Flora of North America species comparison

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Eragrostis bahiensis

Eragrostis swallenii

bahia lovegrass

Swallen's lovegrass
Habit Plants perennial; cespitose, with innovations, without rhizomes, not glandular. Plants perennial; cespitose, with innovations, without rhizomes.
Culms

25-95(110) cm, erect, glabrous.

35-70 cm, erect, with glandular bands below the nodes.
Sheaths

glabrous, summits hairy, hairs 1-3 mm;

ligules 0.2-0.4 mm;

blades (8)12-40 cm long, 2-5 mm wide, flat to involute, abaxial surfaces glabrous, adaxial surfaces scabridulous and glabrous or long ciliate basally.

hairy on the margins and at the apices, hairs to 4 mm;

ligules 0.2-0.5 mm;

blades (8)10-25(30) cm long, 1.5-4 mm wide, flat to involute, abaxial surfaces glabrous, adaxial surfaces scabridulous, sometimes also sparsely hairy, hairs to 4 mm.
Panicles

terminal, 15-30(45) cm long, (4)8-17 cm wide, narrowly ovate, open to contracted;

primary branches 5-15 cm, diverging 20-90° from the rachises, often capillary, usually naked basally;

pulvini glabrous;

pedicels 0.3-6 mm, mostly appressed, scabridulous, always shorter than the spikelets.

12-30 cm long, 5-16 cm wide, ovate, open, an oblique glandular ring present below the lowest rachis node;

primary branches 2-10 cm, diverging 10-70° from the rachises, flexible;

pulvini glabrous;

pedicels 1.5-14 mm, divergent, with a glandular band.
Spikelets

6-15(18) mm long, 1.3-2(2.2) mm wide, narrowly lanceolate, plumbeous, occasionally with a reddish-purple tinge, with 8-30(40) florets;

disarticulation usually in the rachilla below the florets, occasionally the lemmas falling separately, leaving the paleas on the rachilla.

5-16 mm long, 1.2-2.3 mm wide, linear-lanceolate, plumbeous to dark reddish-purple, with 5-25 florets;

disarticulation acropetal, paleas persistent.
Glumes

lanceolate to ovate, membranous to subhyaline, keeled;

lower glumes 1-1.4 mm;

upper glumes 1.4-1.7 mm;

lemmas 1.5-2.2 mm, broadly ovate, leathery, scabridulous, lateral veins evident, apices acute;

paleas 1.4-2.1 mm, hyaline, bases not projecting beyond the lemmas, keels scabridulous, apices acute to obtuse;

anthers 2, 0.4-0.6 mm, reddish-purple.

ovate, membranous to hyaline;

lower glumes 1.1-1.5 mm;

upper glumes 1.4-2 mm;

lemmas 1.5-2.5 mm, ovate, membranous, strongly keeled, keels without glands, lateral veins conspicuous, apices acute;

paleas 1.2-2.1 mm, hyaline, narrower than the lemmas, apices obtuse to truncate;

anthers 3, 0.3-0.5 mm, purplish.
Caryopses

0.6-0.8 mm, obovoid to ellipsoid, terete, somewhat striate, reddish-brown.

0.8-1.1 mm, rectangular-prismatic to ellipsoid, somewhat laterally compressed, with a well-developed adaxial groove, smooth, faintly striate, mostly opaque, light reddish-brown.
2n

= unknown.

= 84.

Eragrostis bahiensis

Eragrostis swallenii
Distribution
from FNA
AL; FL; GA; LA; NJ; SC
[BONAP county map]
from FNA
TX
[BONAP county map]
Discussion

Eragrostis bahiensis grows in sandy soils near river banks, lake shores, and roadsides, at 0-200 m. Its range extends south from the Gulf Coast of the United States through Mexico to Peru, Bolivia, Paraguay, and Argentina.

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

Eragrostis swallenii grows in sandy sites along coastal grasslands and roadsides, often with Andropogon and Spartina, at 30-150 m. Its range extends around the Gulf coast from Texas to Mexico.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 25, p. 101. FNA vol. 25, p. 93.
Parent taxa Poaceae > subfam. Chloridoideae > tribe Cynodonteae > Eragrostis Poaceae > subfam. Chloridoideae > tribe Cynodonteae > Eragrostis
Sibling taxa
E. airoides, E. amabilis, E. atrovirens, 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. 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. tef, E. trichodes, E. trichophora, E. unioloides
Name authority (Schrad.) Schult. Hitchc.
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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