PlantaeDB Logo
Login Sign-up

Genus Caryocar in Family Caryocaraceae

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).

Do you wish to read more about plant taxonomy? Click here!

Genus Description

Suggest a correction!

Asteraceae family; approximately 20 species; Neotropical lowland to montane forests, savannas, and caatinga; typical type species is Caryocar brasiliense (CB Dont). Caryocar shrubs/trees show dense indumentum of stellate–tomentose trichomes, paired stipules often persistent at nodes, and opposite simple leaves with pinnate venation. Inflorescences are terminal thyrses or panicules bearing small, unisexual or bisexual flowers with a reduced epicalyx, five free sepals, five distinct petals, numerous stamens in fascicles, and a superior ovary of 4–5 fused carpels with axile placentation. The fruit is a large, usually 1–4-seeded drupe with a woody to bony endocarp; seeds contain abundant cyanogenic glycosides typical of Caryocaraceae.

Centers of diversity lie in eastern Brazil (Minas Gerais, Bahia) and the Guianas, with additional species in the Amazon Basin and northern South America. Many taxa are endemics to seasonal forests, campos rupestres, and sandplains; some extend into montane cloud forests up to approximately 1,500 m elevation. The genus shows strong historical connections to disjunct inter-Andean and eastern Brazilian distributions, with ongoing taxonomic complexity in poorly collected regions.

Pollination is predominantly entomophilous and zoophilous (bat-visited recorded for certain taxa), while dispersal involves mammals and water (hydrochory) for large drupes. Caryocar has a well-supported base chromosome number of x=26, with polyploidy reported in some lineages. Life history includes fire-tolerant resprouting in savanna species and pronounced phenological shifts linked to rainfall seasonality.

Classically recognized sections (Glabrescentia, Spathulata) have been partially upheld in recent phylogenies, but monophyly is not universally resolved; New World Caryocar (includes Anthodiscus) has prompted alternative generic treatments, which remain contentious. APG-focused classifications continue to support Caryocaraceae as monogeneric within Malpighiales, though relationships with Ancistrothamnus and other genera are debated. Recent synonymizations (C. tessmannii under C. villosum; reassessment of C. microcarpum) reflect ongoing revision.

Economically, C. brasiliense is a keystone tree for savanna communities (pequi oil, edible fruits), while C. nuciferum yields the edible souari nut; several species provide durable timber and ornamental potential. Weedy tendencies are limited, with localized invasive risk in anthropized landscapes.

Conservation concerns focus on habitat loss due to agriculture and fire; research gaps remain in Amazonian species delimitation and population genomics. Continued integrative taxonomy and protected area designation are essential for preserving Caryocar diversity (Silva-Luz & Pirani, 2020; APG IV, 2016; GBIF, 2024).

Pick a Species to see its components: