Sporobolus clandestinus

(Biehler) Hitchc.
Common names: Hidden dropseed
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.


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.


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


Lower Taxa

... 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 +