Rhynchospora colorata

(Linnaeus) H. Pfeiffer

Repert. Spec. Nov. Regni Veg. 38: 89. 1935.

Illustrated
Basionym: Schoenus coloratus Linnaeus Sp. Pl. 1: 43. 1753 Scirpus cephalotes Walter 1788
Synonyms: Dichromena cephalotes Britton Dichromena colorata (Linnaeus) Hitchcock Dichromena leucocephala Michaux Rhynchospora drummondiana Steudel
Treatment appears in FNA Volume 23. Treatment on page 215. Mentioned on page 201, 216.
Please click on the illustration for a higher resolution version.
Illustrator:

Copyright:

Plants perennial, cespitose or solitary, to 70 cm; rhizomes slender, scaly, to 2 mm thick. Culms erect, slender, leafybased, trigonous, several-ribbed. Leaves spreading to erect, overtopped by culm; blades narrowly linear, proximally flattened, 0.5–3 mm wide, apex tapering, trigonous. Inflorescences terminal, solitary, headlike, dense, white, leafyinvolucrate; involucral-bracts several, flaring to recurved, white from broadened base nearly to median, then green to tapered tip, longer bracts 13 cm × 2–7 mm. Spikelets white, ovoid, 5–7 mm, apex acute; fertile scales many, boatshaped, sharply curvedkeeled, 3–4 (–5) mm, apex acute or blunt. Flowers: perianth absent. Fruits several per spikelet, 1.5–1.7 (–2) mm; body yellow to mahogany, broadly pyriformobovoid, tumidly lenticular, 1 × 0.5–0.7 mm, widest at apex, margins thickened, interrupted at base of tubercle; surfaces transversely undulaterugose, ridges contiguous, of shortlinear papillae; tubercle broadly triangular, 0.5–0.6 mm, graycrustaceous, apex short acuminate. 2n = 12.


Phenology: Fruiting late spring–summer.
Habitat: Sands, peats, and silt of interdunal swales, shores, meadowy swales, and marsh edges, sometimes fens, usually on circumneutral or basic substrates
Elevation: 0–300 m

Distribution

V23 371-distribution-map.jpg

Ala., Ark., Fla., Ga., La., Miss., N.C., S.C., Tex., Va., Mexico, West Indies, Central America, South America (French Guiana)

Discussion

Rhynchospora colorata is a slender and clonal version of R. latifolia, with a distinct preference for more basic substrates; involucral bracts are very slender and have a longer portion of green, usually reaching well proximal to midbract.

See also 16. Rhynchospora latifolia.

Selected References

None.

Lower Taxa

None.

No values specified."wider" is not a number.

... more about "Rhynchospora colorata"
Robert Kral +
(Linnaeus) H. Pfeiffer +
shortened +
2-lobed +  and lunate +
broadened +
Schoenus coloratus +  and Scirpus cephalotes +
scabridulous +  and scabrid +
flattened +
0.5mm;3mm +
yellow +  and mahogany +
1 cm10 mm <br />0.01 m <br /> (?) +
warty +, papillate +, alveolate +  and pitted +
lenticular +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
13 cm130 mm <br />0.13 m <br /> (?) +
ascending +  and appressed +
tapered +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
parallel +  and divergent +
terete +, rolled +  and plicate +
trigonous +
slender +
Ala. +, Ark. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +, S.C. +, Tex. +, Va. +, Mexico +, West Indies +, Central America +  and South America (French Guiana) +
0–300 m +
distalmost +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
biconvex +  and trigonous +
Sands, peats, and silt of interdunal swales, shores, meadowy swales, and marsh edges, sometimes fens, usually on circumneutral or basic substrates +
racemose +, corymbose +  and paniculate +
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 late spring–summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
Repert. Spec. Nov. Regni Veg. +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
adventitious +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
basal +  and proximal +
boat-shaped +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
cylindric +
Illustrated +
1 +, 3 +  and 100 +
0.5 cm5 mm <br />0.005 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 cephalotes +, Dichromena colorata +, Dichromena leucocephala +  and Rhynchospora drummondiana +
Rhynchospora colorata +
Rhynchospora +
species +
tapered +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
sulcate +  and 2-edged +
triangular +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
plant +, solitary +  and cespitose +