The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Mediterranean love grass

Swallen's lovegrass

Habit Plants annual; tufted, without innovations. Plants perennial; cespitose, with innovations, without rhizomes.
Culms

(5)10-60 cm, erect or decumbent, much-branched near the base, with a ring of glandular tissue below the nodes, rings often shiny or yellowish.

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

Sheaths

hairy at the apices, hairs to 4 mm;

ligules 0.2-0.5 mm, ciliate;

blades 1.5-10 cm long, 1-3(5) mm wide, flat, abaxial surfaces glabrous, adaxial surfaces glabrous, sometimes scabridulous, occasionally with white hairs to 3 mm, margins without crateriform glands.

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

4-20 cm long, 2.2-8(10) cm wide, ovate, open to contracted, rachises with shiny or yellowish glandular spots or rings below the nodes;

primary branches 0.5-6 cm, diverging 20-100° from the rachises;

pulvini glabrous;

pedicels 1-4 mm, stout, stiff, divergent, without glandular bands.

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

4-7(11) mm long, 1.1-2.2 mm wide, narrowly ovate, reddish-purple to greenish, occasionally grayish, with 7-12(20) florets;

disarticulation acropetal, paleas persistent.

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

broadly ovate, membranous, 1-veined;

lower glumes 0.9-1.4 mm;

upper glumes 1.2-1.6 mm;

lemmas 1.4-1.8 mm, broadly ovate, membranous, apices acute to obtuse;

paleas 1.3-1.7 mm, hyaline, keels scabrous, scabridities to 0.1 mm, apices obtuse to acute;

anthers 3, 0.1-0.2 mm, reddish-brown.

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

0.4-0.7 mm, ellipsoid, not grooved, smooth to faintly striate, light 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

= 40.

= 84.

Eragrostis barrelieri

Eragrostis swallenii

Distribution
from FNA
AL; AZ; CA; CO; FL; KS; LA; MA; MD; MO; NE; NM; NV; OK; SC; TN; TX; UT; PR; Virgin Islands
[WildflowerSearch map]
[BONAP county map]
from FNA
TX
[BONAP county map]
Discussion

Eragrostis barrelieri is a European species that is now naturalized in the Flora region, primarily in the south-western United States. It grows on gravelly roadsides, in gardens, and other disturbed, sandy sites, especially near railroad yards, at 10-2000 m. The ring of glandular tissue is most conspicuous below the upper cauline nodes.

(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. 83. 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. bahiensis, 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 Daveau Hitchc.
Web links