Eragrostis pectinacea

(Michx.) Nees
Common names: Tufted lovegrass Eragrostide pecttnee
Treatment appears in FNA Volume 25. Treatment on page 81.

Plants annual; tufted, without innovations, without glandular pits. Culms 10-80 cm, erect to geniculate or decumbent below, glabrous. Sheaths hirsute at the apices, hairs to 4 mm; ligules 0.2-0.5 mm; blades 2-20 cm long, 1-4.5 mm wide, flat to involute, abaxial surfaces glabrous and smooth, adaxial surfaces scabridulous. Panicles 5-25 cm long, 3-12 (15) cm wide, ovoid to pyramidal, usually open, sometimes contracted; primary branches 0.6-8.5 cm, appressed or diverging to 80° from the rachises, solitary or paired at the lowest 2 nodes; pulvini glabrous or sparsely hairy; pedicels 1-7 mm, flexible, appressed to widely divergent, sometimes capillary. Spikelets 3.5-11 mm long, 1.2-2.5 mm wide, linear-oblong to narrowly lanceolate, plumbeous, yellowish-brown, or dark reddish-purple, with 6-22 florets; disarticulation acropetal, paleas persistent. Glumes subulate to ovatelanceolate, hyaline; lower glumes 0.5-1.5 mm, at least 1/2 as long as the adjacent lemmas; upper glumes 1-1.7 mm, usually broader than the lower glumes; lemmas 1-2.2 mm, ovatelanceolate, hyaline to membranous, grayish-green proximally, reddish-purple distally, lateral-veins moderately conspicuous, apices acute; paleas 1-2 mm, hyaline to membranous, keels scabridulous, apices obtuse; anthers 3, 0.2-0.7 mm, purplish. Caryopses 0.5-1.1 mm, pyriform, slightly laterally compressed, smooth, faintly striate, brownish. 2n = 60.

Distribution

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

Discussion

Eragrostis pectinacea is native from southern Canada to Argentina. In the Flora region, it grows in disturbed sites such as roadsides, railroad embankments, gardens, and cultivated fields, at 0-1200 m.

Selected References

None.

Key

1 Anthers 0.5-0.7 mm long Eragrostis pectinacea var. tracyi
1 Anthers 0.2-0.4 mm long. > 2
2 Pedicels appressed, rarely diverging to 20° from the branches Eragrostis pectinacea var. pectinacea
2 Pedicels widely divergent, usually diverging 20-60° from the branches Eragrostis pectinacea var. miserrima

"decumbent" is not a number.

... more about "Eragrostis pectinacea"
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
Obtuse (?) +  and Acute (?) +
Paul M. Peterson +
(Michx.) Nees +
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 /> (20 cm200 mm <br />0.2 m <br />) +
pubescent +  and glabrous +
flat +  and involute +
1mm;4.5mm +
not disarticulating +
not spikelike +
pubescent +  and glabrous +
compressed +  and pyriform +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Tufted lovegrass +  and Eragrostide pecttnee +
branched +, simple +  and rooting +
geniculate +
10 cm100 mm <br />0.1 m <br /> (80 cm800 mm <br />0.8 m <br />) +
not woody +
Conn. +, N.J. +, N.Y. +, B.C. +, N.B. +, N.S. +, Ont. +, Que. +, Wash. +, Wis. +, Del. +, Ill. +, Ohio +, Utah +, Virgin Islands +, D.C. +, Ark. +, Kans. +, Minn. +, N.Dak. +, Nebr. +, Okla. +, S.Dak. +, W.Va. +, Pacific Islands (Hawaii) +, Mass. +, Maine +, N.H. +, R.I. +, Vt. +, Fla. +, Wyo. +, N.Mex. +, Tex. +, La. +, Tenn. +, Pa. +, Ga. +, Ky. +, Mich. +, Mont. +, Nev. +, Oreg. +, S.C. +, Va. +, Colo. +, Calif. +, Puerto Rico +, Ala. +, Miss. +, N.C. +, Ind. +, Iowa +, Md. +, Ariz. +, Idaho +  and Mo. +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
6 +  and 22 +
round +  and compressed +
reduced +
persistent +  and deciduous +
shorter or longer +
subtending +
subulate +  and ovatelanceolate +
uncinate +
0 cm0 mm <br />0 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
paniculate +  and racemose +
hollow +  and solid +
scabridulous +
not absent +
(1)3(5)-veined +
grayish-green +  and hyaline +
ovatelanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
membranous +
sometimes longer +
ciliate +  and ciliolate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
membranous +
inconspicuous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
concealed +  and prominent +
2 +  and 1 +
persistent +
2-keeled +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
membranous +
5cm +  and 25cm +
ovoid +  and pyramidal +
3 cm30 mm <br />0.03 m <br /> (12 cm120 mm <br />0.12 m <br />) +
capillary +
0.1 cm1 mm <br />0.001 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
dry +  and fleshy +
paired +  and solitary +
diverging;appressed +
0.6 cm6 mm <br />0.006 m <br /> (8.5 cm85 mm <br />0.085 m <br />) +
hairy +  and glabrous +
spikelike +
dark reddish-purple +, yellowish-brown +  and plumbeous +
0.35 cm3.5 mm <br />0.0035 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
1 +  and 60 +
linear-oblong +  and narrowly lanceolate +
1.2mm +  and 2.5mm +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Eragrostis pectinacea +
Eragrostis +
species +
membranous +
0.1 cm1 mm <br />0.001 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
usually broader +
7 +  and 13 +
rhizomatous +  and stoloniferous +
aquatic +  and terrestrial +
dioecious +  and synoecious +