The caravan often was compelled to make a detour around extensive floating masses overgrown with pyrus, or so-called "sudds," from which the breeze brought the poisoned odor of decomposed leaves carried by the current of water.
"In Desert and Wilderness"
Henryk Sienkiewicz
A tall poplar was pointed out to me as a great wonder; it had two species of pyrus growing on its boughs, evidently from seed; one was a mountain ash, the other like pyrus Aria.
"Himalayan Journals V2."
J. D. Hooker
The botanical name of an apple tree is pyrus Malus, of which schoolboys are wont to make ingenious uses by playing on the latter word.
"Herbal Simples Approved for Modern Uses of Cure"
William Thomas Fernie