Table 1. Diagnostic characters for Inga coleyana (Leguminosae, Mimosoid clade) and its closest relatives as well as their geographical distribution in the Amazon basin: Northwestern Amazon (NWA), Southwestern Amazonia (SWA), Central Amazon (CA) and the Guiana Shield (GS).
| Characters | I. coleyana | I. cylindrica | I. coruscans |
|---|---|---|---|
| Leaflets pairs | 3 | 3–5 | 2–3 |
| Leaflets apex | Attenuate | Acute to attenuate | Shortly-and arrowly attenuate |
| Leaflets base | Obtuse | Cuneate | Narrowly attenuate or acute |
| Leaflet venation | Brochidodromous | Eucamptodromous to brochidodromous | Eucamptodromous |
| Rachis | Terete or slightly canaliculate | Strongly canaliculate | Semiterete |
| Foliar nectary | Sessile and cyathiform | Sessile and patelliform | Sessile patelliform or cyathiform |
| Inflorescence structure | Lax spike | Congested spike | Very congested spike |
| Corolla tube (length) | 4–5.2 mm | c. 3 mm | 4–5 mm |
| Corolla tube lobes | 5-6 glabrous and glossy | 5 glabrous | 4 puberulous |
| Calyx lobes (length) | 0.2–0.5 mm | 0.25 mm | 0.5 mm |
| Staminal tube (length) | 5.2–7.8 mm | 6–9 mm | 6.5–7 mm |
| Staminal tube exserting corolla tube | 1.05–1.95 mm | c. 3 mm | 3–3.5 mm |
| Stigma morphology | Capitate | Simple | Simple |
| Geographic distribution | Ecuador only | NWA, CA and GS | NWA, SWA |