Difference between revisions of "Fimbristylis perpusilla"

R. M. Harper ex Small & Britton

in J. K. Small, Fl. S.E. U.S., 188, 1327. 1903.

IllustratedEndemicConservation concern
Treatment appears in FNA Volume 23. Treatment on page 128. Mentioned on page 122, 127.
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name=Fimbristylis perpusilla
|authority=R. M. Harper ex Small & Britton in J. K. Small
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|publication title=in J. K. Small, Fl. S.E. U.S.,
 
|publication title=in J. K. Small, Fl. S.E. U.S.,
 
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|species=Fimbristylis perpusilla

Latest revision as of 20:39, 5 November 2020

Plants annual, delicate, cespitose, slender, 2–15 cm; rhizomes absent. Leaves polystichous, spreading to ascending, mostly excurved, exceeding or exceeded by culms; sheaths entire, backs glabrous; ligule absent; blades setaceous-filiform, to 0.5 mm wide, flat to involute, sparsely scabrid-ciliate. Inflorescences: anthelae mostly simple, open, nearly as broad as long, ascending-branching, umbelliform, of 3–10 cormose spikelets; scapes filiform, 0.5–0.6 mm thick; proximalmost involucral bracts setaceous-bladed, exceeding anthela. Spikelets pale green to light brown, ovoid to globose or short-cylindric, 2–5 mm; fertile scales lance-linear to oblong-linear, 1.5 mm, glabrous, midrib strongly excurrent, erect to excurved cusp. Flowers: stamens 1; styles 2-fid, slender, glabrous. Achenes pale brown with iridescent tints, curved-cylindric, 0.4–0.6 mm, finely reticulate, in 12 vertical rows of narrowly rectangular, horizontal cells. 2n = 10.


Phenology: Fruiting summer–fall.
Habitat: Fluctuating sandy-silty shores of shallow ponds, pine savanna pools, reservoirs, ditches, and canals
Elevation: 0–100(–200) m

Distribution

V23 197-distribution-map.jpg

Del., Ga., Md., N.C., S.C., Tenn., Va.

Discussion

Of conservation concern.

The nearest relative of this ephemeral is Fimbristylis dipsacea, a similarly diminutive Eurasian and South American annual with broader, more spreadingcusped spikelets and oddly compound-papillate fruit.

Selected References

None.

Lower Taxa

None.
... more about "Fimbristylis perpusilla"
Robert Kral +
R. M. Harper ex Small & Britton in J. K. Small +
Del. +, Ga. +, Md. +, N.C. +, S.C. +, Tenn. +  and Va. +
0–100(–200) m +
Fluctuating sandy-silty shores of shallow ponds, pine savanna pools, reservoirs, ditches, and canals +
Fruiting summer–fall. +
in J. K. Small, Fl. S.E. U.S., +
Fimbristylis perpusilla +
Fimbristylis +
species +