The skin disease Pityriasis (tinea) versicolor was shown to be due to the Microsporon furfur by Eichstedt in 1846.
versicolor is a good name for this bright Cholla since it means “variegated or diversified in color.”
versicolor means changing color, referring to the different bands of color.
IRIS versicolor imberbis foliis ensiformibus, scapo tereti flexuoso, germinibus subtrigonis.
Our plant is the picta of Miller, and the versicolor of Miller is, we believe, the sibirica of Linnæus.