Supplementary features and accessory clouds

Virga appear with most species of Altocumulus. Altocumulus floccus frequently dissipates, leaving very white trails of ice crystal virga. If the Altocumulus floccus completely dissipates, the virga is identified as Cirrus altocumulogenitus.

Mamma, cavum, fluctus and asperitas are sometimes visible in Altocumulus.