Sporobolus diandrus

(Retz.) P. Beauv.
Synonyms: Sporobolus indicus var. flaccidus
Treatment appears in FNA Volume 25. Treatment on page 124.

Plants perennial; cespitose, not rhizomatous. Culms 30-80 cm. Sheaths keeled or rounded; ligules 0.2-0.5 mm; blades 10-30 cm long, 2-4 mm wide, flat, becoming folded. Panicles 15-35 cm long, 0.4-4 cm wide, contracted to rather lax and open; primary branches appressed to strongly ascending, without spikelets on the lower XA, lower branches much longer than the internodes; pedicels 0.1-3 mm. Spikelets 1.3-1.8 mm, plumbeous to greenish. Lower glumes 0.4-0.8 mm, acuminate to truncate; upper glumes 0.7-1 mm, usually less than H as long as the florets, rarely longer, faintly 1-veined, truncate, erose to denticulate; lemmas 1.2-1.6 (1.8) mm, elliptic, glabrous, 1-veined, acute to obtuse; paleas 1.4-1.8 mm, elliptic; anthers 2 (3), 0.5-0.8 mm. Fruits 0.7-0.9 mm, quadrangular, laterally compressed, reddish-brown, truncate. 2n = 12.

Distribution

Pacific Islands (Hawaii)

Discussion

Sporobolus diandrus is native from India to southeast Asia and Australia. It is not common in North America, being known only from a few counties in Florida, Mississippi, and Texas.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Sporobolus diandrus"
quadrangular +, fusiform +, obovoid +  and ellipsoid +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Paul M. Peterson +, Stephan L. Hatch +  and Alan S. Weakley +
(Retz.) P. Beauv. +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
pubescent +  and glabrous +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
spikelike +
triangular +  and dome--shaped +
sometimes longer +
membranous +
30 cm300 mm <br />0.3 m <br /> (80 cm800 mm <br />0.8 m <br />) +
not woody +
Pacific Islands (Hawaii) +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
bisexual +  and fertile +
round +  and compressed +
reduced +
reddish-brown +
compressed +  and quadrangular +
0.07 cm0.7 mm <br />7.0e-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 +
acute +  and obtuse +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
chartaceous +  and membranous +
sometimes longer +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
inconspicuous +
acuminate +  and truncate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
concealed +  and prominent +
2 +  and 1 +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
15cm +  and 35cm +
0.4 cm4 mm <br />0.004 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
mucilaginous +
adherent +  and free +
dry +  and fleshy +
appressed;strongly ascending +
spikelike +
rounded +  and keeled +
plumbeous +  and greenish +
1 +  and 60 +
rounded +  and laterally compressed +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
1 +  and 3 +
compound +  and simple +
2 (?) +  and 3 (?) +
Sporobolus indicus var. flaccidus +
Sporobolus diandrus +
Sporobolus +
species +
membranous +
denticulate +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
quadrangular +, fusiform +, obovoid +  and ellipsoid +
7 (?) +  and 13 (?) +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +