Atractocarpus, IN, IN

Mouly, Arnaud & Butaud, Jean-François, 2023, The French Polynesian Atractocarpus Schltr. & K. Krause (Rubiaceae): circumscription of A. tahitensis and description of A. teamotuaitaui sp. nov., both microendemic and critically endangered species in the Society Islands, Adansonia (3) 45 (10), pp. 151-159 : 154

KEY TO SPECIES OF ATRAcTocARpUS IN FRENCH POLYNESIA (SOCIETY ISLANDS: TAHITI-RAIATEA):

1. Leaves generally elliptic with an attenuate base and a petiole longer than 10 mm long, corolla lobes/corolla tube length ratio between 1.3 to 1.5 ..................................................... Atractocarpus tahitensis (Nadeaud) Puttock

— Leaves generally elliptic-ovate with a rounded-cordate base and a petiole less than 4 mm long, corolla lobes/ corolla tube length ratio equal or above 2 ................... Atractocarpus teamotuaitaui Mouly & Butaud , sp. nov.