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Genus Neoraputia in Family Rutaceae

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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Neoraputia (Rutaceae, Sapindales) is a small genus of shrubs and small trees comprising about six accepted species, confined to the Neotropics, especially high‑elevation campos and cerrado of Brazil, with a secondary centre in the Guianas and Paraguay (POWO, 2024; WFO, 2024). The type species is Neoraputia alba (Dunal) Kallunki, designated when the genus was erected (Kallunki, 1994).

Plants are woody, 1–3 m tall, with simple opposite or sub‑opposite leaves bearing translucent oil dots; stipules are absent. Inflorescences are axillary few‑flowered cymes; flowers are actinomorphic with five sepals, five white petals, ten stamens in two whorls; the ovary is superior, syncarpous with four to five carpels, each with two ovules, and the fruit is a small dehiscent capsule with few compressed seeds (Kallunki, 1994). Neoraputia differs from Raputia mainly in leaf arrangement and its slender capsule.

Species richness is highest in the Espinhaço Range and adjacent campos rupestres of Minas Gerais and Bahia; Neoraputia odorata and N. blanchetiana are locally endemic, while N. paucifolia occurs in the Atlantic forest (Mulin et al., 2015). The genus ranges from sea level to about 1 800 m on well‑drained, nutrient‑poor soils of open, fire‑prone habitats.

Pollination is undocumented, but the open white corolla and abundant nectar imply generalist insect visitation (Groppo et al., 2018). Seed dispersal is ballistic: the brittle capsule opens at maturity, releasing seeds to wind or animal movement.

The genus was erected to accommodate species previously placed in Raputia, mainly on leaf arrangement and flower morphology (Kallunki, 1994). Molecular phylogenies place Neoraputia within the Cusparieae, sister to Raputia sensu stricto (Mulin et al., 2015; Groppo et al., 2018). Some recent checklists treat it as a synonym of Raputia, but POWO (2024) and WFO (2024) retain it as distinct.

The genus has limited horticultural use; a few species are cultivated as ornamental shrubs in Brazilian native‑plant gardens, but none are of economic importance as timber or food crops, nor are they considered invasive.

Habitat loss threatens many species; several are threatened by agricultural expansion, mining, and other forms of land conversion. Further studies on reproductive biology and population genetics are needed to guide protection and resolve taxonomic ambiguities.

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