Piedraia

Piedraia is a genus of fungus within the Piedraiaceae family in the Capnodiales order.

There are 2 known species (according to Species Fungorum);
 * Piedraia hortae
 * Piedraia quintanilhae

Former species;
 * P. hortae var. paraguayensis = Piedraia hortae
 * P. javanica  = Piedraia hortae
 * P. malayi  = Piedraia hortae
 * P. sarmentoi  = Piedraia hortae
 * P. surinamensis  = Piedraia hortae
 * P. venezuelensis = Piedraia hortae

Piedraia hortae is responsible for causing black piedra.