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, midveins 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-veined 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.

"decumbent" is not a number.

... more about "Sporobolus clandestinus"
pilose +  and glabrous +
quadrangular +, fusiform +, obovoid +  and ellipsoid +
yellow +  and orangish +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
Paul M. Peterson +, Stephan L. Hatch +  and Alan S. Weakley +
(Biehler) Hitchc. +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
4 cm40 mm <br />0.04 m <br /> (23 cm230 mm <br />0.23 m <br />) +
pubescent +  and glabrous +
involute +  and flat +
1.5mm;4mm +
spikelike +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Hidden dropseed +
40 cm400 mm <br />0.4 m <br /> (130 cm1,300 mm <br />1.3 m <br />) +
10 cm100 mm <br />0.1 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +
not woody +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
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. +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
bisexual +  and fertile +
round +  and compressed +
reduced +
1.5 cm15 mm <br />0.015 m <br /> (?) +
reddish-brown +
flattened +  and ellipsoid +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
shorter or longer +
subtending +
lanceolate +
subequal +
membranous +  and chartaceous +
uncinate +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
paniculate +  and racemose +
hollow +  and solid +
not absent +
3-veined +  and 2-veined +
appressed-pubescent +
scabridulous +
acute +  and obtuse +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
chartaceous +  and membranous +
sometimes longer +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
inconspicuous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.62 cm6.2 mm <br />0.0062 m <br />) +
concealed +  and prominent +
2 +  and 1 +
ovate +  and lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
5cm +  and 11cm +
spikelike +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
scabridulous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
mucilaginous +
adherent +  and free +
0.4 cm4 mm <br />0.004 m <br /> (5 cm50 mm <br />0.05 m <br />) +
spikelike +
stramineous +  and purplish-tinged +
10 +  and 40 +
rounded +  and laterally compressed +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Sporobolus compositus var. clandestinus +  and Sporobolus clandestinus var. canovirens +
Sporobolus clandestinus +
Sporobolus +
species +
membranous +
slightly shorter or longer +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
quadrangular +, fusiform +, obovoid +  and ellipsoid +
7 +  and 13 +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +