Table 2. Overview of selected characters of members of Penicillium series Roqueforti (after Frisvad & Samson 2004, Sumarah et al. 2005, Nielsen et al. 2006, O’Brien et al. 2006, Månsson et al. 2010). See Karlshøj & Larsen (2005) for further differences in volatiles.

Species	Ehrlich reaction	Reverse on YES	Cleistothecia/sclerotia	Growth rate on CYA30 °C (mm)	Extrolites**
P. carneum	Violet	Cream-beige	-	15–30	Roquefortine C, isofumigaclavine A&B, mycophenolic acid, patulin, cyclopaldic acid, penitrem A, andrastin A, (penicillic acid in CBS 449.78)
P. paneum	Negative	Cream yellow/beige*	-	30–45	Roquefortine C, marcfortin A, patulin, andrastin A, citreoisocoumarin, (botryodiploidin)
P. psychrosexualis	Negative	Mustard-yellow	+	15–25	Andrastin A, mycophenolic, patulin and roquefortine C and the uncharacterized extrolite tentatively named “fumu”
P. roqueforti	Violet	Blackish green	-/(+)	(0–)5–15	Roquefortine C, isofumigaclavine A&B, PR-toxin, andrastin A, citreoisocoumarin, (mycophenolic acid)

*Often turning strawberry-red with age; with colour diffusing into the medium.

**The extrolites mentioned between brackets are not produced by the majority of isolates.