Rhynchospora fernaldii |
Rhynchospora baldwinii |
|
---|---|---|
Fernald's beaksedge |
Baldwin's beaksedge |
|
Habit | Plants perennial, cespitose, 15–50 cm; rhizomes absent. | Plants perennial, cespitose, 40–100 cm; rhizomes absent. |
Culms | erect or ascending, slender, leafy proximal to middle, somewhat stiff. |
stiffly erect to ascending, linear, leafy toward base, sharply trigonous, angles scabrid. |
Leaves | overtopped by culm; blades ascending, ± filiform, proximally flat or slightly concave, to 1 mm wide, apex narrowing, trigonous, abruptly blunt. |
shorter than culm; basal leaves forming strong rosette, shortlinear, flat, 3–5 mm wide, distal more widely spaced, narrower, apex shortacuminate, trigonous. |
Inflorescences | spikelet clusters 1–2, if 2 then close together, dense, broadly turbinate to hemispheric or even globose; primary leafy bract setaceous, exceeding clusters. |
spikelet clusters 1(–2), if 2 then closely set; terminal cluster mostly dense, hemispheric; proximalmost leafy bract subulate, much exceeding 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. |
dark redbrown, ovoid, (4–)5–6 mm, apex acute; fertile scales ovate, mostly 4–4.5 mm, apex excurvedcuspidate. |
Flowers | bristles 6, some reaching to apex of fruit body. |
bristles 12, reaching to or slightly beyond tubercle tip, 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. |
1–2 per spikelet, 3–3.5(–3.7) mm; body dark brown with paler center, dull, broadly ellipsoid-lenticular, 2–2.5 × 1.8–2 mm, smooth, margins flowing to tubercle; tubercle flat, concavely triangular, 0.7–1(–1.2) mm. |
Rhynchospora fernaldii |
Rhynchospora baldwinii |
|
Phenology | Fruiting summer–fall. | Fruiting spring–fall. |
Habitat | Sands and peats of low clearings in flatwoods, savannas, and bog edges | Sandy peats in low savannas, pine flatwoods, seeps, and bogs |
Elevation | 0–100 m (0–300 ft) | 0–100 m (0–300 ft) |
Distribution |
AL; FL; GA; MS |
AL; FL; GA; LA; MS; NC; SC |
Source | FNA vol. 23, p. 235. | FNA vol. 23, p. 237. |
Parent taxa | Cyperaceae > Rhynchospora | Cyperaceae > Rhynchospora |
Sibling taxa | ||
Synonyms | R. fascicularis var. fernaldii | Phaeocephalum baldwinii |
Name authority | Gale: Rhodora 46: 182, plate 825, figs. 3A, B. (1944) | A. Gray: Ann. Lyceum Nat. Hist. New York 3: 210. (1835) |
Web links |