Piedraia is a genus of fungus. Piedraia hortae is responsible for black piedra. ...
A genus of fungi, based on Piedraia hortae, which is probably the only species and which causes black piedra. ... Origin: see piedra ... (05 Mar 2000) ... 
Type: Term Pronunciation: pī′ĕ-drī′ă Definitions: 1. A genus of fungi, based on Piedraia hortae, which is probably the only species and which it causes black piedra.