Rhynchospora pineticola |
Rhynchospora kunthii |
|
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pine barren beaksedge |
Kunth's beaksedge |
|
Habit | Plants perennial, mostly densely cespitose, 20–70 cm, base deep rich redbrown; rhizomes absent. | Plants solitary or in small tufts, (5–)10–70 cm, clonal; rhizomes strongly present, stoloniferous. |
Culms | erect to ascending, leafy, stiff. |
leafiest toward base, ± trigonous, slender. |
Leaves | shorter than scape; blades narrowly linear, (1–)2–3 mm wide, margins involute, apex trigonous, tapering. |
basal leaves spreadingascending, distal more erect, mostly exceeded by culms (except in highaltitude forms); blades proximally flat or strongly folded, 1.5–4 mm wide, apex trigonous, subulate. |
Inflorescences | clusters 1–2, if 2 then close together, dense, broadly turbinate to hemispheric or lobedglobose; primary leafy bract linear, stiff, exceeding clusters. |
spikelet clusters (2–)3–5, compact, proximalmost widely spaced, turbinate to ovoid; peduncles ascending; branches ascending to spreading; leaf bracts exceeding proximalmost clusters, exceeded by distal cluster. |
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. |
deep redbrown to nearly black, ovoid, 3–4 mm, apex acute; fertile scales ovate, 2.5–3 mm, apex acute, midrib included or shortexcurrent. |
Flowers | perianth bristles 6, reaching at least to tubercle base, plumose from base to more than 1/2 length of fruit body. |
perianth bristles 6, some short, some extending to or nearly to tubercle base, antrorsely barbellate. |
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. |
2–3 per spikelet, 2–2.1 mm; body pale yellowbrown, lenticular, broadly ellipsoidobovoid, 1.3–1.6 × 1–1.2 mm; surfaces transversely irregularly rugulose, intervals with rows of vertical, narrowly rectangular alveolae; tubercle evenly or concavely triangular, 0.5–0.6(–0.7) mm. |
Rhynchospora pineticola |
Rhynchospora kunthii |
|
Phenology | Fruiting spring–fall or all year. | Fruiting late spring–summer. |
Habitat | Sands and sandy peat of bog margins, pinelands and pine saw palmetto flats among wiregrass | Marsh meadows, seeps, boggy sites |
Elevation | 0–200 m (0–700 ft) | 1000–3500 m (3300–11500 ft) |
Distribution |
FL; West Indies (Cuba)
|
CA; Mexico; South America (Colombia) |
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.) |
|
Source | FNA vol. 23, p. 219. | FNA vol. 23, p. 225. |
Parent taxa | Cyperaceae > Rhynchospora | Cyperaceae > Rhynchospora |
Sibling taxa | ||
Synonyms | Phaeocephalum intermedium, R. intermedia, R. plumosa var. intermedia | R. schaffneri |
Name authority | C. B. Clarke: Bull. Misc. Inform. Kew, addit. ser. 8: 40. (1908) | Nees ex Kunth: Enum. Pl. 2: 296. (1837) |
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