glaziovii, also known as Manihot glaziovii, the tree cassava or Ceara rubber tree, is a species of deciduous flowering plant in the spurge family, Euphorbiaceae, that is native to eastern Brazil.

The tree cassava was used a source of rubber, instead of Hevea brasiliensis throughout the world.

[4] This species is useful in cassava breeding because it is a wild relative.

[5] Several quantitative trait loci (QTLs) are known to be usable or in use for introgression into cultivated cassava.

[5] This includes those for cassava brown streak disease resistance found by Abaca et al., 2013 and four found by Nzuki et al., 2017.