Cyperus grayoides

Mohlenbrock

Brittonia 11: 255, fig. 1. 1959.

Common names: Mohlenbrock’s sedge
Treatment appears in FNA Volume 23.

Herbs, perennial, cespitose, rhizomatous, tuberlike. Culms trigonous, 5–35 cm × 0.7–1.2 mm, glabrous. Leaves V-shaped, 5–25 cm × 1.5–3.5 mm, slightly scabridulous on abaxial margins, midrib. Inflorescences: spikes loosely ± globose, 15–25 mm wide; rays 1–10 cm; rachis 1–4 mm; bracts 3–7, ascending, V-shaped, 3–20 cm × 1–3 mm; rachilla deciduous, wingless. Spikelets 3–24, compressed, oblong-lanceoloid, 4–12 × 2.5–3.2 mm; floral scales deciduous, 3–9, pale reddish brown, ovate, laterally 3–5-ribbed, 2.5–3 × 2–2.4 mm, apex acute to obtuse. Flowers: anthers 1–1.2 mm; styles 0.4–0.6 mm; stigmas 1–2 mm. Achenes dark brown, ± stipitate, ellipsoid, 2–2.4 × 0.9–1.2 mm, apex obtuse, apiculate, surfaces glabrous, puncticulate, or papillose. 2n = 166.


Phenology: Fruiting summer.
Habitat: Sand prairies, waste places, fallow fields
Elevation: 100–300 m

Distribution

V23 303-distribution-map.jpg

Ark., Ill., La., Mo., Tex.

Discussion

Of conservation concern.

Cyperus grayoides is in the Center for Plant Conservation’s National Collection of Endangered Plant’s. See frontispiece.

Selected References

None.

Lower Taxa

None.
... more about "Cyperus grayoides"
Gordon C. Tucker* +, Brian G. Marcks* +  and J. Richard Carter * +
Mohlenbrock +
Mohlenbrock’s sedge +
Ark. +, Ill. +, La. +, Mo. +  and Tex. +
100–300 m +
Sand prairies, waste places, fallow fields +
Fruiting summer. +
Undefined subg. Chlorocyperus +, Cyperus subg. Mariscus +  and Undefined subg. Papyrus +
Cyperus grayoides +
Cyperus subg. Cyperus +
species +