Convolvulaceae are a group of about 60 genera and more than 1,650 species of mostly herbaceous vines, but also trees, shrubs and herbs. According to the study of D. F. Austin the family Convolvulaceae can be classified in the tribes Ericybeae, Cressea, Convolvuleae, merremioids, Ipomoeae, Argyreiae, Poraneae, Dichondreae and Cuscuteae (sometimes classified as a separate family Cuscutaceae).
Members of the family are well known as showy garden plants (e.g. morning glory) and as troublesome weeds (e.g. bindweed).
An unopened spiral bud of a morning glory flower, Ipomoea purpurea