Chasmanthium latifolium

(Michx.) H.O. Yates
Endemic
Synonyms: Uniola latifolia
Treatment appears in FNA Volume 25. Treatment on page 345.

Culms to 150 cm, 2-4 mm thick at the nodes, rarely branched, leafy for 80% of their height. Sheaths glabrous; collars glabrous; ligules 0.7-1 mm, entire; blades (7) 9-18 (22) cm long, (4) 10-22 mm wide, lanceolate-fusiform, usually glabrous, sometimes pilose adaxially. Panicles (8) 10-25 (35) cm, open, lax; branches nodding or drooping; axils of panicle branches sparsely pilose; pedicels 10-30 mm. Spikelets 15-40 (50) mm long, 6-16 (20) mm wide, with 6-17 (26) florets, lower 1-3 florets sterile, fertile florets diverging to 45°. Lower glumes 4.2-9.1 mm, 5-7-veined; upper glumes 4.7-8.7 mm, 5-9-veined; calluses pilose; fertile lemmas 9-12.5 mm, straight, 11-15-veined, keels winged, wings scabrous to pilose their full length; paleas 4.6-7.7 mm; anthers (0.4) 0.6-2.6 (3.5) mm, the length varying within a spikelet. Caryopses 2.9-5 mm, enclosed, rarely exposed at maturity. 2n = 48.

Distribution

Del., Wis., W.Va., Fla., N.J., Tex., La., Tenn., N.C., S.C., Pa., D.C., N.Mex., Va., Ala., Ark., Ill., Ga., Ind., Iowa, Ariz., Md., Kans., Okla., Ohio, Mo., Mich., Miss., Ky.

Discussion

Chasmanthium latifolium grows along stream and river banks and in rich deciduous woods. It is the most widespread species of the genus, extending further west and east than any of the other four species. The map shows its verifiable range. Yates (1966b) reported seeing one specimen each from New Jersey, New Mexico, and Manitoba, but none of the specimens had clear locality information. In the absence of any other specimens from these regions, the locality data on these three specimens are regarded as probably erroneous.

Flowering in Chasmanthium latifolium is sometimes cleistogamous.

Selected References

None.

Lower Taxa

None.

"varying" is not a number."leafy" is not a number."decumbent" is not a number."full" is not a number.

... more about "Chasmanthium latifolium"
0.4 cm4 mm <br />0.004 m <br /> (?) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
Acuminate (?) +  and Acute (?) +
J. Gabriel Sanchez-Ken +  and Lynn G. Clark +
(Michx.) H.O. Yates +
1 (?) +  and 3 (?) +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
not pseudopetiolate +
9 cm90 mm <br />0.09 m <br /> (18 cm180 mm <br />0.18 m <br />) +
pilose +  and glabrous +
lanceolate-fusiform +
10mm;22mm +
drooping;nodding +
spikelike +
brown +  and reddish-black or black +
compressed +
0.29 cm2.9 mm <br />0.0029 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
fusoidlike +
ascending +  and erect +
0 cm0 mm <br />0 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
not woody +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Del. +, Wis. +, W.Va. +, Fla. +, N.J. +, Tex. +, La. +, Tenn. +, N.C. +, S.C. +, Pa. +, D.C. +, N.Mex. +, Va. +, Ala. +, Ark. +, Ill. +, Ga. +, Ind. +, Iowa +, Ariz. +, Md. +, Kans. +, Okla. +, Ohio +, Mo. +, Mich. +, Miss. +  and Ky. +
less +  and 1/3 +
large +  and small +
capillary +
pistillate +  and staminate +
sometimes longer +
basal +  and distal +
rudimentary +
6 +  and 17 +
fertile +  and sterile +
round +  and compressed +
reduced +
(2)3-9-veined +
subtending +
acute +  and acuminate +
subequal +
membranous +
uncinate +
subbasal +  and basal +
hollow +  and solid +
11-15-veined +
straight +
compressed-keeled +
0.9 cm9 mm <br />0.009 m <br /> (1.25 cm12.5 mm <br />0.0125 m <br />) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
membranous +
inconspicuous +
0.42 cm4.2 mm <br />0.0042 m <br /> (0.91 cm9.1 mm <br />0.0091 m <br />) +
concealed +  and prominent +
2 +  and 1 +
well-developed +
2-keeled +  and gibbous +
0.46 cm4.6 mm <br />0.0046 m <br /> (0.77 cm7.7 mm <br />0.0077 m <br />) +
8 cm80 mm <br />0.08 m <br /> (?) +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
dry +  and fleshy +
staminate +, pistillate +, subsessile +, pedicellate +  and solitary +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1 +  and 60 +
compressed +
0.4 cm4 mm <br />0.004 m <br /> (5 cm50 mm <br />0.05 m <br />) +
6mm +  and 16mm +
free +  and fused +
triangular +  and dome--shaped +
Uniola latifolia +
Chasmanthium latifolium +
Chasmanthium +
species +
membranous +
0.47 cm4.7 mm <br />0.0047 m <br /> (0.87 cm8.7 mm <br />0.0087 m <br />) +
plant +, colonial +  and cespitose +
aquatic +  and terrestrial +
scabrous +  and pilose +