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Family Apocynaceae
Vincetoxicum flexuosum var. perrottetianum (Decne) Schneidt, Meve & Liede

Scientific names Common names
Cynanchum tenellum Blanco Kulangan (Ilk.)
Oxystelma bifidum perrottetiana Llanos Kul-langem (Ilk.)
Secamone macrostachya Turcz. Maraipos-ti-bakir (Ilk.)
Tylophora bifida (Llanos) Fern.-Vill.  
Tylophora exilis Schltr.  
Tylophora luzonica Schltr.  
Tylophora merrillii Schltr.  
Tylophora perrottetiana Decne.  
Tylophora rizalensis Schltr.  
Tylophora whitfordii Schltr.  
Vincetoxicum flexuosum var. perrottetianum (Decne.) Schneidt, Meve & Liede
Tylophora perrottetiana Decne. is a synonym of Vincetoxicum flexuosum var. perrottetianum.
Vincetoxicum flexuosum var. perrottetianum is an accepted infraspecific of Vincetoxicum flexuosum (R.Br.) Kuntze. KEW: Plants of the World Online
Vincetoxicum flexuosum var. perrottetianum is an accepted species. KEW: Plants of the World Online

Gen info
- Vincetoxicum is a genus of plants in the family Apocynaceae. Although sometimes included in Cynachum, chemical and molecular evidence show Vincetoxicum is more related to Tylophora, now included in Vincetoxicum. (2)
- Etymology: The generic name derives from Latin, meaning "poison-beater" referring to the plants' supposed antidotal effects against snakebites. (2)

Kulañgan is a slender, twining, smooth, herbaceous vine, 2 to 5 meters in height. Leaves are green, shining, oblong to oblong-ovate, 5 to 8 centimeters in length, pointed at the tip, with a broad, rounded or slightly heart-shaped base. Inflorescence is terminal and axillary, simple or slightly branched, slender, and 10 to 30 centimeters long. Flowers are numerous, dull-purple, 4 to 5 millimeters in diameter, and borne in scattered, racemosely arranged fascicles; the pedicels are few and about 7 millimeters long. Follicles are green, lanceolate, about 5 centimeters long, 5 millimeters thick below the middle and narrowed upward to the pointed apex.

- Found only in the Philippines.
- In thickets at low altitudes in Cagayan, Ilocos Norte, Bontoc, La Union, Benguet, Pangasinan, Nueva Vizcaya, Nueva Ecija, Rizal and Laguna Provinces in Luzon.

Leaves considered vulnerary.

Parts used


- Leaves used for wound healing and dressing wounds. (3)

No studies found.


Updated March 2023 / August 2022 / June 2020 / January 2014

                                                   PHOTOS / ILLUSTRATIONS
IMAGE SOURCE: / Photo / Apocynaceae : Vincetoxicum flexuosum / Flowering vine / Copyright © 2017 by P B Pelser & J F Barcelona / (contact: pieter.pelser@canterbury.ac.nz) [ref. DOL119705 / Non-Commercial Use / click on image to go to source page / Phytoimages.siu.edu
OTHER IMAGE SOURCE: Tylophora perrottetiana (Oxystelma bifidum, IS) US623775 / Creative Commons: Attribution-NonCommercial 3.0 Unported / Filibot.web / / flickr
Additional Sources and Suggested Readings
Vincetoxicum flexuosum var. perrottetianum / KEW: Plants of the World Online

Vincetoicum / Wikipedia
Tylophora perrottetiana / W. H Brown / Minor Products of Philippine Forewts, 1(3), ed 1884
Tylophora perrottetiana (PROSEA) / Plant Resources of South-East Asia / Pl@ntUse

DOI: It is not uncommon for links on studies/sources to change. Copying and pasting the information on the search window or using the DOI (if available) will often redirect to the new link page. (Citing and Using a (DOI) Digital Object Identifier)

                                                            List of Understudied Philippine Medicinal Plants

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