Pelargonium echinatum has a number of different colors in habitat. They range from deep purple through light purple, dark and light pink and white. Different collections may have blotches on the upper petals only, or blotches on all five petals.
'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.