Mansoa DC., Biblioth. Universelle Geneve, Ser. 2, 17: 128. 1838.

Lianas, usually without dimorphic juvenile growth, with garlic odour. Stems with phloem wedges in multiples of 4 in C.S., with solid pith; branchlets cylindrical with older stems becoming angled and ribbed, glabrous to pubescent, with or without sparsely distributed lenticels, with discontinuous interpetiolar ridge, with epidermis not peeling; prophylls of axillary buds triangular and minute or bromeliad-like, nonglandular. Leaves with garlic odour, 2- or 3-foliate, terminal leaflet often replaced by a trifid tendril, tendrils without adhesive discs, with apices not uncinate; leaflets chartaceous, with glands grouped in axils of veins, petiolules not articulated; petiole cylindric. Inflorescence axillary, a thyrse. Flowers bisexual, zygomorphic, pentamerous, hypogynous. Calyx cupulate, shortly 5-lobed or 5-apiculate, coriaceous or membranous, puberulous externally, without or with few glands near margins. Corolla magenta or pink, violet pink, lavender or mauve, without nectar guides, funnelform; tube straight, membranous, puberulous externally; lobes 5, imbricate. Stamens 4, with well-developed filaments, included, anthers glabrous, thecae straight. Carpels 2, syncarpous; ovary sessile, smooth and glabrous, ovules in 2 series on each placenta, stigma 2-lobed, lobes flattened, rhombic, glabrous. Disc annular. Capsules linear, flattened or inflated, straight, woody, with 2 valves, glabrous or villose, without lenticels, smooth except with midrib frequently developed into a prominent ridge, with calyx caducous. Seeds winged, with body smooth and glabrous, wings opaque or hyaline, linear.

18 species

Mansoa alliacea (Lam.) A. H. Gentry, Ann. Missouri Bot. Garden 66: 782. 1980; Bignonia alliacea Lam., Encycl. 1(2): 521. 1785; Adenocalymma alliaceum (Lam.) Miers, Ann. Mag. Nat. Hist., ser. 3, 7: 394 (1861); Pseudocalymma alliaceum (Lam.) Sandwith, Rec. Trav. Bot. Neerl. 34: 210. 1937.

Woody vine, climber by tendrils attaining long heights. Mature stem quadrangular, with angles ribbed; young stem cylindrical or subcylindrical, lenticellate; nodes slightly compressed with a glandular interpetiolar zone; pseudostipules (prophylls) ovate, ca. 5 mm long, glands absent. Leaves opposite, 2-foliate, sometimes with a terminal tendril, trifid (without adhesive discs), 17-25 cm long, with garlic odour, deciduous; leaflets 9-15 cm x 4.5-7 cm, elliptical or broadly elliptical, chartaceous, apex obtuse or obtusely acuminate, base acute, rounded or obtuse, sometimes unequal, margin undulate; upper surface dull, glabrous, with venation slightly prominent, lower surface light green, dull, with venation slightly prominent, abaxial surface with minute punctiform glands; petioles and petiolules both 7-30 mm long, puberulent or glabrous,. Inflorescence axillary or terminal panicle of cymes arranged in racemose manner, flowers few in inflorescence. Flowers 6-9 cm long, 4-5 cm across, bisexual, zygomorphic, pentamerous, hypogynous; pedicels 7-15 mm long. Calyx green, campanulate or cupulate, 5-8 mm long, truncate, slightly crenate and ciliolate at apex, apical rim purple. Corolla violet pink, lavender or mauve, slightly zygomorphic, funnelform, 6-9 cm long; tube straight, narrow cylindrical at base, 4 mm wide, flaring upwards with 2 cm diameter below limb; limb 4-5 cm in diameter, slightly 2-lipped, upper lip of 2 lobes and lower lip of 3 lobes, lobes nearly equal, 1.3-1.6 cm x 1.3-1.6 cm, suborbicular to obovate, apex round or emarginate, lobes puberulous externally; throat and tube inside white, without nectar guides. Stamens 4, included, inserted at base of corolla tube, didynamous, 2 large with filaments ca. 2.2 cm long and 2 short with filaments 1.8 cm long, dilated and hairy at the base; staminode 1. Disc cushion-like. Carpels 2, syncarpous; ovary sessile, ca. 4.5 mm long, cylindrical with 2 longitudinal ridges, lepidote, 2-locular, ovules in 2 series on placenta in each loculus, placentation axile; style ca. 2.3 cm long; stigma 2-fid, lobes flattened and rhombic. Capsule linear, flat, woody, light brown, 28-35 cm x 1.5-3 cm, flat, 2-valved, each valve with a longitudinal rib on middle portion, mucronate at apex.

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