Eragrostis pilosa |
Eragrostis obtusiflora |
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eragrostide poilue, India lovegrass, Indian love grass |
alkali lovegrass |
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Habit | Plants annual; tufted, without innovations. | Plants perennial; rhizomatous, sometimes also stoloniferous, with many innovations and scaly, sharp-tipped rhizomes 4-8 mm thick. | ||||
Culms | 8-45(70) cm, erect or geniculate, glabrous, occasionally with a few glandular depressions. |
15-40(50) cm, erect, stiff, hard. |
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Sheaths | mostly glabrous, occasionally glandular, apices hirsute, hairs to 3 mm; ligules 0.1-0.3 mm, ciliate; blades 2-15(20) cm long, 1-2.5(4) mm wide, flat, abaxial surfaces glabrous, occasionally with glandular pits along the midrib, adaxial surfaces scabridulous. |
hairy at the apices, hairs to 2 mm; ligules 0.2-0.4 mm, membranous, ciliate; blades 2-15 cm long, (1)2-4 mm wide, involute, arcuate, glabrous abaxially, scabrous adaxially, apices sharply pointed. |
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Panicles | 4-20(28) cm long, 2-15(18) cm wide, ellipsoid to ovoid, diffuse; primary branches 1-10 cm, diverging 10-80°(110°) from the rachises, capillary, whorled on the lowest 2 nodes, rarely glandular; pulvini glabrous or hairy; pedicels 1-10 mm, flexible, appressed or divergent. |
terminal, 6-20(24) cm long, 2-8(12) cm wide, ovate, open or contracted; primary branches 1-8(15) cm, appressed or diverging up to 50° from the rachises; pulvini glabrous or not; pedicels 0-8 mm, appressed, lower pedicels on each branch shorter than 1 mm. |
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Spikelets | (2)3.5-6(10) mm long, 0.6-1.4 mm wide, linear-oblong to narrowly ovate, plumbeous, with (3)5-17 florets; disarticulation acropetal, paleas tardily deciduous, rachillas persisting longer than the paleas. |
8-14 mm long, 1.4-3 mm wide, ovate to lanceolate, stramineous with a reddish-purple tinge, with 5-10 florets; disarticulation basipetal, glumes persistent. |
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Glumes | narrowly ovate to lanceolate, hyaline; lower glumes 0.3-0.6(0.8) mm; upper glumes 0.7-1.2(1.4) mm; lemmas 1.2-1.8(2) mm, ovate-lanceolate, membranous to hyaline, grayish-green proximally, reddish-purple distally, lateral veins inconspicuous, apices acute; paleas 1-1.6 mm, membranous to hyaline, keels scabridulous to scabrous, apices obtuse; anthers 3, 0.2-0.3 mm, purplish. |
unequal, chartaceous; lower glumes 2.4-3.6 mm; upper glumes 3-4.5 mm, sometimes 3-veined; lemmas 3.8-4.5 mm, ovate, leathery, 3(4, 5)-veined, lateral veins evident, greenish, upper margins hyaline, apices acute to obtuse, usually erose; paleas 3.8-4.5 mm, membranous, keels scabridulous, apices obtuse to truncate; anthers 3, 2-2.4 mm, purplish to yellowish. |
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Caryopses | 0.5-1 mm, obovoid to prism-shaped, adaxial surfaces flat, smooth to faintly striate, light brown. |
1.6-2 mm, ellipsoid, dorsally flattened, with a shallow adaxial groove, striate, reddish-brown. |
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2n | = 40. |
= 40. |
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Eragrostis pilosa |
Eragrostis obtusiflora |
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Distribution |
AL; AR; AZ; CA; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; VA; VT; WA; WI; WV; WY; HI; PR; BC; NS; ON; QC; Virgin Islands
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Discussion | Eragrostis pilosa is native to Eurasia but has become naturalized in many parts of the world. In the Flora region, it grows in forest margins and disturbed sites such as roadsides, railroad embankments, gardens, and cultivated fields, at 0-2500 m. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Eragrostis obtusiflora is native to the southwestern United States and Mexico. It grows in dry or wet alkali flats, often in association with Distichlis and Sarcobatus, at 900-1400 m. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 25, p. 81. | FNA vol. 25, p. 89. | ||||
Parent taxa | Poaceae > subfam. Chloridoideae > tribe Cynodonteae > Eragrostis | Poaceae > subfam. Chloridoideae > tribe Cynodonteae > Eragrostis | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | E. peregrina, E. perplexa, E. multicaulis | |||||
Name authority | (L.) P. Beauv. | (E. Fourn.) Scribn. | ||||
Web links |
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