Eragrostis pilosa

(L.) P. Beauv.
Common names: India lovegrass Eragrostide poilue
Introduced
Synonyms: Eragrostis peregrina Eragrostis perplexa Eragrostis multicaulis
Treatment appears in FNA Volume 25. Treatment on page 81.

Plants annual; tufted, without innovations. Culms 8-45 (70) cm, erect or geniculate, glabrous, occasionally with a few glandular depressions. 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. 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. 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. 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, ovatelanceolate, 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. Caryopses 0.5-1 mm, obovoid to prism-shaped, adaxial surfaces flat, smooth to faintly striate, light-brown. 2n = 40.

Distribution

Conn., N.J., N.Y., Va., Del., D.C., Wis., W.Va., Pacific Islands (Hawaii), Idaho, Oreg., Mass., Maine, N.H., R.I., Vt., Fla., N.Mex., Tex., La., Kans., S.Dak., Nebr., Tenn., N.C., S.C., Pa., Nev., Colo., Calif., Puerto Rico, Virgin Islands, Ala., Ark., Ill., Ga., Ind., Iowa, Okla., Ariz., Md., Ohio, Mo., Minn., Mich., Wash., B.C., N.S., Ont., Que., Miss., Ky., N.Dak., Wyo.

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.

Selected References

None.

Key

1 Plants with numerous glandular pits scattered over the whole plant, especially on the midribs of the sheaths and blades; lemmas 1.8-2 mm long Eragrostis pilosa var. perplexa
1 Plants with a few glandular pits scattered on the culms or without any glandular pits; lemmas 1.2-1.8 mm long Eragrostis pilosa var. pilosa

"decumbent" is not a number.

... more about "Eragrostis pilosa"
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Obtuse (?) +  and Acute (?) +
Paul M. Peterson +
(L.) P. Beauv. +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
not +  and glabrous +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
2 cm20 mm <br />0.02 m <br /> (15 cm150 mm <br />0.15 m <br />) +
pubescent +  and glabrous +
involute +, folded +  and flat +
1mm;2.5mm +
not disarticulating +
not spikelike +
pubescent +  and glabrous +
obovoid +  and prism-shaped +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
India lovegrass +  and Eragrostide poilue +
branched +, simple +  and rooting +
geniculate +
8 cm80 mm <br />0.08 m <br /> (45 cm450 mm <br />0.45 m <br />) +
not woody +
Conn. +, N.J. +, N.Y. +, Va. +, Del. +, D.C. +, Wis. +, W.Va. +, Pacific Islands (Hawaii) +, Idaho +, Oreg. +, Mass. +, Maine +, N.H. +, R.I. +, Vt. +, Fla. +, N.Mex. +, Tex. +, La. +, Kans. +, S.Dak. +, Nebr. +, Tenn. +, N.C. +, S.C. +, Pa. +, Nev. +, Colo. +, Calif. +, Puerto Rico +, Virgin Islands +, Ala. +, Ark. +, Ill. +, Ga. +, Ind. +, Iowa +, Okla. +, Ariz. +, Md. +, Ohio +, Mo. +, Minn. +, Mich. +, Wash. +, B.C. +, N.S. +, Ont. +, Que. +, Miss. +, Ky. +, N.Dak. +  and Wyo. +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
5 +  and 17 +
round +  and compressed +
reduced +
persistent +  and deciduous +
shorter or longer +
subtending +
narrowly ovate +  and lanceolate +
uncinate +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
paniculate +  and racemose +
hollow +  and solid +
scabridulous +  and scabrous +
not absent +
(1)3(5)-veined +
grayish-green +  and hyaline +
ovatelanceolate +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
membranous +
sometimes longer +
ciliate +  and ciliolate +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
membranous +
inconspicuous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
concealed +  and prominent +
2 +  and 1 +
deciduous +
2-keeled +
0.1 cm1 mm <br />0.001 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
membranous +
open +  and simple +
4cm +  and 20cm +
ellipsoid +  and ovoid +
2 cm20 mm <br />0.02 m <br /> (15 cm150 mm <br />0.15 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (1 cm10 mm <br />0.01 m <br />) +
dry +  and fleshy +
1 cm10 mm <br />0.01 m <br /> (10 cm100 mm <br />0.1 m <br />) +
hairy +  and glabrous +
spikelike +
Introduced +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
1 +  and 60 +
linear-oblong +  and narrowly ovate +
0.6mm +  and 1.4mm +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Eragrostis peregrina +, Eragrostis perplexa +  and Eragrostis multicaulis +
Eragrostis pilosa +
Eragrostis +
species +
membranous +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
7 +  and 13 +
rhizomatous +  and stoloniferous +
aquatic +  and terrestrial +
dioecious +  and synoecious +