It should not be forgotten, however, that the lesions of the disease known as contagious pleuropneumonia may be confined to the serous membranes of the thorax, or they may be confined to the parenchyma of the lungs; they may affect a whole lobe, or only a small portion of it; they may or may not cause the so-called marbled appearance.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
In cross section this tissue resembles parenchyma, and appears as if it were made up of rounded cells.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
In the root the active substance usually resides in the bark, sometimes in the parenchyma that envelopes the woody tissue and rarely in the woody tissue itself, as, for example, in "rhubarb" and "pareira brava."
"The Medicinal Plants of the Philippines"
T. H. Pardo de Tavera