Vanilla grandifolia Lindl., J. Proc. Linn. Soc., Bot. 6: 138 (1862).
This species is characterized by its large, broadly elliptic to suborbicular leaves, abruptely apiculate of rather thin substance. Floral morphology suggests a close relationship with Vanilla imperialis, with a very large rostellum and a trumpet-shaped, concave lip, which is apiculate at apex (after drawings sent by de Wildeman to Kew). Porteres´ fig. 85 (1954) shows a straight, undulate, entire lip lacking the characteristic apicule at apex.
Príncipe to Zaïre