Oviala

Ny oviala dia zavamaniry isan-karazany tsy ambolena fa maniry hoazy, ao amin' ny vondron-karazana Dioscorea (fianakaviana Dioscoreaceae) izay tadiavina mba hihinanana ny vodiny. Ireto misy ohatra vitsivitsy:

 Dioscorea sambiranensis,
 Dioscorea heteropoda, 
 Dioscorea trichantha,
 Dioscorea ovinala.
 Dioscorea bemarivensis
 Dioscorea sakalava
 Dioscorea deltoidea
 Dioscorea abyssinica
 Dioscorea alata
 Dioscorea bulbifera
 Dioscorea dumetorum
 Dioscorea esculenta
 Dioscorea hispida
 Dioscorea praehensilis
 Dioscorea trifida
 Jereo koa 

 Dioscorea
 Ovy (dioscorea)
 Ovy famboly

 Loharano sy fanamarihana