Rhynchospora eximia

(Nees) Boeckeler

Linnaea 37: 601. 1873.

Illustrated
Basionym: Spermodon eximius Nees in B. Seemann, Bot. Voy. Herald, 222. 1854
Synonyms: Psilocarya schiedeana (Nees) Liebmann Rhynchospora oxycephala C. Wright Rhynchospora psilocaroides Grisebach
Treatment appears in FNA Volume 23. Treatment on page 216. Mentioned on page 202, 215, 217.
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Plants perennial or annual, single or cespitose, (10–) 20–50 cm; rhizomes absent. Culms spreading to erect, leafy, obtusely triangular. Leaves often exceeding inflorescences; blades narrowly linear, proximally flat, 1–3 mm wide, apex trigonous, tapering. Inflorescences terminal and axillary, clusters of 1–5 corymbs; leafy bracts much exceeding corymbs. Spikelets few to several, on ascending, stiff, short-to-elongate branches, redbrown to brown, lanceoloid, (5–) 6–10 mm, apex acuminate; fertile scales many, ovate, shallowly convex, 5 mm, apex acuminate; midrib shortexcurrent or not. Flowers: perianth absent. Fruits 1.5 mm; body dark-brown to black, tumidly lenticular, nearly orbicular, 0.8–0.9 × 0.6–0.7 mm, margins grooved, discontinuous with tubercle; surfaces transversely wavyrugose, ridges of contiguous rows of vertical, linear, raised cells; tubercle broad, low triangular, 0.2–0.3 mm, crustaceous, base capping fruit summit, raised at ends, apex shortacuminate.


Phenology: Fruiting all year.
Habitat: Moist to wet sandy peaty swales, pond shores, depressions in savannas, moist waste areas
Elevation: 0–100[–1000] m

Distribution

V23 374-distribution-map.jpg

Fla., Mexico, West Indies, Central America, South America, Africa

Discussion

Rhynchospora eximia is often found at elevations from near sea level to over 1000 m in the tropics.

Selected References

None.

Lower Taxa

None.

"shortened" is not a number."wider" is not a number.

... more about "Rhynchospora eximia"
acuminate;acuminate;tapering;trigonous +
Robert Kral +
(Nees) Boeckeler +
2-lobed +  and lunate +
Spermodon eximius +
scabridulous +  and scabrid +
v--shaped +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
dark-brown +  and black +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
warty +, papillate +, alveolate +  and pitted +
orbicular +  and lenticular +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
2-ranked +  and arranged +
ascending +  and appressed +
short-to-elongate +
parallel +  and divergent +
terete +, rolled +  and plicate +
spreading +  and erect +
triangular +
Fla. +, Mexico +, West Indies +, Central America +, South America +  and Africa +
0–100[–1000] m +
distalmost +
1.5 cm15 mm <br />0.015 m <br /> (?) +
biconvex +  and trigonous +
Moist to wet sandy peaty swales, pond shores, depressions in savannas, moist waste areas +
erect +, rarely +  and spreading +
3-ranked +  and polystichous +
cauline +  and basal +
keeled;terete;keeled;terete +
revolute +  and involute +
decurrent +
plumed +  and barbed +
deciduous +  and persistent +
shorter or longer +
of 2-12(-20) bristles +
Fruiting all year. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
adventitious +
contiguous +
basal +  and proximal +
convex;ovate +
5 cm50 mm <br />0.05 m <br /> (?) +
cylindric +
Illustrated +
redbrown +  and brown +
few +  and several +
lanceoloid +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
2 +  and 3 +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
cleft +, 2-fid +  and undivided +
wavyrugose +
Psilocarya schiedeana +, Rhynchospora oxycephala +  and Rhynchospora psilocaroides +
Rhynchospora eximia +
Rhynchospora +
species +
sulcate +  and 2-edged +
triangular +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
crustaceous +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
annual +  and perennial +
plant +  and cespitose +