Sporobolus compositus var. compositus

Synonyms: Sporobolus asper var. hookeri Sporobolus undefined var. asper
Treatment appears in FNA Volume 25. Treatment on page 122.

Plants not rhizomatous. Culms stout, 2-5 mm thick. Uppermost sheaths usually 2.6-6 mm wide. Panicles with 30-90 spikelets per cm2 when pressed. Fruits 1-1.8 mm.

Distribution

Ariz., Oreg., Wash., Del., Wis., W.Va., Minn., N.Dak., Nebr., Okla., S.Dak., Wyo., N.J., B.C., Man., N.B., Ont., Que., Conn., Mass., R.I., La., Tenn., N.Y., Pa., Ill., Ind., Ky., Md., Mich., N.C., Ohio, Utah, Vt., Va., Colo., Ala., Ark., Iowa, Idaho, N.Mex., Maine, Tex., Kans., Mont., Mo., Miss.

Discussion

Sporobolus compositus var. compositus is the most widespread of the three varieties, being found through¬out most of the range shown for the species, but not in South Carolina or Florida.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

108 +, 88 +  and 54 +
pilose +  and glabrous +
quadrangular +, fusiform +, obovoid +  and ellipsoid +
yellow +  and orangish +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
Paul M. Peterson +, Stephan L. Hatch +  and Alan S. Weakley +
(Poir.) Merr. +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
5 cm50 mm <br />0.05 m <br /> (70 cm700 mm <br />0.7 m <br />) +
pubescent +  and glabrous +
0.15 cm1.5 mm <br />0.0015 m <br /> (1 cm10 mm <br />0.01 m <br />) +
spikelike +
triangular +  and dome--shaped +
sometimes longer +
membranous +
30 cm300 mm <br />0.3 m <br /> (130 cm1,300 mm <br />1.3 m <br />) +
not woody +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Ariz. +, Oreg. +, Wash. +, Del. +, Wis. +, W.Va. +, Minn. +, N.Dak. +, Nebr. +, Okla. +, S.Dak. +, Wyo. +, N.J. +, B.C. +, Man. +, N.B. +, Ont. +, Que. +, Conn. +, Mass. +, R.I. +, La. +, Tenn. +, N.Y. +, Pa. +, Ill. +, Ind. +, Ky. +, Md. +, Mich. +, N.C. +, Ohio +, Utah +, Vt. +, Va. +, Colo. +, Ala. +, Ark. +, Iowa +, Idaho +, N.Mex. +, Maine +, Tex. +, Kans. +, Mont. +, Mo. +  and Miss. +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
bisexual +  and fertile +
round +  and compressed +
reduced +
reddish-brown +
flattened +  and ellipsoid +
0.1 cm1 mm <br />0.001 m <br /> (0.18 cm1.8 mm <br />0.0018 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 +, 2-veined +  and smooth +
acute +  and obtuse +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
membranous +  and chartaceous +
sometimes longer +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
inconspicuous +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
concealed +  and prominent +
2 +  and 1 +
ovate +  and lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
membranous +
5cm +  and 30cm +
spikelike +
0.4 cm4 mm <br />0.004 m <br /> (1.6 cm16 mm <br />0.016 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 /> (6 cm60 mm <br />0.06 m <br />) +
spikelike +
stramineous +  and purplish-tinged +
30 +  and 90 +
rounded +  and laterally compressed +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
1 +  and 3 +
compound +  and simple +
2 (?) +  and 3 (?) +
Sporobolus asper var. hookeri +  and Sporobolus undefined var. asper +
Sporobolus compositus var. compositus +
Sporobolus compositus +
variety +
membranous +
slightly shorter or longer +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
quadrangular +, fusiform +, obovoid +  and ellipsoid +
7 (?) +  and 13 (?) +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +