Rhynchospora rariflora

(Michaux) Elliott

Sketch Bot. S. Carolina 1: 58. 1816.

Illustrated
Basionym: Schoenus rariflorus Michaux Fl. Bor.-Amer. 1: 35. 1803
Synonyms: Phaeocephalum rariflorum (Michaux) House
Treatment appears in FNA Volume 23. Treatment on page 221. Mentioned on page 201, 204, 220, 222.
Please click on the illustration for a higher resolution version.
Illustrator:

Copyright:

Plants perennial, densely cespitose, 15–60 cm; rhizomes compact, branching, slender. Culms lax,filiform, leafy, terete, grooved. leaves ascending to erect, exceeded by culm, blades lax, filiform, margins proximally deeply involute, apex trigonous, tapering. Inflorescences mostly cymose clusters, simple or compound, 1–3 (–4), widely spaced, loose, narrowly to broadly turbinate;, branchies capillary, ascending to spreading, leafy bracts setaceous, exceeded by or exceeding cymes. Spikelets light-redbrown or brown, lanceovoid to fusiform, 3–4 (–4.5) mm, apex acuminate, fertile scales ovate, mostly 2–3 mm, apex rounded to acute, midrib included or shortexcurrent. Flowers: perianth bristles mostly 6, unequal, rarely extending past fruit midbody, antrorsely barbellate. Fruits 1–4 per spikelet, 1.8–2 mm, body yellowbrown to brown, lustrous, tumidly obovoidlenticular, 1–1.5 × 1–1.5 mm, surfaces transversely wavyrugose, intervals vertically striate with narrow alveolae, tubercle flat, triangular, 0.3–0.6 mm.


Phenology: Fruiting spring–summer or all year (south).
Habitat: Sands or peats of low savannas, seeps, bogs, flatwoods, pond shores, stream banks
Elevation: 0–400 m

Distribution

V23 386-distribution-map.jpg

Ala., Ark., Fla., Ga., La., Md., Miss., N.J., N.C., Okla., S.C., Tenn., Tex., Va., Mexico, West Indies, Central America

Discussion

Rhynchospora rariflora forms solid tussocks by means of short, forking, compact masses of rhizomes.

Selected References

None.

Lower Taxa

None.

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

... more about "Rhynchospora rariflora"
rounded;acute +
Robert Kral +
(Michaux) Elliott +
2-lobed +  and lunate +
Schoenus rariflorus +
scabridulous +  and scabrid +
filiform +
yellowbrown +  and brown +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
warty +, papillate +, alveolate +  and pitted +
ridged +, terete +, lenticular +  and flattened +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
2-ranked +  and arranged +
ascending +  and appressed +
setaceous +
parallel +  and divergent +
terete +, rolled +  and plicate +
grooved +  and leafy +
terete +  and filiform +
Ala. +, Ark. +, Fla. +, Ga. +, La. +, Md. +, Miss. +, N.J. +, N.C. +, Okla. +, S.C. +, Tenn. +, Tex. +, Va. +, Mexico +, West Indies +  and Central America +
0–400 m +
distalmost +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
biconvex +  and trigonous +
Sands or peats of low savannas, seeps, bogs, flatwoods, pond shores, stream banks +
branchy +, compound +, simple +  and cymose +
spaced +  and cluster +
ascending +  and spreading +
capillary +  and turbinate +
erect +, rarely +  and spreading +
3-ranked +  and polystichous +
ascending;erect +
cauline +  and basal +
keeled;terete;keeled;terete +
shortexcurrent +  and included +
decurrent +
plumed +  and barbed +
deciduous +  and persistent +
shorter or longer +
of 2-12(-20) bristles +
Fruiting spring–summer or all year (south). +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
Sketch Bot. S. Carolina +
adventitious +
basal +  and proximal +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
cylindric +
Illustrated +
brown +  and light-redbrown +
1 +, 3 +  and 100 +
lanceovoid;fusiform +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
2 +  and 3 +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
cleft +, 2-fid +  and undivided +
wavyrugose +
Phaeocephalum rariflorum +
Rhynchospora rariflora +
Rhynchospora +
species +
sulcate +  and 2-edged +
triangular +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
plant +  and cespitose +