Rhynchospora solitaria

R. M. Harper

Bull. Torrey Bot. Club 28: 468. 1901.

IllustratedEndemicConservation concern
Treatment appears in FNA Volume 23. Treatment on page 238. Mentioned on page 207.
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Illustrator:

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Plants perennial, solitary or cespitose, 50–60 cm; rhizomes absent. Culms erect to ascending, narrowly linear, wandlike, terete, leafy proximal to middle. Leaves erect to ascending; blades proximally flat, 2.5–3.5 mm wide, apex tapering, tip abruptly blunt. Inflorescences terminal, cluster of spikelets crowded, broadly turbinate to hemispheric, to 1.5 cm wide; leafy bracts linearsetaceous, slightly exceeding cluster. Spikelets orangebrown, lancefusiform, 6–7 mm, apex acuminate; fertile scales lanceovate, 4–5 mm, apex acuminate with excurved awn to 1 mm. Flowers: bristles 3–4, some reaching tubercle tip, antrorsely barbellate. Fruits 1–2 per spikelet, 2–2.1 mm; body brown with paler center, obovoidlenticular, 1.5–1.7 × 1.2–1.3 mm, margins flowing to tubercle; surfaces finely transversely striate with minute pits; tubercle lowtriangular, 0.3–0.5 mm.


Phenology: Fruiting summer–fall.
Habitat: Sandy peat of depressions in pine flatwoods savannas, edges of hillside bogs
Elevation: 0–200 m

Discussion

Of conservation concern.

Rhynchospora solitaria appears to be the least common North American species of Rhynchospora with two of the five given localities apparently lost. The name “solitaria” is deceptive; the plants sometimes form small tufts of culms. The most distinctive feature in the field is the attractive orangebrown color of the narrow, acuminate, bristlescaled spikelets.

Selected References

None.

Lower Taxa

None.

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

... more about "Rhynchospora solitaria"
acuminate;acuminate;tapering +
Robert Kral +
R. M. Harper +
excurved +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
2-lobed +  and lunate +
scabridulous +  and scabrid +
v--shaped +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
warty +, papillate +, alveolate +  and pitted +
ridged +, terete +, lenticular +  and flattened +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
ascending +  and appressed +
parallel +  and divergent +
terete +, rolled +  and plicate +
erect +  and ascending +
proximal +  and middle +
terete +  and wand-like +
0–200 m +
distalmost +
0.2 cm2 mm <br />0.002 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
biconvex +  and trigonous +
Sandy peat of depressions in pine flatwoods savannas, edges of hillside bogs +
broadly turbinate +  and hemispheric +
0 cm0 mm <br />0 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
erect +, rarely +  and spreading +
3-ranked +  and polystichous +
erect;ascending +
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 summer–fall. +
2-3(-4)-carpellate +
minute +
3 (?) +  and 1 (?) +
Bull. Torrey Bot. Club +
adventitious +
basal +  and proximal +
lanceovate +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
cylindric +
Illustrated +, Endemic +  and Conservation concern +
1 +, 3 +  and 100 +
lancefusiform +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
2 +  and 3 +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
cleft +, 2-fid +  and undivided +
Dichromena +  and Psilocarya +
Rhynchospora solitaria +
Rhynchospora +
species +
sulcate +  and 2-edged +
flattened +, terete +, triangular +  and conic +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
plant +, cespitose +  and solitary +