1. Echinocactus williamsii var. luteus Rouhier

    1. This is a synonym of Lophophora williamsii (Lem.) J.M.Coult.

Echinocactus williamsii var. luteus Rouhier appears in other Kew resources:

First published in Trav. Lab. Matière Méd. École Supér. Pharm. Paris 17: 62 (1927)

Sources

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2018. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0