Rhynchospora baldwinii

A. Gray

Ann. Lyceum Nat. Hist. New York 3: 210. 1835.

IllustratedEndemic
Synonyms: Phaeocephalum baldwinii (A. Gray) House
Treatment appears in FNA Volume 23. Treatment on page 237. Mentioned on page 207, 230.
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Plants perennial, cespitose, 40–100 cm; rhizomes absent. Culms stiffly erect to ascending, linear, leafy toward base, sharply trigonous, angles scabrid. Leaves shorter than culm; basal leaves forming strong rosette, shortlinear, flat, 3–5 mm wide, distal more widely spaced, narrower, apex shortacuminate, trigonous. Inflorescences: spikelet clusters 1 (–2), if 2 then closely-set; terminal cluster mostly dense, hemispheric; proximalmost leafy bract subulate, much exceeding clusters. Spikelets dark redbrown, ovoid, (4–) 5–6 mm, apex acute; fertile scales ovate, mostly 4–4.5 mm, apex excurvedcuspidate. Flowers: bristles 12, reaching to or slightly beyond tubercle tip, antrorsely barbellate. Fruits 1–2 per spikelet, 3–3.5 (–3.7) mm; body dark-brown with paler center, dull, broadly ellipsoidlenticular, 2–2.5 × 1.8–2 mm, smooth, margins flowing to tubercle; tubercle flat, concavely triangular, 0.7–1 (–1.2) mm.


Phenology: Fruiting spring–fall.
Habitat: Sandy peats in low savannas, pine flatwoods, seeps, and bogs
Elevation: 0–100 m

Distribution

V23 423-distribution-map.jpg

Ala., Fla., Ga., La., Miss., N.C., S.C.

Discussion

Selected References

None.

Lower Taxa

None.

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

... more about "Rhynchospora baldwinii"
acute;trigonous +
Robert Kral +
A. Gray +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
2-lobed +  and lunate +
scabridulous +  and scabrid +
v--shaped +
dark-brown +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
warty +, papillate +, alveolate +  and pitted +
ridged +, terete +, lenticular +  and flattened +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
ascending +  and appressed +
subulate +
parallel +  and divergent +
terete +, rolled +  and plicate +
stiffly erect +  and ascending +
trigonous +
Ala. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +  and S.C. +
0–100 m +
distalmost +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.37 cm3.7 mm <br />0.0037 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
biconvex +  and trigonous +
Sandy peats in low savannas, pine flatwoods, seeps, and bogs +
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 spring–fall. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
Ann. Lyceum Nat. Hist. New York +
adventitious +
basal +  and proximal +
0.4 cm4 mm <br />0.004 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
cylindric +
Illustrated +  and Endemic +
dark redbrown +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
2 +  and 3 +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
cleft +, 2-fid +  and undivided +
Phaeocephalum baldwinii +
Rhynchospora baldwinii +
Rhynchospora +
species +
sulcate +  and 2-edged +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
triangular +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
plant +  and cespitose +