Eragrostis lugens
Eragrostis palmeri
mourning lovegrass
Rio Grande lovegrass
30-70 cm, erect, sometimes geniculate, glabrous below the nodes.
50-90(120) cm, glabrous below the nodes.
usually mostly glabrous, summits hairy, hairs 2-5 mm, never papillose-based;
ligules 0.2-0.3 mm;
blades (4)8-22 cm long, 1-3.5 mm wide, involute to flat, both surfaces glabrous, margins sometimes with scattered hairs, hairs to 7 mm.
villous and the hairs not papillose-based, or mostly glabrous, apices hairy, hairs to 5 mm, not papillose-based;
ligules 0.2-0.4 mm;
blades (14)20-35 cm long, 1-2.4 mm wide, involute, abaxial surfaces glabrous, adaxial surfaces scabridulous, sometimes sparsely hairy.
16-28 cm long, 10-21 cm wide, ovate, open;
primary branches 0.6-15 cm, diverging up to 100° from the rachises, naked basally;
pulvini hairy;
pedicels 1.4-5(7) mm, diverging, wiry, present on all spikelets.
12-40 cm long, 4-20 cm wide, oblong, open;
primary branches 2-20 cm, diverging 20-70° from the rachises, capillary;
pulvini glabrous or sparsely hairy;
pedicels (0.4)1-4(14) mm, appressed or diverging, only the terminal pedicels on each branch longer than 4 mm.
2-4.5(5) mm long, 0.5-1(1.3) mm wide, narrowly lanceolate, plumbeous to reddish-purple, with 2-7 florets;
disarticulation acropetal, paleas persistent.
4-6(7.3) mm long, 1-2 mm wide, linear-lanceolate, plumbeous, with 5-12 florets;
disarticulation acropetal, paleas persistent.
broadly ovate to narrowly lanceolate, hyaline, sometimes reddish-purple;
lower glumes 0.6-1 mm;
upper glumes 1.1-1.4 mm, usually broader than the lower glumes;
lemmas 1.2-1.8 mm, broadly ovate, mostly membranous but the distal margins hyaline, lateral veins inconspicuous, apices acute;
paleas 1.1-1.7 mm, membranous to hyaline, apices obtuse;
anthers 3, 0.2-0.7 mm, reddish-purple.
lanceolate to ovate, hyaline;
lower glumes 1.1-1.8 mm;
upper glumes 1.2-2.2 mm, exceeded by the basal lemmas;
lemmas 2-2.6 mm, ovate, membranous, hyaline towards the apices and margins, keels weak or strong, without glands, lateral veins from inconspicuous to conspicuous, apices acute;
paleas 1.7-2.4 mm, hyaline, bases not projecting beyond the lemmas, apices truncate, often notched;
anthers 3, 0.6-1.3 mm, yellowish to purplish.
0.5-0.6 mm, obovoid to somewhat prism-shaped, terete to somewhat laterally compressed, sometimes with a weak adaxial groove, finely striate, usually opaque, faintly reddish-brown to whitish.
0.6-0.8 mm, rectangular-prismatic to subellipsoid, laterally compressed, with a well-developed adaxial groove, faintly striate, opaque, reddish-brown.
= 40, 80, ca. 108.
= 40.
Eragrostis lugens
Eragrostis palmeri
Eragrostis lugens grows on sandy dunes and along river banks, at 1-300 m. Its range extends from the southern United States to Peru and Argentina.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Eragrostis palmeri grows on rocky slopes and hills between 300-2150 m, generally in association with Pinus edulis, Juniperus monosperma, Bouteloua gracilis, and Prosopis. Its range extends from the southwestern United States into Mexico. It resembles E. erosa, but differs in its shorter lemmas and caryopses.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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