808
CYPERACEÆ.
[Carex.
Culms reddish, densely tufted, 1–2 ft. Leaves strict, semiterete. Spikelets 4–6, ½–1½ in. long. Glumes pale. Utricles elliptic, plano-convex; margins serrate | 28. C. Buchanani. |
Culms very short, 1–4 in. Spikelets 4–5, ⅕–⅓ in. long, approximate, almost concealed by the leaves. Utricles narrow elliptic-ovoid, piano convex, narrowed into a long acutely bidentate beak | 28. C. cirrhosa. |
Culms very short, 1–4 in. Spikelets 4–5, ⅕–¼ in. long, closely approximate. Utricles elliptic-ovoid, turgid, unequally biconvex; beak very short | 30. C. rubicunda. |
* Styles 3. Nut trigonous. (Styles often 2 in C. Berggreni.) | |
† Utricles glabrous (or the margins serrate above), hardly spreading when ripe. | |
a. Small species. Culms 1–5 in. high, overtopped by the leaves. Spikelets 3–4, closely approximate, often concealed by the leaves. | |
Reddish. Culms very short, ½–1½ in. Leaves 1–2 in. × 115–112 in., linear, flat, obtuse. Utricles elliptic, biconvex or obscurely trigonous; margins smooth; beak short. Styles often 2 | 31. C. Berggreni. |
Green. Culms 1–3 in. Leaves 120 in. broad, acute. Utricles narrow-ovoid, trigonous; margins serrate; beak rather long | 32. C. Hectori. |
Glaucous-green. Culms 1–3 in. Leaves 2–6 in. × 130–115 in. Utricles broadly ovoid, plano-convex; margins serrate; beak short | 33. C. decurtata. |
Brownish-red or green. Culms 1–5 in. Leaves much longer, 3–10 in. × 130–115 in.; tips often curled and twisted. Utricles elliptic-oblong, trigonous; margins smooth; beak very short | 34. C. uncifolia. |
b. Slender; culms 6–16 in. high. Leaves narrow, 130–112 in. broad, plano-convex or nearly so. Male spikelets solitary. | |
Culms 4–10 in. Leaves usually shorter, narrow. Spikelets 3–5, distant. Utricles narrow-ovoid, trigonous; margins smooth; beak short | 35. C. Dallii. |
Culms 5–15 in. Leaves with broad sheathing bases, tips curled and twisted. Glumes pale. Utricles narrow-ovoid, unequally biconvex; margins smooth; beak short | 36. C. Petriei. |
Culms 6–18 in., filiform. Leaves shorter or longer than the culms. Utricles elliptic-lanceolate, plano-convex; margins sharply serrate; beak long | 37. C. comans. |
Culms 4–9 in. Leaves much longer, 12–20 in. Spikelets 5–6, closely approximate, pale. Utricles elliptic-ovoid, unequally biconvex; margins smooth; beak rather long | 38. C. plesiostachys. |
Culms 9–24 in. Spikelets 3–5, short, bread. Utricles broadly ovoid, turgid, biconvex; margins smooth; beak short | 39. C. litorosa. |
c. Tall, stout or slender; culms 1–3 ft. high or more. Leaves flat or keeled, ⅛–½ in. broad. Male spikelets usually more than one (except in C. dissita). | |
Culms stout or slender, 1–2½ ft. Leaves ¼–⅓ in. broad. Spikelets 4–8, distant, on short peduncles, the lower rarely compound. Male spikelet solitary | 40. C. dissita. |