Sporobolus virginicus |
Sporobolus neglectus |
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|---|---|---|
|
marine couch, sand couch, seashore dropseed |
puffsheath dropseed, small dropseed, sporobole neglige |
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| Habit | Plants perennial; rhizomatous, stoloniferous. | Plants annual; tufted, delicate, slender. |
| Culms | 10-65 cm, erect to decumbent. |
10-45 cm, wiry, erect to decumbent. |
| Sheaths | 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. |
inflated, mostly glabrous but the apices with small tufts of hairs, hairs to 3 mm; ligules 0.1-0.3 mm; blades 1-12 cm long, 0.6-2 mm wide, flat to loosely involute, abaxial surface glabrous, adaxial surface scabridulous, bases of both surfaces sometimes with papillose-based hairs, margins smooth or scabridulous. |
| Panicles | 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. |
terminal and axillary, 2-5 cm long, 0.2-0.5 cm wide, contracted, cylindrical, included in the uppermost sheath; lower nodes with 1-2(3) branches; primary branches 0.4-1.8 cm, appressed, spikelet-bearing to the base; secondary branches appressed; pedicels 0.1-2.5 mm, appressed, scabridulous. |
| Spikelets | (1.8)2-3.2 mm, yellowish-white to purplish-tinged, sometimes grayish. |
1.6-3 mm, yellowish to cream-colored, sometimes purple-tinged. |
| Glumes | 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. |
subequal, shorter than the florets, lanceolate to ovate, membranous to chartaceous, glabrous; lower glumes 1.5-2.4 mm, midveins often greenish; upper glumes 1.7-2.7 mm; lemmas 1.6-2.9 mm, ovate, chartaceous, glabrous, acute; paleas 1.6-3 mm, ovate, chartaceous, glabrous; anthers 3, 1.1-1.6 mm, purplish. |
| Fruits | not known. |
1.2-1.8 mm, obovoid, laterally flattened, light brownish or orangish-brown, translucent, finely striate. |
| 2n | = 20, 30. |
= 36. |
Sporobolus virginicus |
Sporobolus neglectus |
|
| Distribution |
AL; FL; GA; LA; MD; MS; NC; SC; TX; VA; HI; PR; Virgin Islands
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AL; AR; AZ; CA; CO; CT; DC; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MT; ND; NE; NH; NJ; NM; NY; OH; OK; PA; SD; TN; TX; VA; VT; WA; WI; WV; WY; AB; MB; NB; ON; QC; SK
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| Discussion | 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 neglectus is native to the Flora region, and grows at 0-1300 m in sandy soils, on river shores, and in dry, open areas within many plant communities, often in disturbed sites. It appears to have been extirpated from Maine and Maryland and is considered endangered or of special concern in Connecticut, Massachusetts, New Hampshire, and New Jersey. Sporobolus vaginiflorus is very similar to S. neglectus, but it differs in having strigose lemmas, sheaths that are sparsely hairy towards the base and, usually, longer spikelets. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| Parent taxa | ||
| Sibling taxa | ||
| Synonyms | S. vaginiflorus var. neglectus | |
| Name authority | (L.) Kunth | Nash |
| Source | FNA vol. 25, p. 121. | FNA vol. 25, p. 121. |
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