Three new infraspecific taxa of Manihot (Euphorbiaceae) from the Brazilianneotropics

Manihot caerulescens subsp. laevis, M. carthaginensis subsp. hahnii, and M. dichotoma var. undulata, all three assigned herein to section Glaziovianae , are descried and illustrated. Manihot carthaginensis subsp. hahnii appear s endemic to northern and northwestern portions of Minas Gerais. Manihot di chotoma var. undulata and M. caerulescens subsp. laevis are endemic to Braz il's northeastern semiarid phytogeographic region known as caatinga. A new combination is provided for M. glaziovii, which is submerged as a subspecie s in the expanded circumscription of M. carthaginensis.