Tridens strictus

(Nutt.) Nash
Common names: Longspike tridens
Endemic
Treatment appears in FNA Volume 25. Treatment on page 34.

Plants with hard, knotty, shortly rhizomatous bases. Culms 50-170 cm, stiffly erect. Sheaths rounded, glabrous except for a few hairs on either side of the collar; ligules about 0.5 mm, membranous, ciliate; blades 2-8 mm wide, flat or loosely infolded, glabrous, tapering to the apices. Panicles 10-30 (36) cm long, 1-2 cm wide; branches to 6 cm, erect or appressed; pedicels 1-1.5 mm, glabrous. Spikelets 4-7 mm, with 5-11 florets. Glumes 4-7 mm, always conspicuously exceed¬ing and often twice as long as the adjacent lemmas, usually equaling or exceeding the distal florets, glabrous, 1-veined, tapering to acuminate apices; calluses pilose; lemmas (2) 3-3.5 mm, veins pilose to well above midlength, lateral-veins often excurrent; paleas 2-3 mm, bases not bowed-out; anthers 1-1.5 mm. Caryopses 1-1.5 mm. 2n = 40.

Distribution

Pa., Kans., Okla., Miss., Tex., La., Mo., Ala., Tenn., N.C., S.C., Va., Ark., Ill., Ga., Ky., Fla.

Discussion

Tridens strictus grows in open woods, old fields, right of ways, and coastal grasslands. It is endemic to the United States.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Tridens strictus"
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
rounded to truncate +
emarginate to bilobed +
Jesus Valdes-Reyna +
(Nutt.) Nash +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
keeled +  and rounded +
rhizomatous +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
not pseudopetiolate +
6 cm60 mm <br />0.06 m <br /> (25 cm250 mm <br />0.25 m <br />) +
tapering +, infolded +  and flat +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
appressed;erect +
spikelike +
0 cm0 mm <br />0 m <br /> (6 cm60 mm <br />0.06 m <br />) +
reniform +  and compressed +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Longspike tridens +
50 cm500 mm <br />0.5 m <br /> (170 cm1,700 mm <br />1.7 m <br />) +
not woody +
Pa. +, Kans. +, Okla. +, Miss. +, Tex. +, La. +, Mo. +, Ala. +, Tenn. +, N.C. +, S.C. +, Va. +, Ark. +, Ill. +, Ga. +, Ky. +  and Fla. +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
5 +  and 11 +
sterile +  and bisexual +
round +  and compressed +
reduced +
shorter or longer +
subtending +
tapering +  and acuminate +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
exceeding the distal florets +  and equaling +
uncinate +
paniculate +  and racemose +
5 cm50 mm <br />0.05 m <br /> (40 cm400 mm <br />0.4 m <br />) +
hollow +  and solid +
not absent +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
membranous +
sometimes longer +
0.5 cm5 mm <br />0.005 m <br /> (?) +
membranous +
adnate +  and free +
inconspicuous +
not thick +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
concealed +  and prominent +
2 +  and 1 +
pubescent +  and glabrous +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
10cm +  and 30cm +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
dry +  and fleshy +
spikelike +
stoloniferous +
elongate +  and knotty +
1 +  and 60 +
compressed +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1 +  and 3 +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Tridens strictus +
species +
membranous +
7 (?) +  and 13 (?) +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +