Botanical Overview
Cajanus scarabaeoides is a species in the Fabaceae family. The legume family (Fabaceae) includes trees, shrubs, and herbs that produce pods (legumes) and form nitrogen-fixing root nodules through symbiosis with bacteria. The flowers are typically pea-shaped with five petals. This large family provides food staples, timber, and numerous medicinal species. Phytochemical data for this species are limited at present.
General Description
Of the 32 different species within the genus Cajanus, only one, C. cajan (pigeonpea), is cultivated. Cajanus scarabaeoides is the closest wild relative to C. cajan, and is one of the easiest wild species to cross with pigeonpea cultivars. C. scarabaeoides is found naturally in both temperate and tropical zones around the globe. This species has higher levels of drought tolerance, is found to have greater protein content, and has higher levels of resistance to insect pests compared to cultivated types. These genetic traits can be crossed with C. cajan to improve the crop’s productivity. For subsistence farmers, this can reduce economic losses and drastically improve overall crop yield.
Family Context
The Fabaceae family is large and globally distributed. Notable medicinal members include:
- Soybean — 76 documented uses
- Crab’s Eye — 73 documented uses
- Tamarind — 59 documented uses
- Common Indigo — 51 documented uses
Geographic Distribution
Cajanus scarabaeoides has been recorded in 10 countries and territories worldwide, including Australia, China, Indonesia, India, Sri Lanka, and others.
Active Compounds
Phytochemical research has identified 2 compounds in this species: genistein, hydroxygenistein.
Research Status
Although this species has documented phytochemical constituents, its ethnobotanical and clinical documentation remains incomplete. Systematic pharmacological studies are needed to validate the traditional uses attributed to this species.