Illustration for the term "decurrent".
From the New York Mycological Society Winter 2011 newsletter, by Jason Cortlund, Editor, "decurrent" is defined as:
"Etymology: Latin decurrent-, decurrens; present participle of decurrere to run down; from de- + currere (to run). The adjective "decurrent" describes a physical feature of plants or fungi that runs or extends downward along a stem - such as leaves, gills, or pores. Many species of Cantharellus (chanterelles) and Pleurotus (oysters) feature decurrent gills, which extend from the underside of the cap down the stem."