They are found in the Compoeitae (Cickoriaceae), Campanulaceae, Papaveraceae, Loheliaceae, Papayaceae, in some Aroideae and Musaceae, and in Euphorbiaceae (Manihot, Ilevea).
It produces Indian corn and other cereals and potatoes in the colder regions, and tropical fruits, sweet potatoes and mandioca (Jatropha manihot, L.) in the low tropical valleys.
" Ceara " or Manigoba rubber is derived from species of Manihot, chiefly Manihot Glaziovii, a native of S.
The plantations of Manihot established in E.
Other species of Manihot are also under trial, and some give promise of good results, especially M.
Manihot Glaziovii belonging to the Euphorbiaceae is the tree of N.E.
It is closely related to the Manioc, cassava or tapioca plant (Manihot utilissima) which it resembles when young and exhibits a similar tuberous root system.
- Manihot Glaziovii.
The Manihot tree has been widely introduced into other countries, and appears to succeed wherever the rainfall is not excessive.
The Manihot tree also promises well in E.
One of the most common and important productions of Brazil is mandioca (Manihot), of which there are two well-known species, M.
Yuca (Manihot utilissima), known as cassava in the West Indies and mandioca in Brazil, is also widely cultivated for food and for the manufacture of starch.
Rice, cotton, sugar-cane, yucas (Manihot aipi) and tropical fruits are produced in the irrigated valleys of the coast, and wheat, Indian corn, barley, potatoes, coffee, coca, &c., in the upland regions.
The indigenous economic plants are few, and are of no commercial value, excepting wild ginseng,bamboo, which is applied to countless uses, and "tak-pul" (Hibiscus Manihot), used in the manufacture of paper.
In the sub-tropical and tropical zones the indigenous plants are the sweet potato, cassava (Manihot utilissima and M.
Brasiliensis), growing along the river courses in the yungas regions of the north, though manicoba rubber is also obtained from Manihot Glaziovii on the drier uplands.