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Genus Diplotropis in Subfamily Papilionoideae

In botanical taxonomy, a genus (plural genera) is a rank used to group closely related species within a family. In the hierarchy, genus sits below family and above species.

Genera are defined by shared morphological, anatomical, and genetic characteristics (for example, features of flowers, fruits, seeds, or leaves) that indicate a close evolutionary relationship among the species they contain.

Each genus can include one or more species. Examples include Rosa (roses) and Solanum (nightshades, including tomato and eggplant).

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Genus Description

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Diplotropis (family Fabaceae) is a Neotropical tree genus of about twelve accepted species (POWO, 2024; WFO, 2024). It occurs primarily in lowland rain‑forest of the Amazon basin, with additional populations in the Guianas, eastern Bolivia and northern Colombia, and it reaches into seasonally dry forest of Central America. The type species is Diplotropis purpurea Benth., which serves as the nomenclatural anchor for the name.

Morphologically the genus is distinguished by large, unarmed trees bearing alternate, imparipinnate leaves with two to six leaflet pairs, stipules that fall early, and a ferrugineous indumentum on young growth. Flowers are arranged in axillary racemes or loose panicles and exhibit the typical papilionaceous corolla: a broad, often purple‑tinged standard, spreading wings and a keeled petal. The superior ovary is sessile, contains two to five ovules and bears marginal placentation. Fruits are flattened, indehiscent legumes, sometimes winged, bearing one or two hard‑coated seeds.

Species richness peaks in the Amazonian lowlands, where several endemics are confined to floodplain forests; a few taxa extend to higher elevations (

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