Typification of Mexican Euphorbia (Euphorbiaceae) Author Steinmann, Victor W. 0000-0003-0103-9575 Instituto de Ecología, A. C., Centro Regional del Bajío, Av. Lázaro Cárdenas 253, 61600 Pátzcuaro, Michoacán, Mexico. steinmav@gmail.com text Phytotaxa 2023 2023-12-12 630 1 61 68 https://phytotaxa.mapress.com/pt/article/download/phytotaxa.630.1.5/51357 journal article 10.11646/phytotaxa.630.1.5 1179-3163 10361687 Euphorbia luciismithii Robinson & Greenman (1897 [1896]: 36). Lectotype (designated here):— MEXICO . Oaxaca : Rancho de Calderón , 5500 ft , 13 August 1894 , L.C. Smith 181 ( GH barcode 00021919 !; isolectotype MEXU barcode MEXU00018091 !). This attractive shrub is restricted to southern Mexico , and four collections from the state of Oaxaca were cited in the protologue: Nelson 1880 , Pringle 4903 , Smith 181 , and Smith 182 . Standley (1923) in his monumental treatment Trees and Shrubs of Mexico indicates the “type from Rancho de Calderón, Oaxaca ” without mentioning a specimen or herbarium. This locality corresponds to the collection site of Smith 181 , and the specimen at GH is here selected as the lectotype .