Eragrostis pilosa |
Eragrostis lutescens |
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eragrostide poilue, India lovegrass, Indian love grass |
six-weeks love grass |
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Habit | Plants annual; tufted, without innovations. | Plants annual; tufted, without innovations. | ||||
Culms | 8-45(70) cm, erect or geniculate, glabrous, occasionally with a few glandular depressions. |
(2)6-25 cm, usually erect, sometimes decumbent, glabrous, with elliptical, yellowish, glandular pits below the nodes. |
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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. |
with elliptical glandular pits, sparsely hairy at the throat, hairs to 2 mm; ligules 0.2-0.5 mm, ciliate; blades 2-12 cm long, 1-3 mm wide, flat to involute, abaxial surfaces scabridulous, bases with glandular pits. |
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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, 4-10(15) cm long, 0.5-2 cm wide, narrowly elliptic, contracted, dense; primary branches alternate, usually appressed, occasionally diverging to 30° from the rachises, rachises and branches with glandular pits; pulvini glabrous; pedicels 1.4-10 mm, appressed or divergent. |
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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. |
3.6-7.5 mm long, 1.2-2 mm wide, narrowly ovate, light yellowish, occasionally mottled with reddish-purple, with 6-11(14) florets; disarticulation acropetal, paleas 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. |
subequal, ovate to lanceolate, hyaline; lower glumes (0.7)0.9-1.4 mm; upper glumes 1.2-1.8 mm; lemmas 1.5-2.2 mm, ovate, subhyaline, stramineous, veins greenish and conspicuous, apices acute; paleas 1.2-2 mm, hyaline, keels scabridulous, apices obtuse; anthers 3, 0.2-0.3 mm, purplish. |
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Caryopses | 0.5-1 mm, obovoid to prism-shaped, adaxial surfaces flat, smooth to faintly striate, light brown. |
0.5-0.8 mm, pyriform except slightly flattened adaxially, smooth, light brown. |
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2n | = 40. |
= unknown. |
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Eragrostis pilosa |
Eragrostis lutescens |
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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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AZ; CA; CO; ID; NM; NV; OR; WA |
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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 lutescens grows on the sandy banks of streams and lakes and in moist alkaline flats of the western United States at 300-2000 m. It has not been reported from Mexico. (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. 79. | ||||
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. | Scribn. | ||||
Web links |
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