Dichanthium annulatum

(Forssk.) Stapf
Common names: Ringed dichanthium
Introduced
Synonyms: Andropogon nodosus
Treatment appears in FNA Volume 25. Treatment on page 638.

Plants perennial; stoloniferous. Culms to 100 cm, decumbent, erect portions generally to 60 cm, often branched above the bases, glabrous beneath the inflorescences; nodes glabrous or short-pubescent. Sheaths glabrous; ligules 1-1.8 mm, truncate; blades 3-30 cm long, 2-7 mm wide, scabrous, sparsely pilose, hairs some¬times papillose-based. Rames 2-9, 2.5-7 cm, subdigitate, erect to ascending, bases without spikelets, glabrous, internodes ciliate on the margins. Sessile spikelets 2.5-5 mm long, 1-1.5 mm wide; lower glumes elliptic or oblong, sparsely pubescent below, apices obtuse, irregularly 2-3-toothed, 5-9-veined; upper glumes 3-veined; awns 1.3-2.2 cm, twice-geniculate. Pedicellate spikelets 2.5-5 mm, usually staminate. 2n = 20, 40.

Distribution

Puerto Rico, Pacific Islands (Hawaii), Tex., La.

Discussion

Dichanthium annulatum is native to southeastern Asia and is a highly esteemed forage grass, especially in India. It is now established at scattered locations in Texas, Louisiana, and Florida.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Dichanthium annulatum"
2-3-toothed +  and obtuse +
anatomy +  and kranz +
Mary E. Barkworth +
(Forssk.) Stapf +
1 (?) +  and 3 (?) +
2 times-geniculate +
1.3 cm13 mm <br />0.013 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
keeled +  and rounded +
staminate +  and homomorphic +
sterile +  and homogamous +
subdigitate +
divergent +  and parallel +
erect +  and ascending +
intravaginal +, extravaginal +, branching +  and basal +
2 +  and 9 +
swelling +
2.5 cm25 mm <br />0.025 m <br /> (7 cm70 mm <br />0.07 m <br />) +
pseudopetiolate +
non-radiate +  and radiate +
well-developed +
3 cm30 mm <br />0.03 m <br /> (30 cm300 mm <br />0.3 m <br />) +
usually linear +  and lanceolate occasionally ovate +
reduced +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
spikelike +
Ringed dichanthium +
purple +  and reddish +
ascending +  and erect +
0 cm0 mm <br />0 m <br /> (100 cm1,000 mm <br />1 m <br />) +
not woody +
Puerto Rico +, Pacific Islands (Hawaii) +, Tex. +  and La. +
capillary +
sometimes longer +
concealing +
compressed +  and terete +
shorter or longer +
subtending +
compressed +  and rounded +
unequal +
terete;slightly flattened +
papillose-based +
uncinate +
bracteate +  and ebracteate +
pedunculate +  and multiple-stalked +
solid +  and hollow +
photosynthetic +
aromatic +
coriaceous +
0.1 cm1 mm <br />0.001 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
membranous +
inconspicuous +
oblong +  and elliptic +
complex +  and simple +
concealed +  and prominent +
short-pubescent +  and glabrous +
pedicellate +
heterogamous +  and homogamous +
flattened +  and terete to somewhat +
dry +  and fleshy +
0 cm0 mm <br />0 m <br /> (60 cm600 mm <br />0.6 m <br />) +
elongate +
subdigitate +  and digitate +
Introduced +
staminate +, pedicellate +  and sessile +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
2 +, 1 +  and many +
sterile +  and bisexual +
compressed +
usually smaller +  and reduced +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1mm +  and 1.5mm +
1 +  and 3 +
extensive +
fused +  and free +
2 +  and 3 +
dome--shaped +  and triangular +
Andropogon nodosus +
Dichanthium annulatum +
Dichanthium +
species +
membranous +
sessile-pedicellate +
bisexual +  and sterile +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +