heterœcism

alternative heteroecism

1. uncountablebiologyDevelopment of different stages of the same growth on different host‐plants; production of the æcidiospores or conidia of a fungus on one host, and of its uredospores and teleutospores on another.

   Without entering upon the question generally, of whether most superstitions have not a strain, however meagre, of truth underlying them, this sentiment has not been without considerable influence in rendering us chary of accepting the heterœcism of Puccinia graminis.

   1881, Charles B. Plowright, Grevillea, volume X, page 34