More about italics.
Current issue of the Orchid Digest has an article about Paphiopedilum delenatii. The species and two forms of the species, 'albinum' and 'vinicolor' are in italics. Albinum is all white with a yellow staminode and vinicolor has a deeper purpley pouch much darker than the typical bubble gum pink.
Paphiopedilum delenatii f. vinicolor, all three are in italics, excepting the "f".
Same for Paphiopedilum delenatii f. albinum.
Article was written by a world class Paphiopedilum grower/ breeder / lecturer Harold Koopowitz.
Food for thought and I am always hungry!!!