Rhynchospora macra

(C. B. Clarke ex Britton) Small

Man. S.E. Fl., 180. 1933.

Illustrated
Basionym: Rhynchospora alba var. macra C. B. Clarke ex Britton Trans. New York Acad. Sci. 11: 88. 1892 (as Rynchospora)
Synonyms: Phaeocephalum album var. macrum (C. B. Clarke ex Britton) Farwell Triodon albus var. macer (C. B. Clarke ex Britton) Farwell
Treatment appears in FNA Volume 23. Treatment on page 214. Mentioned on page 202, 213, 230.
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Plants perennial, cespitose, 40–80 cm; rhizomes absent. Culms erect, trigonous, multiribbed, rather stiff. Principal leaves overtopped by culm; blades narrowly linear, proximally flat, (1.5–) 2–3.5 mm wide, apex tapering, trigonous. Inflorescences: spikelet clusters 1–3, turbinate to hemispheric, 1.5–3 cm wide; subtending leafy bracts mostly exceeded by distal compound. Spikelets pale-brown to nearly white, fusiform, 4–5 (–7) mm, apex narrowly acute; fertile scales elliptic, 3.5–4 mm, apex narrowly acute, midrib excurrent as mucro. Flowers: perianth bristles (15–) 18–20, reaching tubercle tip, retrorsely barbellate. Fruits 1 per spikelet, 2.5–3.2 mm; body brown with pale center, obovoid distal to short stipe, lenticular, 1.7–2.2 × 0.8–1.5, margins narrow, wirelike, flowing into tubercle edges; tubercle flat, narrowly triangularsubulate, 0.8–1 mm.


Phenology: Fruiting late summer–fall.
Habitat: Sands and sandy peats of savanna bogs and seeps, pinelands
Elevation: 0–200 m

Distribution

V23 369-distribution-map.jpg

Ala., Fla., Ga., La., Miss., N.C., S.C., Tex., Central America (Nicaragua)

Discussion

Selected References

None.

Lower Taxa

None.

"wider" is not a number.

... more about "Rhynchospora macra"
Robert Kral +
(C. B. Clarke ex Britton) Small +
shortened +
2-lobed +  and lunate +
Rhynchospora alba var. macra +
scabridulous +  and scabrid +
v--shaped +
2mm;3.5mm +
0.8 +  and 1.5 +
warty +, papillate +, alveolate +  and pitted +
lenticular +  and obovoid +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
parallel +  and divergent +
terete +, rolled +  and plicate +
multiribbed +
trigonous +
Ala. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +, S.C. +, Tex. +  and Central America (Nicaragua) +
0–200 m +
distalmost +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
biconvex +  and trigonous +
Sands and sandy peats of savanna bogs and seeps, pinelands +
racemose +, corymbose +  and paniculate +
erect +, rarely +  and spreading +
3-ranked +  and polystichous +
cauline +  and basal +
wirelike +
revolute +  and involute +
decurrent +
plumed +  and barbed +
deciduous +  and persistent +
shorter or longer +
of 2-12(-20) bristles +
Fruiting late summer–fall. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
Man. S.E. Fl., +
adventitious +
basal +  and proximal +
2-keeled +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
cylindric +
Illustrated +
pale-brown +  and nearly white +
fusiform;turbinate;hemispheric +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1.5cm;3cm +
2 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
cleft +, 2-fid +  and undivided +
Phaeocephalum album var. macrum +  and Triodon albus var. macer +
Rhynchospora macra +
Rhynchospora +
species +
sulcate +  and 2-edged +
flattened +, terete +, triangular +  and conic +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
plant +  and cespitose +