Rhynchospora pineticola |
Rhynchospora eximia |
|
---|---|---|
pine barren beaksedge |
Florida beaksedge |
|
Habit | Plants perennial, mostly densely cespitose, 20–70 cm, base deep rich redbrown; rhizomes absent. | Plants perennial or annual, single or cespitose, (10–)20–50 cm; rhizomes absent. |
Culms | erect to ascending, leafy, stiff. |
spreading to erect, leafy, obtusely triangular. |
Leaves | shorter than scape; blades narrowly linear, (1–)2–3 mm wide, margins involute, apex trigonous, tapering. |
often exceeding inflorescences; blades narrowly linear, proximally flat, 1–3 mm wide, apex trigonous, tapering. |
Inflorescences | clusters 1–2, if 2 then close together, dense, broadly turbinate to hemispheric or lobedglobose; primary leafy bract linear, stiff, exceeding clusters. |
terminal and axillary, clusters of 1–5 corymbs; leafy bracts much exceeding corymbs. |
Spikelets | light to dark redbrown, lanceovoid, 3.5–6 mm, apex acuminate; fertile scales ovate, convex, 3–3.5(–4) mm, apex acuminate, low midrib excurrent or not. |
few to several, on ascending, stiff, short-to-elongate branches, red-brown to brown, lanceoloid, (5–)6–10 mm, apex acuminate; fertile scales many, ovate, shallowly convex, 5 mm, apex acuminate; midrib short-excurrent or not. |
Flowers | perianth bristles 6, reaching at least to tubercle base, plumose from base to more than 1/2 length of fruit body. |
perianth absent. |
Fruits | 1(–2) per spikelet, (2–)2.5–2.8(–3) mm; body redbrown or brown, tumidly obovoid, (1.5–)2–2.2 × 1–1.7 mm; surfaces interruptedly transversely rugulose; tubercle broadly conic, 0.5–0.8(–1) mm, base broadly 2lobed, apex often apiculate. |
1.5 mm; body dark brown to black, tumidly lenticular, nearly orbicular, 0.8–0.9 × 0.6–0.7 mm, margins grooved, discontinuous with tubercle; surfaces transversely wavyrugose, ridges of contiguous rows of vertical, linear, raised cells; tubercle broad, low triangular, 0.2–0.3 mm, crustaceous, base capping fruit summit, raised at ends, apex shortacuminate. |
Rhynchospora pineticola |
Rhynchospora eximia |
|
Phenology | Fruiting spring–fall or all year. | Fruiting all year. |
Habitat | Sands and sandy peat of bog margins, pinelands and pine saw palmetto flats among wiregrass | Moist to wet sandy peaty swales, pond shores, depressions in savannas, moist waste areas |
Elevation | 0–200 m (0–700 ft) | 0–100[–1000] m (0–300[–3300] ft) |
Distribution |
FL; West Indies (Cuba)
|
FL; Mexico; Central America; South America; West Indies; Africa |
Discussion | Rhynchospora pineticola is distinguished from taller extremes of R. plumosa by its thicker leaves and scapes and its longer spikelets and fruit. Its bases are a deep rich red-brown rather than the pale brown or dull deep brown of R. plumosa. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Rhynchospora eximia is often found at elevations from near sea level to over 1000 m in the tropics. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 23, p. 219. | FNA vol. 23, p. 216. |
Parent taxa | Cyperaceae > Rhynchospora | Cyperaceae > Rhynchospora |
Sibling taxa | ||
Synonyms | Phaeocephalum intermedium, R. intermedia, R. plumosa var. intermedia | Spermodon eximius, Psilocarya schiedeana, R. oxycephala, R. psilocaroides |
Name authority | C. B. Clarke: Bull. Misc. Inform. Kew, addit. ser. 8: 40. (1908) | (Nees) Boeckeler: Linnaea 37: 601. (1873) |
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