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Cratoxylum Bl.

黄牛木属

Description from Flora of China

Hornschuchia Blume, Catalogus, 15. 1823, not Nees (1821).

Trees or shrubs, deciduous to evergreen. Twigs with nodes sometimes flattened, mostly with interpetiolar lines; apical bud abortive or not; buds with scales or not. Leaves opposite, sessile to petiolate, entire, abaxially often pruinose to waxy, often finely translucent-punctate between veins, secondary veins ± widely spaced, tertiary veins reticulate. Inflorescence cymose, terminal and/or axillary; bracteoles caducous, minute. Flowers bisexual, homostylous or heterostylous, pedicellate. Sepals 5, ± unequal, leathery, usually accrescent. Petals 5, white to deep crimson or pink, sometimes tinged orange and green, often with punctiform or linear dark resinous glands, sometimes with ± adnate adaxial near-basal scalelike appendage. Stamen fascicles apparently 3 (2 + 2 + 1), with filaments ca. 2/3 united; anthers subpersistent, dorsifixed, sometimes with ± prominent resinous connective gland. Fasciclodes 3, alternating with fascicles, scalelike, sometimes minute. Ovary 3-loculed, with [3-]5-16[-18] erect or ascending ovules on lower half of each placenta; styles 3, free, often divergent; stigmas punctiform, truncate or somewhat thickened, slightly papillose. Capsule ± woody, ellipsoid to narrowly cylindric, dehiscing loculicidally, with persistent columella. Seeds obovoid to cylindric, with unilateral wing 2.5-3 × as long [or wing all around and smaller]; embryo cylindric.

About six species: Cambodia, S and SW China, India, Indonesia, Laos, Malaysia, Myanmar, Philippines, Thailand, Vietnam, all S of ca. 24° N; two species in China.

(Authors: Li Xiwen (李锡文 Li Hsi-wen), Li Jie (李捷); Peter F. Stevens)


 

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