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A genus of a single species, discovered in Oregon, USA, in 1930 and described two years later. It is most closely allied to Rhodothamnus and perhaps not separable from it; from that genus it differs only in its scaly (lepidote) leaves and its campanulate rather than rotate corolla. It also bears some resemblance to Kalmia, particularly to K. polifolia, but the anthers are not contained in pockets as they are in Kalmia, and the lepidote leaves also serve to distinguish it from that genus.

Species articles