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The genera of Leguminosae-Caesalpinioideae & Swartzieae

L. Watson and M.J. Dallwitz

Mendoravia Capuron

Type species: M. dumaziana Capuron.

Habit and leaf form. Trees (10–25 m tall); without specialized ‘short shoots’; unarmed.

Phyllotaxy spiral. The leaves ovate to oblong-ovate, thinly leathery, ostensibly simple (the short petioles inarticulate); with a predominant midrib. Stipules absent or early caducous or very inconspicuous in mature leaves (caducous); triangular, membranous; not connate.

Inflorescence and floral morphology. The inflorescences few flowered, axillary; basally once or twice branched; of racemose units. The flowers not distichous. Bracts subulate, about 2 mm long, absent at anthesis (caducous).

The flowers 2–2.5 cm in diameter; hermaphrodite; actinomorphic to slightly irregular (sub-actinomorphic); not pentamerous throughout; departing from pentamery in the androecium, or in the calyx, in the corolla, and in the androecium; coloured. Hypanthium more or less absent, the androecium hypogynous (the receptacle flat). The perianth comprising distinct calyx and corolla. Calyx present; small, (5–)6; not covering the rest of the flower in bud; polysepalous; more or less regular (the sepals subequal); members imbricate to not imbricate (scarcely imbricate in the bud, and separating early). Corolla present; regular to slightly irregular (the petals subequal); (5–)6; without greatly reduced members; partially gamopetalous to polypetalous (sometimes having pairs of petals partially or completely fused). Petals much larger than the sepals, elliptic, narrowing basally, sessile; imbricate. Disk absent. The androecium comprising 11–12 members; not declinate; members all free of one another; members all more or less equal in length (subequal); comprising only fertile stamens. Fertile stamens 11–12 (isomorphic, the filaments only a little longer than the orange, narrowly oblong anthers). Anthers attached at the base of the connective; dehiscing apically via pores or short slits (via short, transverse slits). Ovary oblong to sigmoid, flat, sessile or subsessile; free. Stigma dilated (capitate on the short style, which scarcely exceeds the anthers). Ovules few (2(-3)).

Fruit, seed and seedling. Fruit a two-valved pod (with papery valves); compressed, obliquely oblong, straight; not internally septate; valves twisting and enrolling during dehiscence (these subcoriaceous); winged longitudinally; narrowly, ventrally 1 winged; not becoming woody. The mature valves with conspicuous, prominent, raised venation; conspicuous venation not predominantly longitudinal. Seeds non-endospermic; not arillate.

Wood anatomy. Wood with vestured pits - a peculiar feature in the context of Caesalpinioideae.

Species number and distribution. 1 species (M. dumaziana). Madagascar.

Tribe. Cassieae.


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Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 1993 onwards. The genera of Leguminosae-Caesalpinioideae and Swartzieae: descriptions, illustrations, identification, and information retrieval. In English and French. Version: 22nd March 2017. delta-intkey.com/caes’.

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