Cyperus hermaphroditus

(Jacquin) Standley

Contr. U.S. Natl. Herb. 18: 88. 1916.

Illustrated
Basionym: Carex hermaphrodita Jacquin Collectanea 4: 174. 1791
Synonyms: Mariscus hermaphroditus (Jacquin) C. B. Clarke Mariscus jacquinii Kunth
Treatment appears in FNA Volume 23. Treatment on page 186. Mentioned on page 148, 149, 185.

Herbs, perennial, rhizomatous. Culms trigonous, (10–)30–80(–140) cm × (0.4–)1–3(–5) mm, glabrous. Leaves V-shaped or flanged V-shaped, (5–)15–70(–90) cm × (2–)4–10(–13) mm, glabrous. Inflorescences: spikes 1(–5), rather densely ovoid or oblong-cylindric, (10–)25–45(–62) × 7–22 mm, 11–21 spikelets per 5 mm of rachis; rays (3–)5–10(–17), (1–)5–12(–24) cm; bracts (2–)4–8, ascending at 30–45°, V- or inversely W-shaped, (2–)8–40(–65) cm × (1–)2–8 mm; rachilla deciduous, wings 0.4–0.5 mm wide. Spikelets (10–)50–150, oblong to linear, quadrangular, (3–)4–8(–18) × (0.8–)1–1.2(–1.6) mm; distal spikelet spreading or ascending; floral scales (1–) 3–8, pale greenish white to golden brown, deep brown, or reddish brown, medially usually green, weakly to strongly 3(–4)-ribbed laterally, 1–3-ribbed medially, ovate to elliptic, (2–)2.6–3.2(–4) × 1.2–2 mm, apex obtuse. Flowers: anthers (0.4–)0.6–1 mm; styles 0.4–1.6 mm; stigmas 1–1.5 mm. Achenes brown or reddish brown, sessile or nearly so, ellipsoid, 1.4–1.8(–2) × 0.6–0.8(–1) mm, apex acute to obtuse, slightly apiculate, surfaces puncticulate.


Phenology: Fruiting summer–fall.
Habitat: Arroyos
Elevation: 500–1200 m

Distribution

V23 319-distribution-map.jpg

Ariz., Tex., Mexico, West Indies, South America.

Discussion

An erroneous report of Cyperus hermaphroditus from Alabama was based on misidentification of C. thyrsiflorus.

Selected References

None.

Lower Taxa

None.
... more about "Cyperus hermaphroditus"
Gordon C. Tucker* +, Brian G. Marcks* +  and J. Richard Carter * +
(Jacquin) Standley +
Carex hermaphrodita +
Ariz. +, Tex. +, Mexico +, West Indies +  and South America. +
500–1200 m +
Arroyos +
Fruiting summer–fall. +
Contr. U.S. Natl. Herb. +
Illustrated +
Mariscus hermaphroditus +  and Mariscus jacquinii +
Cyperus hermaphroditus +
Cyperus subg. Cyperus +
species +