Binomial Habit Notes References Distribution Common name
(L.) Silva Manso
Climber Plains, Moist
Flora of Tamil
Nadu, VOL. II, 1987
Cuddalore,  Kancheepuram,
Kanniyakumari, Thanjavur, 
Thiruvallur,  Tiruchchirappalli,
Tirunelveli, Tiruvannamalai, Viluppuram



Botanical name Synonyms Family Common name
Operculina turpethum Merremia turpethum, Ipomoea turpethum Convolvulaceae Transparent Wood Rose


Species with description & keys in Flora of China :

Operculina turpethum (Linnaeus) S. Manso

Biodiversity in India, Volume 2 edited by T. Pullaiah (2003)-
Floristic Diversity and Conservation Strategies in India, Volume 3 by Botanical Survey of India, Ministry of Environment and Forests, 1999-
Medicinal Plants in Andhra Pradesh, India By T. Pullaiah (2002)- Details-
Indian species of Ipomoea : 9 posts by 7 authors.

Taxonomy of Indian species of Convolvulaceae is most incomplete mainly because The Plant List, supposed to include all published names of plants on this earth has huge number of names missing, as evidenced by my numerous communications to them. Same is true for the genus Ipomoea. In an attempt to construct an easy to use key I have first tried to compile a list of species described/reported from Indian subcontinent. As usual I have attempted to include all names under Ipomoea described in Flora of British India and some transferred now to other genera. This would be for easy reference to the original Flora, till an Indian revision of the family is published (or has been published?):
I am sure the list will have many omissions and errors. You are requested to kindly help improve it before it is finalized.


     61.  Operculina turpethum (L.) Silva Manso (syn: Ipomoea turpethum (L.) R, Br.)



Recent taxonomy of Convolvulaceae largely revolves around pollen grains and dehiscence if fruits, in addition to usual features of corolla shape, styles and stigma. This is how the closely related genera once placed under Ipomoea are segregated:

Merremia: Pollen smooth, porate; capsule opening irregularly or by 4-valves. 

Operculina: Pollen smooth, porate; capsule circumscissile. 

Ipomoea: Pollen spinose, colpate; fruit dry capsule usually opening by 4 valves; corolla usually glabrous outside; calyx slightly enlarged in fruit. 

Stictocardia: Pollen spinose, colpate; fruit dry capsule splitting irregularly; calyx greatly enlarged enclosing the fruit. 

Rivea: Pollen spinose, colpate; fruit indehiscent; corolla pubescent outside; corolla salverform; stamens attached near middle of the tube; fruits dry 

Argyreia: Pollen spinose, colpate; fruit indehiscent; corolla pubescent outside; corolla funnel-shaped; stamens attached below middle of the tube; fruits usually fleshy or leathery.

Perhaps more as we finalize our list.

Operculina 1 post by 1 author.  

I have updated eFI (efloraofindia) page on Operculina

Attempts have been made to incorporate most of the species available in India & nearby areas with details & keys directly or through links as far as possible.

Species discussed so far in efloraofindia are given at the bottom of the page in the form of links against Subpages. On clicking them one can see all the details.

If someone can provide complete list of Indian species with source references it will be wonderful.

Any comments/ corrections are welcome.