Rhynchospora fusca

(Linnaeus) W. T. Aiton in W. Aiton and W. T. Aiton

in W. Aiton and W. T. Aiton, Hortus Kew. 1: 127. 1810.

Common names: Rhynchospore brun
Illustrated
Basionym: Schoenus fuscus Linnaeus Sp. Pl. ed. 2, 2: 1664. 1763
Synonyms: Phaeocephalum fuscum (Linnaeus) House Rhynchospora alba var. fusca (Linnaeus) Vahl
Treatment appears in FNA Volume 23. Treatment on page 232. Mentioned on page 206, 233.
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Plants perennial, cespitose, 10–50 cm; rhizomes stoloniferous, slender. Culms erect to excurved, filiform, leafy, ± terete. Leaves shorter than culm; blades ascending, filiform, proximally to 1.5 (–2) mm wide, apex trigonous, tapering, setaceous. Inflorescences: lateral spikelet clusters (0–) 1–2, distant, terminal cluster ellipsoid to broadly turbinate or hemispheric, branches ascending; leafy bracts setaceous, overtopping clusters. Spikelets redbrown to deep brown, lanceoloid, (4–) 5–6 (–7) mm, apex acute; fertile scales lanceolate, 4–5 (–6) mm, apex acuminate, midrib often excurrent as awn. Flowers: bristles 5–6, longest reaching at least past tubercle base, mostly to tip or beyond, antrorsely barbellate. Fruits 2 (–3) per spikelet, (2.3–) 2.5–2.6 (–3) mm with pedicellar joint, receptacle, and tubercle; body lustrous, pale-brown to deep brown, obovoid to ellipsoid, lenticular, 1–1.5 × 1 mm, margins narrow, flowing to tubercle; surfaces longitudinally finely lined, transversely very finely ridged with wavy rows of very narrow, vertical lattices, sometimes also with lines of shallow pits; tubercle triangularsubulate, (0.7–) 1–1.3 (–1.5) mm, base lunate, margins setulose proximally.


Phenology: Fruiting summer–fall.
Habitat: Sands and peats of pond shores, bogs, and seeps
Elevation: 0–400 m

Distribution

V23 411-distribution-map.jpg

N.B., Nfld. and Labr., N.S., Ont., Que., Sask., Conn., Del., Ill., Ind., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., Pa., R.I., Vt., Wis., Europe

Discussion

Selected References

None.

Lower Taxa

None.

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

... more about "Rhynchospora fusca"
acuminate;acute;setaceous;tapering;trigonous +
Robert Kral +
(Linnaeus) W. T. Aiton in W. Aiton and W. T. Aiton +
Schoenus fuscus +
scabridulous +  and scabrid +
filiform +
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
pale-brown +  and deep 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 +
lenticular +, obovoid +  and ellipsoid +
1 cm10 mm <br />0.01 m <br /> (?) +
ascending +  and appressed +
setaceous +
parallel +  and divergent +
terete +, rolled +  and plicate +
Rhynchospore brun +
terete +, filiform +  and excurved +
N.B. +, Nfld. and Labr. +, N.S. +, Ont. +, Que. +, Sask. +, Conn. +, Del. +, Ill. +, Ind. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, N.H. +, N.J. +, N.Y. +, Pa. +, R.I. +, Vt. +, Wis. +  and Europe +
0–400 m +
distalmost +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
biconvex +  and trigonous +
Sands and peats of pond shores, bogs, and seeps +
racemose +, corymbose +  and paniculate +
erect +, rarely +  and spreading +
distant +  and cluster +
ellipsoid +  and broadly turbinate or hemispheric +
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 summer–fall. +
2-3(-4)-carpellate +
shallow +
3 (?) +  and 1 (?) +
in W. Aiton and W. T. Aiton, Hortus Kew. +
stoloniferous +
adventitious +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
basal +  and proximal +
lanceolate +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
cylindric +
Illustrated +
redbrown +  and deep brown +
1 +, 3 +  and 100 +
lanceoloid +
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 fuscum +  and Rhynchospora alba var. fusca +
Rhynchospora fusca +
Rhynchospora +
species +
sulcate +  and 2-edged +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
flattened +, terete +, triangular +  and conic +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
plant +  and cespitose +