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Family Asclepiadacea
Heterostemma cuspidatum Decne.

Scientific names Common names
Heterostemma cuspidatum Decne. Biniguasan (Tag.)
Stapelia quadragula Blanco Buyok-boyok (Tag.)
Heterostemma manilense Schauer ? Buyok-buyok (Tag.)
  San Bartolome (Tag.)
In Quisumbing's compilation, buyok-buyok is a local name shared by (1) Heterostemma cuspidatum, buyok-buyok (Tag.) (2) Ehretia microphylla, chaang-gubat, buyok-buyok (Sul.), and (3) Momordica cochinchinensis, buyok-buyok, patolang-uak (Tag.).

Buyok-boyok is a slender vine with milky juice and twigs 3 to 4 millimeters in diameter. Old stems are remarkable for their corky wings or ridges. Leaves are smooth, thin, ovate, 6.5 to 17 centimeters long, 3.5 to 10 centimeters wide, pointed at the tip and rounder or somewhat heart-shaped at the base. Flowers are purplish, hairy, about 8 millimeters across, and on slender stalks 1.5 to 2 centimeters long. Corolla segments are broadly ovate, leathery, and horizontally spreading. Follicles are in pairs, smooth, and linear, being 10 to 14 centimeters long. Seeds are flat, concave-convex, oblong, and about 1.3 centimeters long, with numerous, silky white comae.

- Found only in the Philippines.
- In secondary forests and thickets at low altitudes in Rizal, Laguna, Cavite, and Batangas Provinces in Luzon; and in Busuanga.

Leaves considered antiseptic.

Parts used


Ointment made from leaves of the plant used as effective remedy for tropical ulcers.

No studies found.


Last Update September 2014

IMAGE SOURCE: / Photo / Apocynaceae : Heterostemma cuspidatum det. Nathalie Caowynn Juhonewe & Michele Rodda / Flowering plant / Copyright © 2013 by Andrea B. Agillon (contact: pieter.pelser@canterbury.ac.nz) [ref. DOL75606] / Non-Commercial Use / Phytoimages.siu.edu
OTHER IMAGE SOURCE: Photgraph / Heterostemma cuspidatum-ISOTYPE / Museum•National D'Histoire Naturelle

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