Red katuk (Euphorbia cotinifolia L ) is one of traditional medicinal plants which some Garut communities using the cooking water of that leaves in treatment of diabetic. Red katuk plant originated from tropic America. The leaves are oval and purple. This plant is a shrub or small tree. This plant can grow in various places, specially in cold areas including some Garut territorial.
Several investigation on red katuk leaves have been performed at Pharmacy Department, Mathematic and Natural Science Faculty , Garut University, i.e the phytochemistry study and antidiabetic effect test of red katuk leaves. The phytochemistry study of red katuk leaves includes the investigation on phenolic acids, antocyanin derivatives and carotenoid.
The botanical study of red katuk leaves included plant classification, local names, morphology and distribution.
a. Plant Classification of red katuk plant (Jones, S. B., Arlene, E. L., 1987)
Kingdom : Plantae
Division : Spermatophyta
Class : Dicotyledoneae
Subclass : Rosidae
Ordo : Euphorbiales
Family : Euphorbiaceae
Genus : Euphorbia
Spesies : Euphorbia cotinifolia Linn.
b. Local names
Local names of red katuk plant are Katuba (Indonesia), Mazanille bobo (Europe), Barrabas (South America), Babayeman, Kastuba (Sunda) (Levan, P., de Foresta, H., 1991).
c. Morphology and DistributionRed katuk plant is a shrub or small tree of 2-6 meters in height. It has very piercing sap. Stem thickness about 0.4-0.6 mm, which has whitish glabrous of 0.1-0.2 mm in lenght. Each stalk usually has 3 leaves. Leaves are rounded triangular to rounded long shape, with 1 mm in thickness, 4-9 cm in lenght, 2.5 – 7 cm in widht, dark grey to purple of colour. Found in gardens and is often used as hedges. It can grow in various places, until at an altitude of 1,400 m above sea level (Burger, W., Huft, M., 1995; Eliovson, S., 1975)