Key to Species of Coutarea
1. Corollas zygomorphic, curved in the tube, white to pink, with tube funnelform, 19-60 mm long; anthers exserted.
2. Fruit reddish brown, with lenticels well developed, numerous, and circular; dry forests in South America....Coutarea alba
2'. Fruit gray to brown or black, without lenticels or these few and elliptic; wet to seasonal forests, Mexico to Argentina...Coutarea hexandra
1'. Corollas actinomorphic, straight in the tube, white to pink or red, with tube tubular to funnelform or weakly inflated, 16-20 mm long; anthers partly to completely included.
3. Corolla funnelform, white to pink, with tube 12-16 mm wide at mouth (on dried specimens)....Coutarea coutaportloides
3'. Corolla tubular to tubular-funnelform or weakly inflated, red, with tube 3-7 mm wide at mouth (on dried specimens).
4. Corolla tubular-funnelform to weakly inflated, with tube 4-7 mm wide at mouth; calyx lobes 5....Coutarea andrei
4'. Corolla tubular, with tube 3-4 mm wide at mouth; calyx lobes 7.....Coutarea fuchsioides