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plains lovegrass

hairyflower lovegrass

Habit Plants perennial; cespitose, with innovations, without rhizomes, not glandular. Plants perennial; cespitose, stoloniferous, forming innovations near the base.
Culms

(30)40-90(110) cm, erect, glabrous below the nodes.

30-70 cm, erect, geniculate, or prostrate, often rooting at the lower nodes, glabrous, with a ring of glands below the nodes.

Sheaths

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.

glabrous or with scattered papillose-based hairs over most of the surface, apices pilose, hairs 1-4 mm, a ring of oblong glands sometimes present below the collar;

ligules 0.2-0.5 mm;

blades 1.4-10 cm long, 2-3 mm wide, flat to involute, sparsely hairy with papillose-based hairs, abaxial surfaces often with glandular dots.

Panicles

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.

5-20 cm long, 2-7 cm wide, narrowly ovate, open;

primary branches 2-7 cm, diverging 10-70° from the rachises, lowest branches whorled, naked proximally, bases with a glandular band;

pulvini hairy;

pedicels 0.3-3.3 mm, glandular.

Spikelets

3-7 mm long, 1-1.8 mm wide, narrowly lanceolate, olivaceous to purplish, with (3)5-11 florets;

disarticulation acropetal, paleas persistent.

4-5.4 mm long, 1-1.5 mm wide, linear-lanceolate, plumbeous to greenish-gray, with 3-5 florets;

disarticulation acropetal, paleas persistent.

Glumes

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.

subequal, 1.4-1.8 mm, ovate-lanceolate, membranous;

lemmas 1.5-1.8 mm, ovate, membranous, often hyaline, lateral veins inconspicuous, apices obtuse to acute;

paleas 1.3-1.7 mm, hyaline, bases not projecting beyond the lemmas, apices obtuse;

anthers 3, 0.7-1 mm, purplish.

Caryopses

0.5-0.9 mm, rectangular-prismatic, somewhat laterally compressed, with a well-developed adaxial groove, striate, opaque, reddish-brown.

0.6-0.8 mm, ovoid, terete to dorsally compressed, shallowly grooved adaxially, translucent, mostly whitish to light brown, bases often greenish.

2n

= ca. 54, 60, 72, ca. 74, 80, 100, 120.

= unknown.

Eragrostis intermedia

Eragrostis trichophora

Distribution
from FNA
AL; AR; AZ; CA; FL; GA; KS; LA; MA; ME; MO; MS; NC; NM; OK; SC; TN; TX; VA
[WildflowerSearch map]
[BONAP county map]
from FNA
MD
[BONAP county map]
Discussion

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 trichophora is native to Africa, where it often grows in moist, disturbed or overgrazed sites. It has been collected from disturbed sites at Canton, Maryland.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 25, p. 97. FNA vol. 25, p. 76.
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. 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
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. 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. unioloides
Synonyms E. atherstonei
Name authority Hitchc. Coss. & Durieu
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