A genus of trees whose flowers are aggregated in heads of one sunken female and many males. The fruit is an achene embedded in the fleshy receptacle. The achene of B. alicastrum is the breadnut or rámon. B. utile is the cow-tree or milk-tree of Venezuela. It produces copious latex of similar appearance to cow's milk and that is used as a substitute for it. There are 13 species, occurring in tropical America.
Subjects: Plant Sciences and Forestry.