Digitaria hitchcockii

(Chase) Stuck.
Treatment appears in FNA Volume 25. Treatment on page 366.

Plants perennial; rhizomatous, rhizomes short, giving the plants hard, knotty, much-branched bases. Culms 20-55 cm, erect, sometimes geniculate, not rooting at the lower nodes. Basal sheaths tomentose; culm sheaths glabrous or variously pubescent (puberulent, ciliate, or sparsely hirsute); ligules (0.1) 0.5-1 (1.5) mm, ciliate; blades 2-5.5 cm long, 2-3 mm wide. Panicles with 3-6 spikelike primary branches on 6-10 (15) cm rachises; primary branches 1-6 cm, not or only narrowly winged, bearing spikelets in unequally pedicellate pairs, pedicels not adnate to the branch axes; shorter pedicels 1.5-2 mm; longer pedicels 3-4 mm. Spikelets homomorphic, 2.5-3.1 mm (including pubescence), 2.4-3 mm (excluding pubescence). Lower glumes 0.3-1 mm, veinless; upper glumes 2.1-3 mm (including pubescence), as long as or exceeding the upper florets by no more than 0.5 mm, 3-veined, densely appressed-pubescent, hairs 0.5-1 mm, white to purple, tapering or parallel-sided, not spreading at maturity; lower lemmas 2.3-3.1 mm (including pubescence), as long as or exceeding the upper lemmas by up to 0.5 mm, 5-veined, veins equally spaced, intercostal regions densely appressed-pubescent, hairs 0.5-1 mm, white to purple, tapering or parallel-sided, not spreading at maturity; upper lemmas 2.2-2.5 mm, brown when immature, dark-brown at maturity. Caryopses 2.1-3.4 mm. 2n = 36.

Discussion

Digitaria hitchcockii is an uncommon species of open, dry, gravelly slopes in southwestern Texas and northern Mexico.

Selected References

None.

Lower Taxa

None.

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

... more about "Digitaria hitchcockii"
Obtuse (?) +  and Acuminate (?) +
anatomy +  and kranz +
J.K. Wipff +
(Chase) Stuck. +
1 (?) +  and 3 (?) +
keeled +  and rounded +
much-branched +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
disarticulating +  and pseudopetiolate +
non-radiate +  and radiate +
2 cm20 mm <br />0.02 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
usually linear +  and lanceolate occasionally ovate +
2mm;3mm +
triquetrous +
spikelike +
not developed +
planoconvex +
0.21 cm2.1 mm <br />0.0021 m <br /> (0.34 cm3.4 mm <br />0.0034 m <br />) +
sometimes longer +
not rooting +
geniculate +
pubescent +  and glabrous +
20 cm200 mm <br />0.2 m <br /> (55 cm550 mm <br />0.55 m <br />) +
Virgin Islands +  and Tex. +
1/5 +  and 1/2 +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
unequal +
membranous +
parallel-sided +
white +  and purple +
not spreading +
tapering +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
bracteate +  and ebracteate +
appressed-pubescent +
solid +  and hollow +
cauline +  and basal +
coriaceous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
membranous +
inconspicuous +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.31 cm3.1 mm <br />0.0031 m <br />) +
complex +  and simple +
concealed +  and prominent +
2 +  and 1 +
pedicellate +
subterranean +
not adnate +
dry +  and fleshy +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
15 cm150 mm <br />0.15 m <br /> (?) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
in triplets +  and paired +
1 +  and 60 +
unisexual +  and bisexual +
compressed +, lanceoloid +  and ellipsoid +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
1 (?) +  and 3 (?) +
fused +  and free +
2 (?) +  and 3 (?) +
dome--shaped +  and triangular +
Gramineae +
Digitaria hitchcockii +
Digitaria +
species +
membranous +
appressed-pubescent +
0.21 cm2.1 mm <br />0.0021 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
dark-brown +  and brown +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
cartilaginous +, coriaceous +  and indurate +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +