Eragrostis trichodes

(Nutt.) Alph. Wood
Common names: Sand lovegrass
Endemic
Synonyms: Eragrostis trichodes var. pilifera Eragrostis pilifera
Treatment appears in FNA Volume 25. Treatment on page 93.

Plants perennial; cespitose, with innovations, without rhizomes, not glandular. Culms 30-120 (160) cm, erect, glabrous and nonglandular below the nodes. Sheaths sometimes villous along the margins, apices hairy, hairs to 5 mm; ligules 0.3-0.5 mm; blades 15-46 (65) cm long, 1.5-8 mm wide, flat to involute, abaxial surfaces glabrous, adaxial surfaces scabridulous, sometimes also pilose on the basal 1/4, hairs to 4 mm. Panicles 30-80 cm long, 6-30 cm wide, oblong to ovoid, diffuse; primary branches 2-35 cm, diverging 20-90° from the rachises, naked basally; pulvini hairy or glabrous; pedicels 2-22 cm, diverging, capillary. Spikelets 3-15 mm long, 1.5—3.6 mm wide, ovate to lanceolate, greenish-yellow with a reddish-purple tinge, with (2) 4-18 florets; disarticulation acropetal, paleas persistent. Glumes subequal, 1.8-4 mm, narrowly ovate to linear-lanceolate, membranous, apices acuminate; upper glumes as long as or longer than the basal lemmas; lemmas 2.2-3.5 mm, broadly ovate to lanceolate, membranous, strongly keeled, keels not glandular, lateral-veins conspicuous, apices acute; paleas 1.8-2.8 mm, hyaline, narrower than the lemmas, keels ciliolate, apices obtuse to truncate; anthers 3, 1-1.6 mm, purplish. Caryopses 0.8-1.3 mm, rectangular-prismatic, somewhat laterally compressed, with a wide, deep adaxial groove, faintly striate, opaque, dark reddish-brown. 2n = 40.

Distribution

Va., Colo., N.Mex., Tex., La., Mo., Minn., Mich., Ala., Wis., Tenn., Kans., Nebr., Okla., S.Dak., Ark., Ill., Miss., Ind., Iowa, Ohio, N.Y., Wyo.

Discussion

Eragrostis trichodes grows in sandy to gravelly prairies, open sandy woods, rocky slopes, and roadsides, at 100-2150 m, often in associations with Quercus marilandica, Q. stellata, Juniperus, and Redfieldia flexuosa. It is endemic to the contiguous United States, and is available commercially as an ornamental. Records from outside the primary range probably reflect introductions.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Eragrostis trichodes"
0.1 cm1 mm <br />0.001 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
Obtuse (?) +  and Truncate (?) +
Paul M. Peterson +
(Nutt.) Alph. Wood +
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 +
15 cm150 mm <br />0.15 m <br /> (46 cm460 mm <br />0.46 m <br />) +
pubescent +  and glabrous +
flat +  and involute +
1.5mm;8mm +
not disarticulating +
not spikelike +
pubescent +  and glabrous +
dark reddish-brown +  and opaque +
compressed +  and rectangular-prismatic +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Sand lovegrass +
branched +, simple +  and rooting +
geniculate +
30 cm300 mm <br />0.3 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
not woody +
Va. +, Colo. +, N.Mex. +, Tex. +, La. +, Mo. +, Minn. +, Mich. +, Ala. +, Wis. +, Tenn. +, Kans. +, Nebr. +, Okla. +, S.Dak. +, Ark. +, Ill. +, Miss. +, Ind. +, Iowa +, Ohio +, N.Y. +  and Wyo. +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
4 +  and 18 +
round +  and compressed +
reduced +
persistent +  and deciduous +
shorter or longer +
subtending +
narrowly ovate +  and linear-lanceolate +
subequal +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
membranous +
uncinate +
0 cm0 mm <br />0 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
paniculate +  and racemose +
hollow +  and solid +
not absent +
(1)3(5)-veined +
keeled +, broadly ovate +  and lanceolate +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
membranous +
sometimes longer +
ciliate +  and ciliolate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
membranous +
inconspicuous +
concealed +  and prominent +
2 +  and 1 +
persistent +
2-keeled +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
narrower +
open +  and simple +
30cm +  and 80cm +
oblong +  and ovoid +
6 cm60 mm <br />0.06 m <br /> (30 cm300 mm <br />0.3 m <br />) +
capillary +
2 cm20 mm <br />0.02 m <br /> (22 cm220 mm <br />0.22 m <br />) +
dry +  and fleshy +
2 cm20 mm <br />0.02 m <br /> (35 cm350 mm <br />0.35 m <br />) +
glabrous +  and hairy +
spikelike +
greenish-yellow with a reddish-purple tinge +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
1 +  and 60 +
ovate +  and lanceolate +
1.5mm +  and 3.6mm +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Eragrostis trichodes var. pilifera +  and Eragrostis pilifera +
Eragrostis trichodes +
Eragrostis +
species +
membranous +
7 +  and 13 +
rhizomatous +  and stoloniferous +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +  and synoecious +