Amburana Schwacke & Taubert (1894: 387)

Seleme, Elidiene P., Lewis, Gwilym P., Stirton, Charles H., Sartori, Ângela L. B. & Mansano, Vidal F., 2015, A Taxonomic Review And A New Species Of The South American Woody Genus Amburana (Leguminosae, Papilionoideae), Phytotaxa 212 (4), pp. 249-263 : 251

Amburana Schwacke & Taubert (1894: 387) . Type:— Amburana cearensis (Allemão) A. C. Smith.

Trees 3–40 m tall, 20–150 cm in diameter; trunk with exfoliating and sweetly scented papery bark, and a dark exudate with a strong odor of coumarin when cut, young branches cylindrical, slightly striate, with white lenticels, glabrous. Leaves alternate, distichous, imparipinnate; petioles usually cylindrical and not grooved; pulvinules rarely grooved; stipules present only on seedlings, caducous; leaflets 7–25 per leaf, subopposite, ovate to elliptic, base rounded and apex rounded or acuminate, margin entire, venation camptodromus-brochidodromous, the midrib prominent on both surfaces, but more so abaxially. Inflorescences paniculate, axillary or terminal; stems slightly striate, bracteoles caducous; pedicel 2–5 mm long; calyx slightly 5-toothed, glabrous basally, green, 1–2 mm long, including a tubular hypanthium of 5–7 × 1 mm; corolla with a single adaxial petal (the standard), white or pale yellow, petal blade usually rounded, petal claw short, sericeous to pilose adaxially; androecium with 10 stamens, these partially adnate to the hypanthium, the 5 longer ones ascending, the 5 shorter ones not ascending; anthers yellow; ovary long-stipitate, stipe partially adnate to the hypanthium, the free portion ca. 3 mm long, densely pilose, 2-ovuled, style ca. 8 mm long, curved; stigma punctate. Fruit a cryptosamara with an apical seed chamber, oblong, wrinkled reticulate, dehiscing apically into two valves, endocarp developed into a papery wing surrounding the seed, or the endocarp not forming a winged envelope that surrounds the exposed seeds; seeds 1 (rarely 2), ovoid, black or red, smooth; the embryo exalbuminous, the cotyledons plano-convex, base cordate.