Digitaria patens

(Swallen) Henrard
Synonyms: Trichachne patens
Treatment appears in FNA Volume 25. Treatment on page 368.

Plants perennial; cespitose, neither rhizomatous nor stoloniferous. Culms 40-90 cm, erect, sometimes geniculate, not rooting, at the lower nodes. Leaves mainly cauline; basal sheaths villous; upper sheaths glabrous or sparsely to densely hirsute, hairs papillose-based; ligules (1) 1.5-4 mm, entire to lacerate; blades 5-15 cm long, 1-4 mm wide, glabrous or sparsely pubescent. Panicles with 4-10 spikelike primary branches on (4) 10-18 cm rachises; primary branches 4-10 cm, usually divergent at maturity, varying to ascending, axes not wing-margined, bearing spikelets in unequally pedicellate pairs; internodes (4.5) 6-15 mm (midbranch); secondary branches rarely present; shorter pedicels 2-2.5 mm; longer pedicels 7-8 mm; terminal pedicels of primary branches 7.4-20 mm. Spikelets homomorphic, 3.7-5.8 mm (including pubescence), 2.9-4.3 mm (excluding pubescence). Lower glumes 0.3-0.5 mm; upper glumes 2.4-3.5 mm (excluding pubescence), 3-veined, densely villous, hairs 1.5-4 mm, silvery-white to purple, spreading at maturity; lower lemmas 2.8-4.2 mm (excluding pubescence), exceeding the upper lemmas by 0.8-2.2 mm, 5-veined and the veins equally spaced or 7-veined and the lateral-veins closer to each other than to the central vein, margins densely villous, hairs 1.5-4 mm, silvery-white to purple, spreading at maturity, apices acuminate; upper lemmas 2.6-3.2 mm, lanceolate, brown when immature, dark-brown at maturity, acuminate. 2n = 72.

Discussion

Digitaria patens is endemic to southwestern and southern Texas and adjacent Mexico. It grows in well-drained, usually sandy, soils, often in disturbed habitats. Gould (1975) suggested that it might be an octoploid derivative of D. californica.

Selected References

None.

Lower Taxa

None.

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

... more about "Digitaria patens"
anatomy +  and kranz +
J.K. Wipff +
(Swallen) Henrard +
1 (?) +  and 3 (?) +
not wing-margined +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
disarticulating +  and pseudopetiolate +
non-radiate +  and radiate +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
pubescent +  and glabrous +
usually linear +  and lanceolate occasionally ovate +
1mm;4mm +
triquetrous +
0.74 cm7.4 mm <br />0.0074 m <br /> (2 cm20 mm <br />0.02 m <br />) +
spikelike +
not developed +
planoconvex +
sometimes longer +
not rooting +
geniculate +
40 cm400 mm <br />0.4 m <br /> (90 cm900 mm <br />0.9 m <br />) +
1/5 +  and 1/2 +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
unequal +
membranous +
papillose-based +
silvery-white +  and purple +
uncinate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
bracteate +  and ebracteate +
solid +  and hollow +
4.5 cm45 mm <br />0.045 m <br /> (?) +
0.6 cm6 mm <br />0.006 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
coriaceous +
entire +  and lacerate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
membranous +
inconspicuous +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
complex +  and simple +
concealed +  and prominent +
2 +  and 1 +
pedicellate +
subterranean +
dry +  and fleshy +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
4 cm40 mm <br />0.04 m <br /> (?) +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
in triplets +  and paired +
1 +  and 60 +
unisexual +  and bisexual +
compressed +, lanceoloid +  and ellipsoid +
0.29 cm2.9 mm <br />0.0029 m <br /> (0.43 cm4.3 mm <br />0.0043 m <br />) +
1 (?) +  and 3 (?) +
fused +  and free +
2 (?) +  and 3 (?) +
dome--shaped +  and triangular +
Trichachne patens +
Digitaria patens +
Digitaria +
species +
membranous +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
dark-brown +  and brown +
acuminate +  and lanceolate +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
cartilaginous +, coriaceous +  and indurate +
glabrous or +  and sparsely densely hirsute +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
stoloniferous +  and rhizomatous +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +