Eragrostis lugens |
Eragrostis hirsuta |
|
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mourning lovegrass |
bigtop lovegrass |
|
Habit | Plants perennial; cespitose, with innovations, without rhizomes, not glandular. | Plants perennial; cespitose, with innovations and hardened bases, without rhizomes, not glandular. |
Culms | 30-70 cm, erect, sometimes geniculate, glabrous below the nodes. |
(30)45-100 cm, erect, glabrous below the nodes. |
Sheaths | 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. |
rarely glabrous, apices and distal margins usually hairy, sometimes also densely hairy basally, dorsally, and on the collars, hairs to 6 mm, papillose-based; ligules 0.2-0.4 mm; blades 25-60 cm long, 3-8(11) mm wide, flat to loosely involute, usually glabrous, adaxial surfaces sometimes hairy basally. |
Panicles | 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. |
25-85 cm long, 15-40 cm wide, broadly ovate, open; primary branches mostly 4-35(45) cm, diverging 20-90° from the rachises, capillary; pulvini glabrous or hairy; pedicels 2-28 mm, divergent. |
Spikelets | 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. |
2-4(5) mm long, 1-1.7 mm wide, lanceolate, greenish with purplish tinges, with 2-6 florets; disarticulation acropetal, paleas persistent. |
Glumes | 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, hyaline to membranous; lower glumes 1.1-2 mm; upper glumes 1.5-2.8 mm, apices acuminate to acute; lemmas 1.6-2.4 mm, ovate, membranous, hyaline near the margins, lateral veins inconspicuous, apices acute; paleas 1.2-2.2 mm, hyaline, bases not projecting beyond the lemmas, apices acute to obtuse; anthers 3, 0.3-0.8 mm, purplish. |
Caryopses | 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. |
0.8-1 mm, rectangular-prismatic, somewhat laterally compressed, with or without a well-developed adaxial groove, striate, opaque, reddish-brown. |
2n | = 40, 80, ca. 108. |
= 100. |
Eragrostis lugens |
Eragrostis hirsuta |
|
Distribution |
AL; AR; FL; GA; LA; MO; MS; NC; OK; SC; TN; TX |
AL; AR; DE; FL; GA; IL; KY; LA; MA; MD; MO; MS; NC; NJ; OH; OK; SC; TN; TX; VA; WV
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Discussion | 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 hirsuta grows in sandy clay loams on the coastal plain and along roadsides, at 0-150 m, usually in association with Pinus palustris and Quercus. Its range extends from the southeastern United States through eastern Mexico to Guatemala and Belize. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 25, p. 95. | FNA vol. 25, p. 95. |
Parent taxa | Poaceae > subfam. Chloridoideae > tribe Cynodonteae > Eragrostis | Poaceae > subfam. Chloridoideae > tribe Cynodonteae > Eragrostis |
Sibling taxa | ||
Synonyms | E. hirsuta var. laevivaginata | |
Name authority | Nees | (Michx.) Nees |
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