Sporobolus coahuilensis

Valdés-Reyna
Treatment appears in FNA Volume 25.

Plants annual. Culms 15-60 cm, ascending, glabrous. Sheaths shorter than the internodes, glabrous; ligules 0.5-1 mm, ciliate; blades 4-12 cm long, 1.5-6 mm wide, flat, spreading, evenly distributed, adaxial surfaces sparsely ciliate-pustulate. Panicles 6-22 cm long, (1) 5-13 cm wide, open, sometimes contracted; branches terminating in a spikelet, lowest branches whorled, in verticels of 7-20; pedicels (2) 3-6 (8) mm, widely spreading, capillary. Spikelets 1.1-1.5 mm. Glumes thin, acute; lower glumes about 0.5 mm; upper glumes 1.1-1.5; lemmas 1.1-1.4 mm, acute; paleas 1-1.3 mm, hyaline. Fruits 0.6-0.9 mm, oblong, light-brown; embryos 0.2-0.4 mm.

Discussion

Sporobolus coahuilensis is primarily known from central Coahuila in Mexico. It has recently been found in Brewster and Hudspeth counties, Texas (Turner 2004). It is not clear whether it has been overlooked in the past or is a recent introduction. Sporobolus coahuilensis appears to be closely related to the widespread species S. pyramidatus, from which it differs in its long capillary pedicels and usually wider panicles.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Sporobolus coahuilensis"
quadrangular +, fusiform +, obovoid +  and ellipsoid +
ciliate-pustulate +
Paul M. Peterson +, Stephan L. Hatch +  and Alan S. Weakley +
Valdés-Reyna +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
distributed +
4 cm40 mm <br />0.04 m <br /> (12 cm120 mm <br />0.12 m <br />) +
pubescent +  and glabrous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
spikelike +
triangular +  and dome--shaped +
sometimes longer +
membranous +
15 cm150 mm <br />0.15 m <br /> (60 cm600 mm <br />0.6 m <br />) +
not woody +
Conn. +, N.J. +, N.Y. +, Wash. +, Va. +, W.Va. +, Del. +, D.C +, Wis. +, Ariz. +, N.Mex. +, Pacific Islands (Hawaii) +, Mich. +, N.Dak. +, Alta. +, B.C. +, Man. +, N.B. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Mass. +, Maine +, N.H. +, R.I. +, Vt. +, Fla. +, Miss. +, Utah +, Wyo. +, Oreg. +, Tex. +, La. +, S.C. +, N.C. +, Nebr. +, Tenn. +, Pa. +, Ala. +, Iowa +, Ill. +, Ind. +, Ky. +, Md. +, Ohio +, Nev. +, Puerto Rico +, Kans. +, Mo. +, Okla. +, Colo. +, Ga. +, Virgin Islands +, Calif. +, Ark. +, Idaho +, Minn. +, S.Dak. +  and Mont. +
not waisted +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
capillary +
pistillate +  and staminate +
sometimes longer +
bisexual +  and fertile +
round +  and compressed +
reduced +
light-brown +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
shorter or longer +
subtending +
uncinate +
paniculate +  and racemose +
hollow +  and solid +
not absent +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
chartaceous +  and membranous +
sometimes longer +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
inconspicuous +
0.5 cm5 mm <br />0.005 m <br /> (?) +
concealed +  and prominent +
2 +  and 1 +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
6cm +  and 22cm +
5 cm50 mm <br />0.05 m <br /> (13 cm130 mm <br />0.13 m <br />) +
2 cm20 mm <br />0.02 m <br /> (?) +
capillary +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
mucilaginous +
adherent +  and free +
dry +  and fleshy +
spikelike +
turner2004a +
1 +  and 60 +
rounded +  and laterally compressed +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
1 +  and 3 +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Sporobolus coahuilensis +
Sporobolus +
species +
membranous +
1.1 +  and 1.5 +
quadrangular +, fusiform +, obovoid +  and ellipsoid +
7 (?) +  and 13 (?) +
stoloniferous +  and rhizomatous +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +