ex Hook, (syn. Bartonia albicaulis). Annual, 20-40cm tall, the branching stems glossy-white, ascending to reclining. Leaves narrowly oblanceolate to linear, toothed or lobed to almost entire, 2-5cm long. Flowers from the uppermost leaf axils, yellow, to 1.2cm across, summer. Western U.S.A. in dry sandy places up to about 2200m. Not choice enough for the rock garden.