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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
from FNA
AL; AR; FL; GA; LA; MO; MS; NC; OK; SC; TN; TX
[BONAP county map]
from FNA
AL; AR; DE; FL; GA; IL; KY; LA; MA; MD; MO; MS; NC; NJ; OH; OK; SC; TN; TX; VA; WV
[WildflowerSearch map]
[BONAP county map]
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
E. airoides, E. amabilis, E. atrovirens, E. bahiensis, E. barrelieri, E. capillaris, E. cilianensis, E. ciliaris, E. cumingii, E. curtipedicellata, E. curvula, E. cylindriflora, E. echinochloidea, E. elliottii, E. elongata, E. erosa, E. frankii, E. gangetica, E. hirsuta, E. hypnoides, E. intermedia, E. japonica, E. lehmanniana, E. lutescens, E. mexicana, E. minor, E. obtusiflora, E. palmeri, E. pectinacea, E. pilosa, E. plana, E. polytricha, E. prolifera, E. refracta, E. reptans, E. scaligera, E. secundiflora, E. sessilispica, E. setifolia, E. silveana, E. spectabilis, E. spicata, E. superba, E. swallenii, E. tef, E. trichodes, E. trichophora, E. unioloides
E. airoides, E. amabilis, E. atrovirens, E. bahiensis, E. barrelieri, E. capillaris, E. cilianensis, E. ciliaris, E. cumingii, E. curtipedicellata, E. curvula, E. cylindriflora, E. echinochloidea, E. elliottii, E. elongata, E. erosa, E. frankii, E. gangetica, E. hypnoides, E. intermedia, E. japonica, E. lehmanniana, E. lugens, E. lutescens, E. mexicana, E. minor, E. obtusiflora, E. palmeri, E. pectinacea, E. pilosa, E. plana, E. polytricha, E. prolifera, E. refracta, E. reptans, E. scaligera, E. secundiflora, E. sessilispica, E. setifolia, E. silveana, E. spectabilis, E. spicata, E. superba, E. swallenii, E. tef, E. trichodes, E. trichophora, E. unioloides
Synonyms E. hirsuta var. laevivaginata
Name authority Nees (Michx.) Nees
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