In TSA, they can form grey colonies with black centers and dentated borders that look similar to flowers (C. gravis), or continuous borders (C. mitis), or a mix between the two forms (C. intermedium).
No medio TSA poden formar colonias de cor cincenta con centros negros e beiras dentadas, que semellan flores (C. gravis), ou con beiras continuas (C. mitis), ou unha mestura entre esas dúas formas (C. intermedium).