Eragrostis intermedia
Eragrostis erosa
plains lovegrass
Chihuahua lovegrass, Chihuahuan lovegrass
(30)40-90(110) cm, erect, glabrous below the nodes.
70-110 cm, erect, glabrous below the nodes.
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.
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.
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.
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.
3-7 mm long, 1-1.8 mm wide, narrowly lanceolate, olivaceous to purplish, with (3)5-11 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.
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.
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.
0.5-0.9 mm, rectangular-prismatic, somewhat laterally compressed, with a well-developed adaxial groove, striate, opaque, reddish-brown.
0.8-1.6 mm, subellipsoid, terete to somewhat laterally compressed, with a well-developed adaxial groove, faintly striate, opaque, reddish-brown.
= ca. 54, 60, 72, ca. 74, 80, 100, 120.
= unknown.
Eragrostis intermedia
Eragrostis erosa
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 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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