Botany
Payañgit is a twining, half-woody plant with very slender, smooth branches. Leaves are opposite, ovate to broadly ovate or somewhat rounded, 9 to 16 cm long, 5 to 10 cm wide, with pointed tip and heart-shaped base. Flowers are small, fragrant, yellowish green, borne in alternating clusters at the axils of the leaves, and 4 to 7 cm long. The fruit or follicle is lanceolate and somewhat angular, 5 to 8 cm long, and densely covered with hairs. Seeds are compressed and provided with profuse, silky-white hairs.

Distribution
In secondary and primary forests at low and medium altitudes.

Constituents
Stems yielded pregnane glycosides.
Plant yields an indigo dye, for which it is sometimes grown.

Properties
Its dye, like true indigo, is regarded as a good black dye for the hair.

Parts used
Leaves

Uses
Folkloric
Leaves sometimes used internally for stomach aches and vaguely diagnosed intestinal afflictions.
In the Sikkim Himalayas, leaf juice taken three times daily for stomachaches. source
Others
Dye: In Burma, green is produced by dipping threads that have been dyed yellow in a boiling decoction of the leaves and twigs of the creeping Marsdenia tinctoria. source

Studies
• Pregnane Glycosides: Study yielded three new pregnane glycosides, tinctorosides A-C, together with one known pregnane glycoside, stephanoside B, from the stems of M tinctoria.

Availability
Wild-crafted.

Additional Sources and Suggested Readings
(1)
Three New Pregnane Glycosides from Marsdenia tinctoria / Zhu-Lin Gao, Hong-Pin He et al / Helvetica Chimica Acta, Volume 92 Issue 9, Pages 1775 - 1781 / DOI 10.1002/hlca.200900072
(2)
Antifertility principles from Marsdenia tinctoria: Pharmacological and phytochemical studies / Chowdhury A.K.A., Khan M.O.F., Hashim M.F.Pure and Applied Chemistry, 66(10/11), 2343-2346, 1994