Rhynchospora fernaldii |
Rhynchospora odorata |
|
---|---|---|
Fernald's beaksedge |
fragrant beaksedge |
|
Habit | Plants perennial, cespitose, 15–50 cm; rhizomes absent. | Plants perennial, cespitose, 100–180 cm; rhizomes often present, short, scaly. |
Culms | erect or ascending, slender, leafy proximal to middle, somewhat stiff. |
erect to ascending, leafy, slender, angular. |
Leaves | overtopped by culm; blades ascending, ± filiform, proximally flat or slightly concave, to 1 mm wide, apex narrowing, trigonous, abruptly blunt. |
exceeded by culm; blades linear, proximally flat, 3–6 mm wide, apex tapering, trigonous, subulate. |
Inflorescences | spikelet clusters 1–2, if 2 then close together, dense, broadly turbinate to hemispheric or even globose; primary leafy bract setaceous, exceeding clusters. |
of terminal and axillary clusters, 3–5, proximalmost widely spaced, turbinate or lobed, fascicles dense, branches ascending; leafy bracts exceeding all but proximalmost clusters. |
Spikelets | redbrown, ovoid, 2–2.5(–4) mm, apex acute; fertile scales broadly ovate, 1.5–1.9(–2) mm, apex acute to acuminate, midrib excurrent as awn to 0.5 mm. |
rich redbrown, ovoid, (4–)5–6(–7) mm, apex acuminate; fertile scales ovate, (3.5–)4–5 mm, apex acuminate, midrib short or longexcurrent. |
Flowers | bristles 6, some reaching to apex of fruit body. |
perianth bristles 6, reaching past tubercle, antrorsely barbellate. |
Fruits | 2–3 per spikelet, 1–1.2(–1.4) mm; body dull dark brown with paler brown center, lenticular, broadly obovoid to broadly ellipsoid, 1 × 0.8 mm, margins narrow, flowing to tubercle; tubercle nearly equilaterally triangular, 0.2–0.3 mm. |
mostly 3–4(–7) per spikelet, 3 mm with pedicellar joint and tubercle; body pale yellowbrown, obovoidlenticular, 1.4–1.7 × 1.4 × 1.5; surfaces transversely finely wavyrugulose, intervals vertically rectangularalveolate; pedicellar joint 0.3–0.6 mm; tubercle compressed, triangularacuminate, 0.5–0.6 (–1) mm, margin setulose. |
Rhynchospora fernaldii |
Rhynchospora odorata |
|
Phenology | Fruiting summer–fall. | Fruiting summer–fall or all year (south). |
Habitat | Sands and peats of low clearings in flatwoods, savannas, and bog edges | Sands and peats of swamps, marshes, interdunal swales, low meadows, savannas |
Elevation | 0–100 m (0–300 ft) | 0–200 m (0–700 ft) |
Distribution |
AL; FL; GA; MS |
AL; FL; GA; NC; SC; West Indies (Bahamas, Cuba, Dominican Republic, Jamaica)
|
Source | FNA vol. 23, p. 235. | FNA vol. 23, p. 223. |
Parent taxa | Cyperaceae > Rhynchospora | Cyperaceae > Rhynchospora |
Sibling taxa | ||
Synonyms | R. fascicularis var. fernaldii | Phaeocephalum stipitatum, R. stipitata |
Name authority | Gale: Rhodora 46: 182, plate 825, figs. 3A, B. (1944) | C. Wright ex Grisebach: Cat. Pl. Cub., 242. (1866) |
Web links |