Eragrostis intermedia
Eragrostis atrovirens
plains lovegrass
thalia lovegrass
(30)40-90(110) cm, erect, glabrous below the nodes.
(60)75-130 cm, erect.
sparsely pilose on the margins, apices hairy, hairs to 8 mm, not papillose-based;
ligules 0.2-0.4 mm;
blades (4)10-20(30) cm long, 1-3 mm wide, flat or involute, abaxial surfaces glabrous, adaxial surfaces densely hairy behind the ligules, elsewhere usually glabrous, occasionally sparsely hairy.
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.
15-40 cm long, (8.5)15-30 cm wide, ovate, open;
primary branches 4-25 cm, diverging 20-90° from the rachises, capillary;
pulvini hairy or glabrous;
pedicels 2-14 mm, divergent.
(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.
3-7 mm long, 1-1.8 mm wide, narrowly lanceolate, olivaceous to purplish, with (3)5-11 florets;
disarticulation acropetal, paleas persistent.
5-10(19) mm long, 1.4-2.4 mm wide, ovate-lanceolate, plumbeous to purplish, with 10-22 florets;
disarticulation acropetal, glumes first, then the florets.
lanceolate to ovate, hyaline to membranous;
lower glumes 1.1-1.7 mm, narrower than the upper glumes;
upper glumes 1.3-2 mm, apices acuminate to acute;
lemmas 1.6-2.2 mm, ovate, membranous, hyaline near the margins, lateral veins inconspicuous, apices acute;
paleas 1.4-2.1 mm, hyaline, narrower than the lemmas, apices obtuse to acute;
anthers 3, 0.5-0.8 mm, purplish.
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 scabridu-lous, 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.
0.5-0.9 mm, rectangular-prismatic, somewhat laterally compressed, with a well-developed adaxial groove, striate, opaque, reddish-brown.
0.6-0.9 mm, obovoid to ellipsoid, terete, opaque, somewhat striate, reddish-brown.
= ca. 54, 60, 72, ca. 74, 80, 100, 120.
= 60.
Eragrostis intermedia
Eragrostis atrovirens
Eragrostis intermedia grows in clay, sandy, and rocky soils, often in disturbed sites, at 0-1850 m. Its range extends from the United States through Mexico and Central America to South America. Eragrostis intermedia is similar to the more widespread E. lugens, but differs from that species in having wider spikelets, longer lemmas, and caryopses with a prominent adaxial groove.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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