In botany , papillae are small, wart-like elevations on plant organs that arise from the protrusion of cells or cell groups.
In mosses this protrusions are again differentiated: There are called papillae only solid, wart-like growths, whereas hollow Zellvorwölbungen as nipples are called. In the cactus family , this term is also used for wart-like elevations that are supported by the areoles .
In mycology , the term "papilla" denotes a pointed or warty elevation in the middle of the hat .
The adjective is papillous or mamillös .
Gerhard Wagenitz : Dictionary of botany. Morphology, anatomy, taxonomy, evolution. With English-German and French-German registers . 2nd expanded edition. Nikol, Hamburg 2008, ISBN 978-3-937872-94-0 , pp.190, 231 (licensed edition 2003).