1) Mushroom-shaped 
shaped like a fungus
• (a.) Shaped like a fungus or mushroom.
(fun´jĭ-form) shaped like a fungus, or mushroom.
Fun'gi·form adjective [ Eungus + -form : confer French fongiforme .] Shaped like a fungus or mushroom. Fungiform papillæ (Anat.) , 
Type: Term Pronunciation: fŭn′ji-fōrm Definitions: 1. Shaped like a fungus or mushroom; applied to any structure with a broad, often branched, free portion and a narrower base. Synonyms: fungilliform
Fungiform: Mushroom-shaped. From fungi-, fungus + forma, shape. The fungiform papillae are broad flat structures that house taste buds in the central portion of the dorsum (back) of the tongue. These papillae were thought to resemble a fungus: a little mushroom.
having the form of a fungus or mushroom.