Eragrostis trichodes
Eragrostis unioloides
sand lovegrass
Chinese lovegrass
30-120 (160) cm, erect, glabrous and non-glandular below the nodes.
10-50 cm, erect, glabrous below the nodes.
sometimes villous along the margins, apices hairy, hairs to 5 mm;
ligules 0.3-0.5 mm;
blades 15-46(65) cm long, 1.5-8 mm wide, flat to involute, abaxial surfaces glabrous, adaxial surfaces scabridulous, sometimes also pilose on the basal 1/4, hairs to 4 mm.
mostly basal;
sheaths mostly glabrous, apices pilose, hairs 0.4-3 mm;
ligules 0.1-0.2 mm, ciliate;
blades (1.8)5-12 cm long, 2-6 mm wide, flat to involute, abaxial surfaces glabrous, adaxial surfaces scabridulous and glabrous or sparsely hairy, hairs appressed.
30-80 cm long, 6-30 cm wide, oblong to ovoid, diffuse;
primary branches 2-35 cm, diverging 20-90° from the rachises, naked basally;
pulvini hairy or glabrous;
pedicels 2-22 cm, diverging, capillary.
6-15 cm long, 0.5-7 cm wide, ovate, open to contracted;
primary branches 0.2-5 cm, appressed or diverging up to 70° from the rachises, glabrous;
pulvini glabrous;
pedicels 2-8 mm, glabrous.
3-15 mm long, 1.5—3.6 mm wide, ovate to lanceolate, greenish-yellow with a reddish-purple tinge, with (2)4-18 florets;
disarticulation acropetal, paleas persistent.
4-8(10) mm long, (1.6)2-4 mm wide, ovate-lanceolate, loosely imbricate, straw-colored to purplish, with 12-42 florets;
disarticulation acropetal, paleas not persistent, rachillas persistent.
subequal, 1.8-4 mm, narrowly ovate to linear-lanceolate, membranous, apices acuminate;
upper glumes as long as or longer than the basal lemmas;
lemmas 2.2-3.5 mm, broadly ovate to lanceolate, membranous, strongly keeled, keels not glandular, lateral veins conspicuous, apices acute;
paleas 1.8-2.8 mm, hyaline, narrower than the lemmas, keels ciliolate, apices obtuse to truncate;
anthers 3, 1-1.6 mm, purplish.
ovate-lanceolate to lanceolate, hyaline to membranous;
lower glumes 1-1.8 mm;
upper glumes 1-2.2 mm;
lemmas 1.5-1.9 mm, broadly ovate, membranous, lateral veins raised, apices obtuse to acute;
paleas 1.4-1.9 mm, hyaline, keels scabridulous, apices acute to obtuse;
anthers 2, 0.2-0.4 mm, purplish.
0.8-1.3 mm, rectangular-prismatic, somewhat laterally compressed, with a wide, deep adaxial groove, faintly striate, opaque, dark reddish-brown.
0.6-0.9 mm, ellipsoid, laterally compressed, not grooved, smooth, light brown.
= 40.
= 20, ca. 30.
Eragrostis trichodes
Eragrostis unioloides
Eragrostis trichodes grows in sandy to gravelly prairies, open sandy woods, rocky slopes, and roadsides, at 100-2150 m, often in associations with Quercus marilandica, Q. stellata, Juniperus, and Redfieldia flexuosa. It is endemic to the contiguous United States, and is available commercially as an ornamental. Records from outside the primary range probably reflect introductions.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Eragrostis unioloides is an Asian species that is now established in the southeastern United States, growing along roadsides and in disturbed ground, at 20-150 m.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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