Eragrostis frankii
Eragrostis cumingii
sandbar lovegrass, éragrostide de Frank
Cuming's lovegrass
10-50 cm, erect to geniculate, glabrous, often with glandular pits below the nodes.
10-40(50) cm, erect to prostrate, sometimes geniculate, branching profusely from near the base, glabrous below the nodes.
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, scabridu-lous adaxially.
sparsely hairy at the apices, hairs to 2.5 mm;
ligules 0.1-0.2 mm;
blades 3-10(12) cm long, 1-3 mm wide, flat to involute, sparsely pilose on the basal 1/2, scabridulous distally.
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 glandular pits, naked basally;
pulvini glabrous;
pedicels 1.5-5 mm, divergent.
5-20 cm long, 2-8 cm wide, narrowly ovate, open, with 6-10 primary branches;
primary branches 1-6 cm, widely spaced, axes trigonous, diverging to 90° from the rachises, densely spikelet-bearing to the base;
pulvini sparsely pilose;
pedicels 0.4-1(2) mm, stout, straight, flattened.
(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.
5-12(18) mm long, 1.4-2.4 mm wide, linear-lanceolate, chartaceous, stramineous to greenish with reddish-purple tinges, with 12-42 florets;
disarticulation acropetal.
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.
subequal in length, 1.2-1.9 mm, narrowly lanceolate to lanceolate, membranous;
lower glumes narrower than the upper glumes;
lemmas 1.3-2 mm, lanceolate to ovate, chartaceous, lateral veins conspicuous, greenish, apices acute;
paleas 1-1.6 mm, hyaline, keels ciliate, cilia 0.1-0.2 mm, apices obtuse to acute;
anthers 3, 0.1-0.2 mm, purplish.
0.4-0.7 mm, ovoid to rectangular-prismatic, striate, reddish-brown, adaxial surfaces flat or shallowly grooved, distal 2/3 opaque.
0.4-0.6 mm, ovoid, laterally compressed, finely striate, light brown.
= 40, 80.
= 40.
Eragrostis frankii
Eragrostis cumingii
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.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Eragrostis cumingii is native to southeast Asia and Australia. Within the Flora region, it has become established in Florida, growing in waste places and along roadsides in sandy or gravelly soils, at 0-150 m.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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