Eragrostis frankii

C.A. Mey. ex Steud.
Common names: Sandbar lovegrass Éragrostide de frank
Endemic
Synonyms: Eragrostis frankii var. brevipes
Treatment appears in FNA Volume 25. Treatment on page 79.

Plants annual; cespitose, without innovations. Culms 10-50 cm, erect to geniculate, glabrous, often with glandular pits below the nodes. Sheaths mostly glabrous, apices hirsute, hairs to 4 mm, often also with glandular pits; ligules 0.2-0.5 mm, ciliate; blades (2) 4-10 (21) cm long, 1-4 mm wide, flat to involute, glabrous abaxially, scabridulous adaxially. Panicles 4-20 cm long, less than 1/2 the height of the plants, 2-10 (14) cm wide, narrowly elliptic, open; primary branches 2-6 cm, compact, diverging 20-70° from the rachises, capillary, sometimes with glan¬dular pits, naked basally; pulvini glabrous; pedicels 1.5-5 mm, divergent. Spikelets (1.7) 2-4 (5.6) mm long, 1-2 (2.5) mm wide, broadly ovate to lanceolate, plumbeous to reddish-purple, with 3-6 florets; disarticulation acropetal, paleas persistent. Glumes narrowly lanceolate to lanceolate, hyaline; lower glumes 1-1.5 mm; upper glumes 1-1.8 mm; lemmas 1.1-1.6 mm, broadly ovate, membranous, lateral-veins inconspicuous, apices acute; paleas 1-1.5 mm, hyaline, keels scabridulous, apices obtuse; anthers 2 or 3, 0.2-0.3 mm, purplish. Caryopses 0.4-0.7 mm, ovoid to rectangular-prismatic, striate, reddish-brown, adaxial surfaces flat or shallowly grooved, distal 2/3 opaque. 2n = 40, 80.

Distribution

W.Va., Conn., Mass., N.H., N.Y., Vt., D.C., Wis., N.B., Ont., Que., Fla., N.Mex., Tex., N.J., N.C., Nebr., Tenn., Pa., Va., Ala., Ark., Ill., Ga., Ind., Iowa, Md., Kans., Okla., Ohio, Mo., Minn., Mich., Miss., S.C., Ky.

Discussion

Eragrostis frankii is native in the central and eastern United States, but it has been found, as an introduction, in southern Ontario, and appears to be increasingly common in the northeastern United States. It grows in moist meadows, along streams and sand bars, in forest openings, and along roadsides, at 5-1500 m, usually in association with Pinus, Quercus, Acer, and Fagus grandiflora. The record from Santa Fe County, New Mexico, is based on a specimen collected by Fendler in 1847; there are no other collections from the state. Fendler's specimens seem to represent either an accidental introduction that did not become established or a labeling error.

Eragrostis frankii is similar to E. capillaris, but differs in its frequent possession of glandular pits, its flat or more shallowly grooved caryopses, shorter pedicels, and glabrous sheath margins, and in having panicles that are usually less than half as long as the culms.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Eragrostis frankii"
3 +  and 2 +
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 +
C.A. Mey. ex Steud. +
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 +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
scabridulous +
flat +  and involute +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
not disarticulating +
not spikelike +
pubescent +  and glabrous +
reddish-brown +
ovoid +  and rectangular-prismatic +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Sandbar lovegrass +  and Éragrostide de frank +
branched +, simple +  and rooting +
geniculate +
10 cm100 mm <br />0.1 m <br /> (50 cm500 mm <br />0.5 m <br />) +
not woody +
W.Va. +, Conn. +, Mass. +, N.H. +, N.Y. +, Vt. +, D.C. +, Wis. +, N.B. +, Ont. +, Que. +, Fla. +, N.Mex. +, Tex. +, N.J. +, N.C. +, Nebr. +, Tenn. +, Pa. +, Va. +, Ala. +, Ark. +, Ill. +, Ga. +, Ind. +, Iowa +, Md. +, Kans. +, Okla. +, Ohio +, Mo. +, Minn. +, Mich. +, Miss. +, S.C. +  and Ky. +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
3 +  and 6 +
round +  and compressed +
reduced +
persistent +  and deciduous +
shorter or longer +
subtending +
narrowly lanceolate +  and lanceolate +
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 +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.16 cm1.6 mm <br />0.0016 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 +
0.1 cm1 mm <br />0.001 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 /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
4cm +  and 20cm +
0 +  and 1/2 +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
dry +  and fleshy +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
spikelike +
plumbeous +  and reddish-purple +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1 +  and 60 +
broadly ovate +  and lanceolate +
1mm +  and 2mm +
1 +  and 3 +
compound +  and simple +
2 (?) +  and 3 (?) +
Eragrostis frankii var. brevipes +
Eragrostis frankii +
Eragrostis +
species +
membranous +
0.1 cm1 mm <br />0.001 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
7 (?) +  and 13 (?) +
rhizomatous +  and stoloniferous +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +  and synoecious +
2cm +  and 10cm +