Plectranthus forsteri 'Marginatus' has a distinctive pattern of variegation, with broad, irregular, almost parrallel white zones enclosing a lozenge-shaped green center.
From time to time P. forsteri 'Marginatus' sends out all-white shoots. Very pretty, but they contain no chlorophyll, so they can't feed themselves and will not survive off the mother plant.
This plant has the nicest fragrance when handled.
At the Arboretum in Flagstaff, Arizona, zone 5a-6a, July 16th, late Summer, 7000 ft elevation
Notice the sideshoot revertig to all green..