Rhynchospora capillacea

Torrey

Fl. N. Middle United States 1: 55. 1823.

Common names: Rhynchospore capillaire
IllustratedEndemic
Basionym: Rhynchospora setacea (Muhlenberg) MacMillan 1892
Synonyms: Phaeocephalum capillaceum (Torrey) Farwell Triodon capillaceus (Torrey) Farwell
Treatment appears in FNA Volume 23. Treatment on page 213. Mentioned on page 202, 214.
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Plants perennial, cespitose, 10–40 cm, wiry; rhizomes stoloniferous, slender, to 1.5 mm thick. Culms erect or curved, leafy, filiform, angularly fewribbed. Leaves ascending-excurved, overtopped by culm; blades filiform, involute, apex setaceous. Inflorescences: spikelet clusters 1–2 (–3), often sparse, ellipsoid or narrowly turbinate, less than 1 cm wide; subtending foliaceous bracts exceeding compounds. Spikelets erect or ascending, pale redbrown to brown, fusiform, 6–7 mm; fertile scales elliptic, 4 mm, apex rounded or acute, midrib shortexcurrent or not. Flowers: perianth bristles 6, overtopping tubercle base, mostly retrorsely barbellate, sometimes smooth [forma laeviseta (E. J. Hill) Fernald]. Fruits 1–4 (–5) per spikelet, 2.5–3 mm; body pale-brown, slender stipitate, ellipsoid, lenticular, 1.5–2 × 0.8–1 mm; surfaces longitudinally minutely striate, obscurely transversely lowrugose, dotted; tubercle narrowly triangularsubulate, flattened, 0.8–1.7 mm.


Phenology: Fruiting summer–fall.
Habitat: Moist to wet calcareous fens, seeps over limestones or calcareous rock, marsh meadows
Elevation: 0–1000 m

Distribution

V23 367-distribution-map.jpg

Alta., Man., N.B., Nfld. and Labr., Ont., Que., Sask., Ala., Ark., Conn., Ill., Ind., Iowa, Maine, Mass., Mich., Minn., Mo., N.H., N.J., N.Y., N.Dak., Ohio, Okla., Pa., R.I., S.Dak., Tenn., Tex., Vt., Va., Wis.

Discussion

The two beakrushes most commonly occurring in fens are Rhynchospora capillacea and R. capitellata.

Selected References

None.

Lower Taxa

None.

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

... more about "Rhynchospora capillacea"
acute;rounded;setaceous +
Robert Kral +
Torrey +
2-lobed +  and lunate +
Rhynchospora setacea +
scabridulous +  and scabrid +
filiform +
pale-brown +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
warty +, papillate +, alveolate +  and pitted +
lenticular +  and ellipsoid +
slender +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
parallel +  and divergent +
terete +, rolled +  and plicate +
Rhynchospore capillaire +
filiform +
Alta. +, Man. +, N.B. +, Nfld. and Labr. +, Ont. +, Que. +, Sask. +, Ala. +, Ark. +, Conn. +, Ill. +, Ind. +, Iowa +, Maine +, Mass. +, Mich. +, Minn. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.Dak. +, Ohio +, Okla. +, Pa. +, R.I. +, S.Dak. +, Tenn. +, Tex. +, Vt. +, Va. +  and Wis. +
0–1000 m +
distalmost +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
biconvex +  and trigonous +
Moist to wet calcareous fens, seeps over limestones or calcareous rock, marsh meadows +
racemose +, corymbose +  and paniculate +
erect +, rarely +  and spreading +
3-ranked +  and polystichous +
ascending-excurved +
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 +
3 (?) +  and 1 (?) +
Fl. N. Middle United States +
stoloniferous +
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
adventitious +
basal +  and proximal +
2-keeled +
4 cm40 mm <br />0.04 m <br /> (?) +
cylindric +
Illustrated +  and Endemic +
pale redbrown +  and brown +
fusiform;turbinate;ellipsoid +
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 +
Phaeocephalum capillaceum +  and Triodon capillaceus +
Rhynchospora capillacea +
Rhynchospora +
species +
sulcate +  and 2-edged +
flattened +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
plant +  and cespitose +