Sporobolus virginicus
Sporobolus domingensis
marine couch, sand couch, seashore dropseed
coral dropseed
10-65 cm, erect to decumbent.
20-100 cm.
overlapping, margins ciliate, apices with tufts of hairs, hairs to 2 mm;
ligules 0.1-0.4 mm;
blades usually conspicuously distichous, 4-16 cm long, 2-5 mm wide, flat to loosely involute, glabrous abaxially, scabridulous adaxially, margins scabridulous.
rounded below, distal margins and apices hairy, hairs to 3 mm;
ligules 0.2-1.2 mm;
blades 5-20 cm long, 3-8 mm wide, flat to loosely involute, glabrous abaxially, scabridulous adaxially, margins scabridulous.
3-10 cm long, 0.4-1.6 cm wide, contracted, spikelike, dense;
primary branches 0.5-2 cm, appressed, spikelet-bearing to the base;
pedicels 0.2-1.4 mm, appressed.
10-25(35) cm long, 1-5 cm wide, usually some-what contracted, sometimes spikelike, often interrupted below;
primary branches 0.7-7 cm, appressed or spreading to 30° from the rachis, spikelet-bearing to the base;
secondary branches appressed;
pedicels 0.2-1.4 mm, appressed.
(1.8)2-3.2 mm, yellowish-white to purplish-tinged, sometimes grayish.
1.6-2 mm, yellowish-green to grayish.
subequal, ovate-oblong, membranous;
lower glumes 1.5-2.4 mm;
upper glumes 1.8-3(3.2) mm;
lemmas 2.1-3 mm, ovate to lanceolate, membranous, glabrous, acute;
paleas 2.1-3 mm, ovate, membranous;
anthers 3, 1-1.7 mm, yellowish.
unequal, linear-lanceolate to ovate, membranous;
lower glumes 0.5-1.1 mm, usually without veins;
upper glumes 1.1-2 mm, subequal to the lemmas;
lemmas 1.1-2 mm, ovate, membranous, glabrous (occasionally minutely pubescent), acute;
paleas 1-2 mm, ovate, membranous;
anthers 2 or 3, 0.5-1 mm, yellowish or purplish.
not known.
0.7-1.1 mm, ellipsoid, laterally flattened, light brownish.
= 20, 30.
= unknown.
Sporobolus virginicus
Sporobolus domingensis
Sporobolus virginicus grows on sandy beaches, sand dunes, and in saline habitats, primarily along the south-eastern coast, occasionally inland. Its range extends through Mexico and Central America to Peru, Chile, and Brazil. No fruits of this species have been found despite examination of several natural populations and over 200 herbarium specimens.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Sporobolus domingensis grows in sandy, rocky, or alkaline soils, often in disturbed sites adjacent to the coast and below 20 m. Its range extends to the Antilles and the Yucatan Peninsula, Mexico.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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