Mappia, Jacquin, 1797

Angulo, Diego F., Stefano, Rodrigo Duno De & Stull, Gregory W., 2013, Systematics of Mappia (Icacinaceae), an endemic genus of tropical America, Phytotaxa 116 (1), pp. 1-18 : 8-9

Key to the species of Mappia

1. Blades narrowly obovate, rarely elliptic, 5.0– 10.5 cm long; apex obtuse to acute, sometimes prolonged in a short tip; 6–7 pairs of secondary nerves; petals glabrous; ovary glabrous ............................................................... M. mexicana

- Blades narrowly elliptic, elliptic, narrowly oblong, obovate to oblanceolate, (5.0)10.0– 29.5 cm long; apex narrowly acuminate to acute or rounded; 7–13 pairs of secondary nerves; flowers bearded inside; ovary pubescent ............... 2 2. Inflorescence up to 12.5 cm long, peduncle up to 9.5 cm long; petals lightly bearded inside ................... M. longipes

- Inflorescence 2.0– 8.5 cm long, peduncle up to 4 cm long; petals heavily bearded inside .......................................... 3

3. Blades 7.0– 29.5 cm long; venation conspicuous abaxially, turning dark green when dry ........................ M. multiflora

- Blades 4.5–18.0 cm long; venation inconspicuous abaxially, turning brown when dry ........................... M. racemosa