Studies in the Crassulaceae.- III. Sedum Subgenus Gormania, Section Eugormania.
Clausen, Robert T.
Studies in the Crassulaceae.- III. Sedum Subgenus Gormania, Section Eugormania. - U.S.A. 1942.
Studies in the Crassulaceae.- III. Sedum Subgenus Gormania, Section Eugormania. - U.S.A. 1942.