There are a number of different forms of Erodium reichardii that are suitable for light shade. They need good drainage and should generally not be planted outside in Zones 8 and below. They grow on north facing slopes in the Balearic Islands in the Mediterranean. You might think of putting them between stepping stones, in small shallow containers, as an accompaniment to bonsai specimens or in the shade sections of the rock garden.
Erodiium reichardii 'Charm' This is the regular Erodiium reichardii. The cultivar name 'Charm' has been added by someone, but it is the same plant that has been available all along. It has pale pink flowers with darker pink veins.
'Carolyn's Citrine' was discovered by Lance Reiners of Santa Cruz, California and named for his father Donn's wife, Carolyn. It is very dramatic pelargonium with bright yellow cordate (heart shaped) leaves with a variable mid green central blotch and bright lavender pink flowers with a network of reddish purple veins on the two large upper petals. The three lower petals are narrow and unmarked. It grows up to three to five feet high and wide, but can be kept smaller with judicious pruning. It should be grown in temperatures above 32 degrees F. It is patented and propagation is restricted to licensed propagators.