Catunaregam is a genus of flowering plants in the family Rubiaceae (tribe Gardenieae), order Gentianales. The genus was established by Wolf and comprises approximately 14 species of spiny, deciduous shrubs or small trees, native to tropical Africa and tropical Southeast Asia. Members of the genus typically bear thorns and produce yellow, globose berries. The type species and most widespread member is Catunaregam spinosa (mountain pomegranate), which ranges from southern China through the Indian subcontinent to Malaysia and Indonesia, growing in thickets, streamside forests, and on mountain slopes at elevations up to 1,600 metres. The genus has a complex taxonomic history, with many species formerly placed in Randia, Xeromphis, Gardenia, and other related genera. Several species, particularly C. spinosa, have a long history of use in Ayurvedic and local traditional medicine, with documented emetic, antispasmodic, anti-inflammatory, and astringent properties, as well as use as a dye and fish poison.
Distribution
Catunaregam has a disjunct paleotropical distribution spanning tropical Africa and tropical Southeast Asia. African species occur from Guinea and Eritrea in the north southward through Central and East Africa to South Africa (KwaZulu-Natal, Transvaal) and Eswatini. Asian species range from Pakistan and the Indian subcontinent through southern China, Indochina, and the Malay Peninsula to Java and Sumatra.
Taxonomy
The genus Catunaregam was established by Wolf and belongs to the tribe Gardenieae within the family Rubiaceae. The type species is Catunaregam spinosa. Many species now placed in Catunaregam were formerly classified under allied genera, including Randia, Xeromphis, Gardenia, Genipa, Posoqueria, Canthium, Ceriscus, Narega, and Lachnosiphonium, among others. Six heterotypic synonym genera are recognized: Canthopsis, Ceriscus, Lachnosiphonium, Lepipogon, Narega, and Xeromphis. The genus contains both African and Asian species and has been revised by multiple authors including Tirvengadum, Bridson, and Gonçalves.
Ecology
Catunaregam species typically grow in thickets or forests at stream sides, on hills and mountain slopes, and in valleys and fields, at elevations from near sea level to about 1,600 metres. They are deciduous shrubs pollinated by bees. At least some species can be coppiced.
Cultivation
Catunaregam species are primarily wild plants; C. spinosa is listed with a cultivation status of "wild." Plants can be coppiced, and at least some species may adopt a climbing habit under certain conditions. No commercial cultivation practices are documented.
Traditional Uses
The most widely utilized species, Catunaregam spinosa (mountain pomegranate), has extensive traditional use across South and Southeast Asia. Almost all parts of the plant are employed in Ayurvedic medicine: the fruit rind and pulp serve as an emetic, diaphoretic, and antispasmodic, and are administered for acute bronchitis and asthma. The bark is used as a sedative, nervine carminative, and anodyne, applied internally and externally for rheumatism, bruises, and fever-associated bone aches; it also acts as an astringent for diarrhoea and dysentery. The edible fruit (a yellow berry 2–3 cm in diameter) is gathered from the wild and consumed roasted; raw fruit produces an uncomfortable burning sensation in the throat and is used as a fish poison. The fruit also serves in calico-printing and as a dye colour intensifier, while the bark yields a separate dye. The plant is known by diverse local names including kukuruman (Sinhala), karai (Tamil), Madanphal (Nepali), Manga (Telugu), and gelphal (Marathi).
