Uapaca Baill.
  • Étude Euphorb. 595. 1858.


Cite taxon page as 'WFO (2021): Uapaca Baill. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000039691. Accessed on: 27 Oct 2021'

Morphology

Leaves alternate, usually crowded towards the ends of the branches, petiolate or subsessile, stipulate or not, simple, entire, penninerved

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    Dioecious pachycaul vernicifluous trees or shrubs with a simple and/or lepidote indumentum; trunks often with buttress-roots; twigs often strongly marked with leaf-scars

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    Male flowers sessile; calyx campanulate or turbinate, truncate, dentate, irregularly split or regularly 5–more-lobed, the lobes imbricate; petals 0; disc 0; stamens (4–)5(–6), free, episepalous, anthers erect, basifixed, introrse, thecae parallel, longitudinally dehiscent; pistillode cylindric-obconic, and often infundibuliform, hypocrateriform, or pileiform and sometimes lobate

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    Inflorescences axillary, solitary or fasciculate, pedunculate, with a whorl of 5–10 imbricate involucrate tepaloid bracts surrounding the flowers; ♂ inflorescences many-flowered, the flowers in dense globose capitula; ♀ inflorescences 1-flowered

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    Seeds mostly 1 per pyrene, compressed, ecarunculate; endosperm fleshy; cotyledons broad, flat.

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    Fruit drupaceous, indehiscent; mesocarp spongy; pyrenes (2–) 3(–4), dorsally bisulcate, indurate

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    Female flowers sessile; calyx minute, truncate or sinuate, disc-like; petals 0; disc 0; ovary (2–)3(–5)-locular, with 2 ovules per locule; styles (2–)3(–5), free, thick, recurved, enveloping the ovary, multipartite or laciniate

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    Fruit drupaceous, indehiscent; mesocarp spongy; pyrenes (2)3(4), dorsally carinate and bisulcate, indurate, tardily bivalved.

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    Indumentum simple and/or minutely pseudolepidote.

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    Dioecious trees or shrubs.

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    Seeds mostly 1 per pyrene, compressed, ecarunculate; endosperm fleshy; embryo straight; cotyledons broad, flat, green.

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    Male flowers sessile; calyx campanulate or turbinate, truncate, dentate or irregularly or regularly lobed, the lobes imbricate; petals absent; disk absent; stamens (4)5(6), free, episepalous, anthers erect, subbasifixed, introrse, thecae parallel, longitudinally dehiscent; pistillode cylindric-obconic, infundibuliform, hypocrateriform, pileiform or sometimes lobed.

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    Female flowers sessile; calyx minute, truncate, sinuate or lobed, disciform; petals absent; disk absent; ovary (2)3(5)-locular, with 2 ovules per loculus; styles (2)3(5), free, thick, recurved, covering the ovary, multipartite to laciniate.

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    Trunks occasionally stilt-rooted.

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    Twigs stout, often with pronounced leaf scars, producing an exudate when cut, which hardens and darkens on drying.

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    Leaves alternate, usually crowded towards the end of the twigs, petiolate or subsessile, stipulate or not; blades simple, often obovate, entire, penninerved.

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    Inflorescences axillary, or borne on older wood, solitary or fasciculate, pedunculate, with a whorl of 5–12 involucrate imbricate tepaloid bracts surrounding the flowers; male inflorescences many-flowered, the flowers in dense globose capitula; female inflorescences 1-flowered.

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