +  and glabrous +
reddish-brown +  and opaque +
terete +, obovoid +  and ellipsoid +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Thalia lovegrass +
branched +, simple +  and rooting +
geniculate +
75 cm750 mm <br />0.75 m <br /> (130 cm1,300 mm <br />1.3 m <br />) +
not woody +
Fla. +, Ala. +  and Ga. +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
10 +  and 22 +
round +  and compressed +
reduced +
persistent +  and deciduous +
shorter or longer +
subtending +
lanceolate +  and ovate +
subequal +
membranous +
uncinate +
2 cm20 mm <br />0.02 m <br /> (0 cm0 mm <br />0 m <br />) +
paniculate +  and racemose +
hollow +  and solid +
scabridulous +
not absent +
(1)3(5)-veined +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
sometimes longer +
ciliate +  and ciliolate +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
membranous +
inconspicuous +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
concealed +  and prominent +
2 +  and 1 +
persistent +
2-keeled +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
10cm +  and 20cm +
4 cm40 mm <br />0.04 m <br /> (15 cm150 mm <br />0.15 m <br />) +
scabridulous +
0.1 cm1 mm <br />0.001 m <br /> (1 cm10 mm <br />0.01 m <br />) +
dry +  and fleshy +
3 cm30 mm <br />0.03 m <br /> (?) +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
hairy +  and glabrous +
spikelike +
Introduced +
plumbeous +  and purplish +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
1 +  and 60 +
ovatelanceolate +
1.4mm +  and 2.4mm +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Eragrostis atrovirens +
Eragrostis +
species +
membranous +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
7 +  and 13 +
rhizomatous +  and stoloniferous +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +  and synoecious +