Eragrostis airoides
Eragrostis pilosa
darnel lovegrass
eragrostide poilue, India lovegrass, Indian love grass
30-110 cm, erect, glabrous below the nodes.
8-45(70) cm, erect or geniculate, glabrous, occasionally with a few glandular depressions.
glabrous or pilose, hairs to 5 mm;
ligules 0.1-0.2 mm;
blades 8-22 mm long, (1)2-4(5) mm wide, flat to folded, glabrous abaxially, scabridulous adaxially.
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.
18-70 cm long, 3-25 cm wide, diffuse, ovate;
primary branches 4-20 cm, appressed or diverging 10-70° from the rachises, naked basally;
pulvini glabrous;
pedicels 2.4-11 mm, divergent.
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.
1.3-2 mm long, 0.8-1.8 mm wide, ovate to lanceolate, plumbeous, with 1-3 florets;
disarticulation acropetal, in the rachilla below the florets, glumes deciduous;
rachilla prolonged above the terminal floret.
(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.
lanceolate to ovate, membranous;
lower glumes 0.8-1 mm;
upper glumes 1.1-1.4 mm;
lemmas 0.8-1.2 mm, ovate, membranous, plumbeous, keels and lateral veins inconspicuous, apices obtuse;
paleas 0.8-1.2 mm, membranous, bases not projecting beyond the lemmas, apices obtuse;
anthers 3, 0.3-0.5 mm, purplish.
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.
0.4-0.5 mm, ovoid, reticulate, reddish-brown.
0.5-1 mm, obovoid to prism-shaped, adaxial surfaces flat, smooth to faintly striate, light brown.
.).
= 36 (Davidse, pers.
= 40.
Eragrostis airoides
Eragrostis pilosa
Eragrostis airoides is a South American species that, in the Flora region, is known only from roadsides and disturbed sites in Brazos County, Texas. It is an enigmatic species, often treated as Sporobolus brasiliensis (Raddi) Hack., which it resembles in its chromosome base number of x = 9 and caryopsis morphology, but its frequent possession of spikelets with more than 1 floret and its mode of spikelet disarticulation argue for its retention in Eragrostis.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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.)
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 | 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 | var. pilosa |
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