Eragrostis trichodes
Eragrostis erosa
sand lovegrass
Chihuahua lovegrass, Chihuahuan lovegrass
30-120 (160) cm, erect, glabrous and non-glandular below the nodes.
70-110 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.
hairy at the apices and sometimes on the upper margins, hairs to 4 mm, not papillose-based;
ligules 0.2-0.4 mm;
blades (8)12-30 cm long, 1.5-3.8 mm wide, flat to involute, abaxial surfaces glabrous, adaxial surfaces scabridulous, glabrous or sparsely hairy, hairs to 4 mm.
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.
25-45 cm long, (5)12-30 cm wide, broadly ovate, open;
primary branches mostly 4-20 cm, diverging 20-90° from the rachises, capillary, sinuous;
pulvini glabrous or hairy;
pedicels 1-18 mm, appressed or divergent, proximal spikelets on each branch usually with pedicels shorter than 5 mm.
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.
5-9 mm long, 1-3 mm wide, lanceolate, plumbeous, with 5-12 florets;
disarticulation acropetal, glumes first, then the lemmas, paleas 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.
lanceolate to ovate, membranous;
lower glumes 1.3-2.4 mm;
upper glumes 1.6-2.6 mm;
lemmas 2.4-3 mm, ovate, mostly membranous, hyaline near the margins and apices, lateral veins inconspicuous, apices acute;
paleas 1.5-3 mm, hyaline, narrower than the lemmas, apices obtuse to truncate;
anthers 3, 0.6-1.7 mm, purplish.
0.8-1.3 mm, rectangular-prismatic, somewhat laterally compressed, with a wide, deep adaxial groove, faintly striate, opaque, dark reddish-brown.
0.8-1.6 mm, subellipsoid, terete to somewhat laterally compressed, with a well-developed adaxial groove, faintly striate, opaque, reddish-brown.
= 40.
= unknown.
Eragrostis trichodes
Eragrostis erosa
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 erosa grows on rocky slopes and hills, at 1200-2300 m, often in association with Pinus edulis, Juniperus monosperma, and Bouteloua gracilis. Its range extends from New Mexico and western Texas to northern Mexico.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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