WorldFloraDB - Bolboschoenus

Characteristics

Herbs, perennial, cespitose or not, rhizomatous. Culms solitary or not, cormose at base [except eastern Asian Bolboschoenus planiculmis (F. Schmidt) T. V. Egerova], sharply trigonous. Leaves basal and cauline; sheaths tubular; ligules absent; blades flat or V-shaped in cross section, prominently keeled on abaxial surface, distally trigonous. Inflorescences terminal, subumbellate, subcorymbose, or capitate; spikelets to 80, mostly 4–10 mm diam.; involucral bracts surpassing inflorescence 1–5, spreading or proximal erect, leaflike. Spikelets: scales 25 or more, spirally arranged, each subtending flower, abaxially puberulent, often glabrescent, tip notched and awned. Flowers bisexual; perianth of 3–6 bristles, straight or curved, shorter to slightly longer than achene, retrorsely spinulose; stamens 3; styles linear, 2–3-fid, base persistent. Achenes biconvex to trigonous, 2.3–5.5 mm, smooth.

More

Herbs, perennial. Rhizomes often forming hard ovoid tubers. Culms many nodose, base bulbously thickened. Leaves basal and cauline; sheath tubular; ligule absent; leaf blades linear, flat. Involucral bracts leaflike, surpassing inflorescence, spreading. Inflorescence a terminal anthela or capitate with 1 to many spikelets. Spikelets with many spirally arranged deciduous glumes, each subtending a bisexual flower. Perianth bristles 3-6, shorter to longer than nutlet, deciduous with nutlet. Stamens 3. Style base not distinct, slightly thickened or not, persistent. Nutlet biconvex to 3-sided, smooth, apex beaked.

Life form	perennial
Growth form	herb
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Foliage retention	deciduous
Sexuality	hermaphrodite
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Root system	rhizome
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Cultivation

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