Macropsychanthus (Queiroz & Snak, 2020)

Fonseca-Cortés, Andrés, 2021, Macropsychanthus magnus (Leguminosae: Papilionoideae: Diocleae), a new species from Costa Rica and Nicaragua, Phytotaxa 500 (4), pp. 266-274 : 273

Key to the species of Macropsychanthus present in Costa Rica and Nicaragua

1. Leaflets with 7–8 pairs of secondary nerves, flowers of 1.4–1.6 cm long.........................................................................................2

- Leaflets with 9–15 pairs of secondary nerves, flowers of 1.8–2.4 cm long.......................................................................................3

2. Estipels of 0,6–0,9 cm long, erect bracts with fuscous indumentum, pedicel joined in the dorsal suture of the fruit ......................... .................................................................................................................................................................. Macropsychanthus wilsonii

- Estipels of 0,9–1,5 cm long reflexed bracts with fulvous indumentum, pedicel joined in the middle of the fruit .............................. ................................................................................................................................................................. Macropsychanthus comosus

3. Terminal leaflets obovate, lateral leaflets ovate with strongly assimetrical bases, 8–10 pairs of secondary nerves, reflexed bracts, fruits with constrictions between the seeds ........................................................................................... Macropsychanthus violaceus

- Terminal leaflets ovate, lateral leaflets ovate with slighly assimetrical bases, 12–15 pairs of secondary nerves, erect bracts, fruits oblong....................................................................................................................................................... Macropsychanthus magnus