Sporobolus clandestinus

(Biehler) Hitchc.
Common names: Hidden dropseed
Endemic
Synonyms: Sporobolus compositus var. clandestinus Sporobolus clandestinus var. canovirens
Treatment appears in FNA Volume 25. Treatment on page 122.

Plants perennial; cespitose, occasionally rhizomatous. Culms 40-130(150) cm tall, 1-4 mm thick, frequently glaucous. Sheaths with sparsely hairy apices, hairs to 3 mm, not conspicuously tufted; uppermost sheaths 0.5-3 mm wide; ligules 0.1-0.4 mm; blades 4-23 cm long, 1.5-4 mm wide, flat or involute, abaxial surface glabrous or pilose, adaxial surface glabrous or scabridulous, margins glabrous. Panicles terminal and axillary, 5-11 cm long, 0.04-0.2(0.3) cm wide, with 10-40 spikelets per cm2, narrow, sometimes spikelike, included in the uppermost sheath; lower nodes with 1-2(3) branches; primary branches 0.4-5 cm, appressed, spikelet-bearing to the base; secondary branches appressed; pulvini glabrous; pedicels 0.3-3.5 mm, appressed, glabrous or scabridulous. Spikelets 4-9(10) mm, stramineous to purplish-tinged. Glumes subequal, lanceolate, membranous to chartaceous, mid-veins usually greenish; lower glumes 1.5-6.2 mm; upper glumes (2)2.5-5(6.5) mm, slightly shorter or longer than the lemmas; lemmas (2.2)3-7(7.4) mm, lanceolate, chartaceous and opaque, minutely appressed pubescent or scabridulous, occasionally 2- or 3-veined, acute to obtuse; paleas (2.2)3-9(10) mm, ovate to lanceolate, chartaceous; anthers 2.2-3.2 mm, yellow to orangish. Fruits (1.5)2.4-3.5 mm, ellipsoid, laterally flattened, often striate, reddish-brown; pericarps loose, but neither gelatinous nor slipping from the seeds when wet. 2n = unknown.

Distribution

Del., D.C., Wis., W.Va., Fla., N.J., Tex., La., Tenn., N.C., S.C., Pa., N.Y., Va., Ala., Ark., Ill., Ga., Ind., Iowa, Conn., Md., Kans., Okla., Mo., Miss., Ky., Mass.

Discussion

Sporobolus clandestinus grows primarily in sandy soils along the coast and, inland, along roadsides. In the southeastern United States, it is found in dry to mesic longleaf pine-oak-grass communities and cedar glades. Its range lies entirely within the Flora region.

Selected References

None.

Lower Taxa

None.
... more about "Sporobolus clandestinus"
Paul M. Peterson +, Stephan L. Hatch +  and Alan S. Weakley +
(Biehler) Hitchc. +
Hidden dropseed +
Del. +, D.C. +, Wis. +, W.Va. +, Fla. +, N.J. +, Tex. +, La. +, Tenn. +, N.C. +, S.C. +, Pa. +, N.Y. +, Va. +, Ala. +, Ark. +, Ill. +, Ga. +, Ind. +, Iowa +, Conn. +, Md. +, Kans. +, Okla. +, Mo. +, Miss. +, Ky. +  and Mass. +
Sporobolus compositus var. clandestinus +  and Sporobolus clandestinus var. canovirens +
Sporobolus clandestinus +
Sporobolus +
species +