Digitaria setigera

Roth
Introduced
Treatment appears in FNA Volume 25. Treatment on page 382.

Plants of indefinite duration. Culms to 120 cm tall, bases long-decumbent and rooting at the lower nodes. Sheaths with papillose-based hairs; ligules 2.5-3.5 mm; blades 4-28 cm long, 4-12 mm wide, scabrous, usually with some scattered papillose-based hairs on the base of the adaxial surfaces, sometimes with hairs all over. Panicles with 3-11 spikelike primary branches in 1-several whorls, rachises to 6 cm; primary branches 5-15 cm, axes wing-margined, wings more than 1/2 as wide as the midribs, lower and middle portions bearing spikelets in unequally pedicellate pairs; secondary branches absent; shorter pedicels 0.3-0.8 mm; longer pedicels 1.7-2.7 mm. Spikelets 2.4-3.5 mm, homomorphic, ovate. Lower glumes absent or to 0.1 mm; upper glumes 0.2-1.3 mm, 1/6 - 1/3 as long as the spikelets, 1-3-veined, margins and apices with appressed, white hairs about 0.5 mm, truncate or bilobed; lower lemmas (5) 7-veined, veins smooth or scabrous only over the distal 1/3, unequally spaced, margins and lateral intercostal regions silky-ciliate; upper lemmas tan or gray when immature, brown at maturity, acuminate; anthers 0.6-1.3 mm. 2n = 70, 72.

Distribution

Puerto Rico, Pacific Islands (Hawaii), Fla.

Discussion

Digitaria setigera is native to southeastern Asia. It is now established in tropical America, growing in disturbed habitats in Florida and Central America, and probably in tropical South America. It has often been confused with D. sanguinalis.

Plants in the Flora region belong to Digitaria setigera Roth var. setigera. Unlike plants of D. setigera var. calliblepharata (Henrard) Veldkamp, they do not have large, glassy hairs on their lower lemmas.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."elongated" is not a number.

... more about "Digitaria setigera"
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
bilobed +  and truncate +
Obtuse (?) +  and Acuminate (?) +
anatomy +  and kranz +
J.K. Wipff +
1 (?) +  and 3 (?) +
wing-margined +
keeled +  and rounded +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
disarticulating +  and pseudopetiolate +
non-radiate +  and radiate +
4 cm40 mm <br />0.04 m <br /> (28 cm280 mm <br />0.28 m <br />) +
usually linear +  and lanceolate occasionally ovate +
4mm;12mm +
triquetrous +
spikelike +
not developed +
planoconvex +
sometimes longer +
at aerial culm nodes +  and branching +
0 cm0 mm <br />0 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
decumbent +  and erect +
5 cm50 mm <br />0.05 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +
Puerto Rico +, Pacific Islands (Hawaii) +  and Fla. +
1/5 +  and 1/2 +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
unequal +
membranous +
papillose-based +
uncinate +
0.5 cm5 mm <br />0.005 m <br /> (?) +
bracteate +  and ebracteate +
solid +  and hollow +
cauline +  and basal +
coriaceous +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
membranous +
inconspicuous +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
bilobed +  and truncate +
complex +  and simple +
concealed +  and prominent +
2 +  and 1 +
pedicellate +
subterranean +
dry +  and fleshy +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Introduced +
in triplets +  and paired +
1 +  and 60 +
unisexual +  and bisexual +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
1 (?) +  and 3 (?) +
fused +  and free +
2 (?) +  and 3 (?) +
dome--shaped +  and triangular +
Gramineae +
Digitaria setigera +
Digitaria +
species +
membranous +
1/6 +  and 1/3 +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
brown +, gray +  and tan +
cartilaginous +, coriaceous +  and indurate +
perennial +  and annual +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +
1;several +
/2 +  and 1 +