Genus Cabralea in Family Meliaceae
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
Suggest a correction!Cabralea A.Juss. is a small genus of trees and shrubs in the family Meliaceae (APG IV, 2016). About six to seven species are currently accepted (POWO, 2024). The genus is confined to the Neotropics, ranging from lowland rainforest through seasonally dry forest to montane woodland up to 1 500 m, with a distribution centred on the Amazon Basin and the Atlantic Forest. The type species is Cabralea canjerana (Bory) A.Juss., which serves as the exemplar of the genus (Mabberley, 1997).
Morphologically, Cabralea is distinguished by compound, pinnate leaves with a conspicuously winged rachis; the leaflets are alternate, entire or weakly serrate, and the young twigs are often densely pubescent. Stipules are minute and caducous. Inflorescences are axillary or terminal panicles bearing small, pentamerous flowers whose five sepals and five petals are fused at the base, and the ten stamens form a staminal tube typical of Meliaceae. The superior ovary is five‑locular, axile placentation, each locule bearing two ovules. The fruit is a drupe with a fleshy pericarp that splits into five lobes, each containing a single seed (Miller et al., 2006).
Species richness peaks in the Guiana Shield and eastern Brazil, where several narrow endemics occur. C. densiflora is restricted to the cloud forests of the Venezuelan Andes, while C. nitida is confined to Atlantic‑Coastal forest fragments of São Paulo (Harley et al., 2020). The genus thus occupies a spectrum of humid and semi‑humid habitats, from floodplain to submontane forest.
Pollination in Cabralea is poorly documented; the open, actinomorphic flowers suggest meliaceous pollinators (nectar‑feeding insects), and the fleshy drupes are likely dispersed by birds and small mammals (Mabberley, 1997). No base chromosome number has been firmly established for the genus.
Phylogenetically, Cabralea resides in the tribe Cabraleae within subfamily Melioideae (Miller et al., 2006). Molecular analyses recover the genus as monophyletic, but some authors have argued inclusion within Trichilia, a view not supported by recent datasets (Harley et al., 2020). Current treatments recognise six accepted species, with synonyms and provisional designations pending revision (POWO, 2024).
The most widely used species, C. canjerana, yields fine‑grained, pink‑brown timber marketed as “canjer” for furniture and construction, and serves as a shade tree in tropical parks (Mabberley, 1997). No Cabralea species are considered invasive, and none are cultivated as food crops.
Conservation assessments reveal that habitat loss and fragmentation threaten several narrow endemics, yet population data remain sparse. The outlook depends on expanded field surveys, inclusion in regional Red‑List assessments, and the integration of genomic tools to resolve remaining taxonomic uncertainties.