Passifloraceae

Feuillet, Christian, 2020, Ancistrothyrsus scopae (Passifloraceae), a new species from Amazonian Brazil and Guyana, with keys to the genus and species, Phytotaxa 438 (3), pp. 207-212 : 207

Key to the South American genera of Passifloraceae s. str.:

1. Androgynophore mostly distinct, 3 mm long or more ......................................................................................................................2.

- Androgynophore less than 2 mm long or lacking .............................................................................................................................3.

2. Flowers 4-merous, with 8 stamens; inflorescences usually a compound cyme, pedunculate; arils reduced, not obvious; young tendrils circinate .......................................................................................................................................................... Ancistrothyrsus

- Flowers 5-merous, with 5 stamens; inflorescences cymose, mostly sessile and simple or reduced; seeds included in a juicy aril; young tendrils in a cylindrical coil ...................................................................................................................................... Passiflora

3. Corona filaments in 2 rows, outer series white; androgynophore 1–2 mm long; styles connate to one quarter or halfway..... Dilkea

- Corona filaments in 3 rows, outmost series orange; gynophore short, androgynophore lacking; styles free .................. Mitostemma