Title: On colour forms ofOpuntia weberi (Cactaceae)with notes on the typification of the name
Abstract: Eggli, U. & Leuenberger, B. E.: On colour forms of Opuntia weberi (Cactaceae) with notes on the typification of the name. — Willdenowia 28: 175–180. 1998. — ISSN 0511-9618.A pink-flowered population of Opuntia weberi is reported from San Juan Province, Argentina. The variation and geographical distribution of the species are discussed. Investigation of the extant original material confirms the choice of a type specimen by Kiesling in 1984 to be appropriate.