The genus currently comprises five species (SAcrensen 1988). ... This is largely a coincidence, although it may be explained in part by the history of the Spanish and Portuguese conquest of Latin America. ... Inflorescence is a complex to simple raceme and the flowers have a tubular calyx and a papilionaceous corolla .
|Title||:||Yam Bean: Pachyrhizus DC. - Promoting the conservation and use of underutilized and neglected crops. 2.|
|Publisher||:||Bioversity International - 1996|