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The genera of Leguminosae-Caesalpinioideae & Swartzieae

L. Watson and M.J. Dallwitz

Eligmocarpus Capuron

Type species: E. cynometroides Capuron.

Habit and leaf form. Trees (7–15 m tall, often low branching); unarmed.

Phyllotaxy depicted in illustration as spiral. The leaves compound; pinnate; imparipinnate; with shallowly grooved, puberulous rachides. The leaflets 5–20 mm long, increasing in size towards the leaf apices, many per leaf to few per leaf (usually 5–9(-11)); opposite or sub-opposite; shortly petiolulate (about 0.5 mm); without noticeably twisted petiolules; thinly leathery, oblong to oblong-obovate or -elliptic, tapering to the cuneate base and apically truncate and notched, symmetrical or nearly so; with a predominant ‘midrib’; with a strong, continuous marginal nerve. Stipules absent or early caducous or very inconspicuous in mature leaves; obovate, 2–3 mm long, membranous; not connate. Stipels absent.

Inflorescence and floral morphology. The inflorescences axillary (on young shoots); branched; of cymose units; few flowered, cymose panicles. Bracts about 1.5 mm long, absent at anthesis. Bracteoles present; small, not enclosing the flower buds; absent at anthesis; not valvate.

The flowers about 2 cm in diameter; hermaphrodite; very irregular (zygomorphic); ambiguously ‘papilionaceous’ to not ‘papilionaceous’; pentamerous; coloured (yellow). Hypanthium absent, the androecium hypogynous. The perianth comprising distinct calyx and corolla. Calyx present; 5; covering the rest of the flower in bud; polysepalous; more or less regular (the abaxially keeled sepals subequal); members imbricate. Corolla present; very irregular (with the posterior, exterior petal largest, broader than long and rounded, the lateral pair smaller and obovate, and the lower pair much smaller); 5; without greatly reduced members (the smallest pair being 8–9 mm long); polypetalous. Petals all clawed; imbricate; imbricate-descending with the posterior petal (vexillum) outside; yellow. Disk present and conspicuous (narrowly circular, lobed between the stamens). The androecium comprising 10 members; declinate; with united members (the adaxial 5 forming a deciduous synandrium, with penicillate anthers; the abaxial 5 free, glabrous); members markedly unequal (the 5 free abaxial members shorter); comprising only fertile stamens. Fertile stamens 10. Anthers all attached at the base of the connective; dehiscing via pores or short slits (subapically, by short transverse slits). Ovary thick, sessile or subsessile; free. Stigma not dilated (the style curved, attenuate). Ovules few (3–6).

Fruit, seed and seedling. Fruit suborbicular, transversely crumpled-plicate and concertina-like, indehiscent; dry, not drupaceous; dry, becoming woody (with up to 4 seeds). The mature valves without prominent venation.

Species number and distribution. 1 species (E. cynometroides). 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.’.