Compilation of herbal plants (description, geographical distribution, taxonomy, line drawings), biodiversity and herbarium.

Read More
Research & Publication

Description of herbal and T&CM research, searchable publication and process from medicinal plant discovery to clinical trial in producing a high-quality registered herbal drug.

Read More
Traditional & Complementary Medicine (T&CM)


Definition and description of therapies, policy, training and education, research in the practise of (T&CM) and integrated medicine system.           

Read More


News Update

Announcement & Advertisement

Forthcoming Events

Annual Congress on Traditional Medicine

From Wed, 12. May 2021 Until Thu, 13. May 2021

5th International Conference on Medical and Health Informatics (ICMHI 2021

From Fri, 14. May 2021 Until Sun, 16. May 2021

International Conference on Traditional Medicine and Phytochemistry 2021

From Mon, 12. July 2021 Until Wed, 14. July 2021

Asian Symposium on Medicinal Plants and Spices XVII (2020)

From Tue, 17. August 2021 Until Thu, 19. August 2021

Uncaria acida (Hunt.) Roxb.

Uncaria acida (Hunt.) Roxb.




Nauclea acida Hunt., Uncaria ovalifolia Roxb., Uncaria acida var. papuana Valeton.

Vernacular Names

Malaysia Kait-kait, gambir-gambir.
Vietnam Vu[oos]t chua.

Geographical Distributions

Uncaria acida is distributed from Burma (Myanmar) to Thailand, southern Vietnam, Peninsular Malaysia, Sumatra, Java, Lesser Sunda Islands, Borneo, the Philippines and New Guinea.


U. acida is a rather slender climber measuring 4-6 m tall. The hooks measure 2-3 cm long.

The leaves are egg-shaped to elliptical and measure 5-9 cm x 2.5-5 cm. They are papery to partial covered by a leathery texture, hairless, ultimate fine veins, frequently domatia underneath, stomata present on upper surface, stalk measures 10-12 mm long and the 4-7 mm long stipules are deeply bifid.

The flowering head is measuring up to 2 cm in diametre and over 5 cm in fruit. The peduncle measures 1.5-2 cm long. The flowers are subsessile and white. Its sepal tube measures 2 mm long and lobe elliptical to partially flat with circular outline. It measures 1 mm long. Its petal tube measures 5 mm long and hairy outside. The, lobes measure 1.5 mm long and hairy at both sides. The 13 mm x 2-2.5 mm capsule is oblong and pointed at both ends. It is sparsely hairy. The pedicel measures 5-6 mm long and slender. The seed measures 5 mm x 0.5 mm, long wings, white, slender and long acuminate.

Ecology / Cultivation

U. acida is locally abundant in humid primary and secondary forest, also along rivers, on swampy localities at low altitudes.

Line Drawing / Photograph



  1. Plant Resources of South-East Asia No 12(2): Medicinal and poisonous plants 2.

Explore Further

Consumer Data

Consumer data including medicinal herbs, dietary supplement monographs, health condition monographs and interactions and depletions.                                    

Read More
Professional Data

Professional data organized into medicinal herbs, dietary supplement monographs, health condition monographs, T&CM herbs, formulas, health conditions, interactions and depletions.

Read More
International Data

We offer International linkages to provide extensive content pertaining to many facets of T&CM as well as Integrated Medicine. Please register for access.    

Read More