Cyperus grayoides
Brittonia 11: 255, fig. 1. 1959.
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
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
"shortened" is not a number.