直穗苔草

SPECIES

1. KingdomPlantae
2. PhylumTracheophyta
3. ClassLiliopsida
4. OrderPoales
5. FamilyCyperaceae

Native toAlaska, Alberta, Altay, Amur, Arizona, Baltic States, British Columbia, California, Central European Russia, China North-Central, Colorado, East European Russia

Observations recorded8,009

Culms hollow, ± spongy near base, trigonous in cross section, 35–125 cm; vegetative culms hollow, flattened when pressed, taller than fertile culms. Leaves: basal sheaths reddish purple, inner bands fibrillose with age; sheaths with apex of inner band pale brown to dull reddish purple, pubescent or scabrous, at least apically, rarely glabrous; ligules (6–)11–45 mm; blades 3–10 mm wide, usually sparsely to moderately long-pubescent, finely papillose abaxially, glabrous adaxially. Inflorescences 12–60 cm; spikes erect or ascending; proximal 2–5 spikes pistillate; terminal (1–)2–6 spikes staminate. Pistillate scales lanceolate to narrowly ovate, apex acute, conspicuously scabrous-awned, glabrous or scabrous near midrib. Staminate scales lanceolate to narrowly ovate, apex obtuse to acuminate, scabrous-awned, glabrous or, rarely, sparsely pubescent. Perigynia 12–21-veined, (6.5–)7–12 × 1.8–3.8 mm, glabrous; beak 2.1–4 mm, glabrous (rarely few spreading hairs on main veins), teeth spreading to outcurved, (1.2–)1.5–3 mm.