Trisetum melicoides

(Michx.) Scribn.
Common names: False melic Trisete fausse-melique
Endemic
Synonyms: Trisetum melicoides var. majus
Treatment appears in FNA Volume 24. Treatment on page 745.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Plants perennial, with both fertile and sterile shoots; cespitose. Culms (20) 40-80 (100) cm, erect, smooth or scabridulous. Leaves concentrated below midlength on the culms; sheaths glabrous or pilose; ligules 1.5-3.5 mm, rounded or truncate; blades 10-20+ cm long, 2-9 mm wide, flat, lax. Panicles 8-20 cm long, usually 2-4 cm wide, lax, nodding, silvery-green or tan; lower branches to 5 cm, ascending, naked below, the spikelets imbricate distally. Spikelets 5-7 (9) mm, pedicellate, lanceovate, with 2 (4) florets; rachilla internodes and hairs 1.3-2 mm. Glumes unequal, widest at or below the middle; lower glumes 4-5.5 mm; upper glumes 5-7 mm long, nearly as long as the florets, wider than the lower glumes; callus hairs 1.5-2 mm; lemmas 5-6 mm, smooth or scabridulous, apices usually minutely bifid, sometimes entire, unawned or awned. awns to 2 mm, arising just below and rarely exceeding the apices; paleas shorter than the lemmas; anthers 0.6-0.8 mm. Caryopses about 3 mm, sparsely pubescent distally. 2n = 14.

Distribution

Maine, N.H., Vt., Mich., Wis., N.Y., N.B., Nfld. and Labr. (Labr.), N.S., Ont., Que.

Discussion

Trisetum melicoides is a native species that grows on moist, cool stream banks, gravelly shores, shaded rock ledges (especially calcareous ones), and in damp woods. It grows only in southeastern Canada and the northeastern United States. It is listed as endangered in Wisconsin, New York, and Maine. Plants with pilose sheaths have been called T. melicoides var. majus (A. Gray) Hitchc, but the trait varies within populations.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."prolonged" is not a number.

... more about "Trisetum melicoides"
membranous +  and scarious +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
awned +, entire +  and bifid +
John H. Rumely +
(Michx.) Scribn. +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
not evident +
2mm;9mm +
spikelike +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
False melic +  and Trisete fausse-melique +
extravaginal +  and basal +
pubescent +  and glabrous +
40 cm400 mm <br />0.4 m <br /> (80 cm800 mm <br />0.8 m <br />) +
not woody +
Maine +, N.H. +, Vt. +, Mich. +, Wis. +, N.Y. +, N.B. +, Nfld. and Labr. (Labr.) +, N.S. +, Ont. +  and Que. +
0 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
sterile +  and bisexual +
compressed +
reduced +
shorter or longer +
subtending +
unequal +
uncinate +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
diffuse +  and dense +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
scabridulous +  and smooth +
lanceolate +  and ovate +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
truncate +  and rounded +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
membranous +
inconspicuous +
usually slenderly lobed +  and fimbriate +
0 cm0 mm <br />0 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
concealed +  and prominent +
2 +  and 1 +
pubescent +  and glabrous +
well-developed +
2-keeled +
subequal +  and longer +
membranous +
tan +  and silvery-green +
8cm +  and 20cm +
spikelike +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
dry +  and fleshy +
pilose +  and glabrous +
sterile +  and fertile +
1 +  and 60 +
lanceovate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Trisetum melicoides var. majus +
Trisetum melicoides +
Trisetum +
species +
bristlelike +
membranous +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
parallel +  and converging +
plant +  and cespitose +
aquatic +  and terrestrial +