Cyperus cuspidatus |
Cyperus spectabilis |
|
---|---|---|
coastal plain flatsedge |
showy sedge, spectacular flatsedge |
|
Habit | Herbs, annual, cespitose. | Herbs, perennial, rhizomatous. |
Culms | 1–6(–25), trigonous to roundly trigonous, (0.5–)2–5(–9) cm × 0.2–0.4–(0.6) mm, glabrous. |
trigonous, (12–)30–80(–90) cm × 0.7–1.7 mm, glabrous or nearly so. |
Leaves | 1–6, V-shaped, 1–6 cm × 0.3–1 mm. |
flat to V-shaped, 20–45 cm × 2–4 mm, margins and keel minutely scabridulous. |
Inflorescences | heads digitate, loosely ovoid, 3–18 × 3–26 mm; rays (0–)1–6(–8), 2.5–20(–30) mm; bracts 2–3(–5), horizontal to ascending at 45(–60)°, V-shaped, 2–60 × 0.3–1.2 mm. |
spike 1, loosely ovoid to ovoid-ellipsoid, (1.5–)2.5–7 × (1–)1.5–3.5 cm; rays 1–4, 1–15 cm; rachis 1–2 cm; bracts 2–4, oblique or ascending, 1–15(–24) cm × 0.4–3.5 mm, keel, margins scabrid; rachilla ± deciduous, wingless. |
Spikelets | (3–)10–20(–30), greenish to reddish brown, narrowly ellipsoid to oblong, 3–11 × (0.8–)1.2–1.5 mm; floral scales (3–)6–20(–28), laterally greenish to reddish brown, glossy, medially greenish to light reddish brown, strongly recurved, laterally ribless, medially strongly 3-ribbed, oblong-ovate, (0.8–)1–1.3 × 0.8–1(–1.2) mm, apex emarginate, cusp 0.6–1.2 mm. |
(3–)8–40, linear, compressed-quadrangular, 8–18 × (2.4–)2.8–4 mm; floral scales deciduous, (2–)4–12, laterally light brown to reddish brown, medially green or light brown, laterally 2–3-ribbed, oblong-ovate, 1.6–2.6 × (1.5–)1.6–2.2(–2.4) mm, apex obtuse, sometimes mucronulate, medially glabrous. |
Flowers | stamens 2 or 3; anthers oblong-ovoid, 0.1(–0.2) mm; styles (0.2–)0.4–0.6 mm; stigmas 0.3–0.5 mm. |
anthers 0.4–0.6 mm; styles 0.3–0.6 mm; stigmas 0.6–1 mm. |
Achenes | brown, oblong-obovoid, (0.5–)0.6 × (0.3–)0.4 mm, base cuneate, apex blunt, surfaces coarsely papillose. |
brownish, stipitate, ellipsoid, 1.6–2 × (0.7–)0.9–1 mm, stipe whitish, 0.1–0.2 mm, apex obtuse, slightly apiculate, surfaces papillose. |
Cyperus cuspidatus |
Cyperus spectabilis |
|
Phenology | Fruiting summer. | Fruiting summer. |
Habitat | Damp, disturbed soils | Arroyos, riverbanks, clearings in montane forests |
Elevation | 0–300 m (0–1000 ft) | 100–1300 m (300–4300 ft) |
Distribution |
AL; FL; GA; SC; Mexico; Central America; South America
|
AZ; TX; Mexico |
Source | FNA vol. 23, p. 158. | FNA vol. 23, p. 178. |
Parent taxa | Cyperaceae > Cyperus > subg. Pycnostachys | Cyperaceae > Cyperus > subg. Cyperus |
Sibling taxa | ||
Synonyms | C. buckleyi, C. parryi, C. scaberrimus, C. spectabilis var. filiformis, C. spectabilis var. parryi, C. spectabilis var. scaberrimus | |
Name authority | Kunth: in A. von Humboldt et al., Nov. Gen. Sp. 1: 204. (1816) | Sprengel: Novi Provent., 15. (1818) |
Web links |