Britannica AI Icon
Adding us as a Preferred Source tells Google you trust our content, so our articles show up more often in your Google Search, Discover feed, and AI Overviews.
verifiedCite
While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.
Select Citation Style
Feedback
Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login).
Thank you for your feedback

Our editors will review what you’ve submitted and determine whether to revise the article.

External Websites

Disa, genus of about 175 species of terrestrial orchids (family Orchidaceae). They grow in marshes and grasslands in southeastern Africa, in Madagascar, and on nearby islands. Red disa (Disa uniflora), a South African species, bears pink and scarlet flowers and is cultivated as an ornamental.

Most species bear flowers ranging in colour from white to purple to red and in diameter from about 0.5 to 10 cm (about 0.2 to 4 inches). The flowers are borne singularly or in racemes. The upper sepal of each flower usually has a spur and stands upright, forming a hood. Most species feature fleshy tuberous roots from which the leaves emerge annually.

This article was most recently revised and updated by Melissa Petruzzello.