Cyperus distinctus

Steudel

Syn. Pl. Glumac. 2: 24. 1855.

Illustrated
Synonyms: Cyperus virens var. brittonii C. B. Clarke
Treatment appears in FNA Volume 23. Treatment on page 154. Mentioned on page 143, 153, 155.

Herbs, perennial, cespitose, rhizomatous. Culms terete, 40–60(–90)cm, glabrous. Leaves flat, 35–70 cm × 4–9(–12) mm. Inflorescences: heads hemispheric, 10–20 mm diam.; rays 5–9(–14), 3.5–10 cm; 2d order rays 0.5–2 cm; bracts 5–10, ± horizontal, flat, 12–40(–50) cm × 2–7 mm. Spikelets (25–)35–50(–60), ovoid, compressed, (3.5–)5–12(–14) × 2.5–3.5(–4) mm; floral scales 10–32, golden brown to brown, 2-keeled, laterally ribless, narrowly lanceolate, 2–2.2(–3) × 0.8–1.4 mm. Flowers: stamen 1; anthers 1 mm; styles 1 mm; stigmas 0.5 mm. Achenes brown, stipitate, narrowly ellipsoid, 1.5–2 × 0.2–0.4 mm, base swollen, spongy, stipe 0.2 × 0.2–0.3 mm, apex acute, beak slender, 0.2 mm, surfaces puncticulate.


Phenology: Fruiting summer.
Habitat: Damp grasslands, roadsides, ditches
Elevation: 0–50 m

Distribution

V23 239-distribution-map.jpg

Fla., Ga., La., S.C., West Indies (Bahamas).

Discussion

The slender achenes with conspicuously swollen bases distinguish Cyperus distinctus from other species of subg. Pycnostachys.

Selected References

None.

Lower Taxa

None.
... more about "Cyperus distinctus"
Gordon C. Tucker* +, Brian G. Marcks* +  and J. Richard Carter * +
Steudel +
Fla. +, Ga. +, La. +, S.C. +  and West Indies (Bahamas). +
0–50 m +
Damp grasslands, roadsides, ditches +
Fruiting summer. +
Syn. Pl. Glumac. +
Illustrated +
Cyperus virens var. brittonii +
Cyperus distinctus +
Cyperus subg. Pycnostachys +
species +