DE PLANTIS TOXICARIIS E MUNDO 
NOVO TROPICALE COMMENTATIONES IX 
A NEW SPECIES OF ICHTHYOTOXIC PLANT 
FROM THE AMAZON 
BY 
Ricuarp Evans SCHULTES AND JOSE CUATRECASAS 
The rare bombacaceous genus Patinoa was described 
in 1953 (Cuatrecasas, J.: Rev. Int. Bot. Appl. Agric. 
Trop. Nos. 369-870 (1953) 309, figs. 1, 2, t. 8, 6-18) on 
the basis of P. Almirajo Cuatr., a species native to the 
Pacific coastal regions of Colombia: near Quibdo in the 
Intendencia del Choco. It is a fruit tree cultivated in 
rain forested sites and known locally under the name 
almirajo, source of its specific epithet. 
At the same time (Cuatrecasas, J.: loc. cit. 312, fig. 
3, t. 3, 14), a second species— Patinoa sphaerocarpa 
Cuatr.—was described from the central part of the Bra- 
zilian Estado do Amazonas, where the tree is called cupv. 
In 1902, Jacques Huber (Huber, J.: Bol. Mus. Pa- 
raense 3 (1902) 4830) described Matisia paraensis from the 
eastern Amazon. Recent studies have indicated that this 
concept properly belongs in the genus Patinoa; and, in 
1971, the necessary new combination — P. paraensis — 
was made (Cuatrecasas, J.: Phytologia 20 (1971) 471). 
This species is now known from a number of localities 
in the Brazilian Amazon from Belém, at the mouth of 
the Rio Amazonas, west to the Rio Javari on the Peru- 
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