Typification of six Philip Miller names of temperate North American Toxicodendron (Anacardiaceae) with proposals (999–1000) to reject T. crenatum and T. volubile

Abstract

SummaryReveal, J. L.: Typification of six Philip Miller names of temperate North American Toxicodendron (Anacardiaceae) with proposals (999–1000) to reject T. crenatum and T. volubile. ‐ Taxon 40: 333–335. 1991. ‐ ISSN 0040‐0262.When Philip Miller proposed Toxicodendron (Anacardiaceae) for those species of Rhus generally called “poison‐ivy” he accounted for six species from temperate eastern North America; previously, Linnaeus had recognized only two in Rhus. To date the Miller names have been essentially ignored, and none effectively typified. As now typified, T. pubescens becomes the earliest available name for the illegitimate T. toxicarium Gillis and for T. quercifolium (Michaux) E. Greene. Two Miller names are proposed for rejection, T. crenatum and T. volubile, to allow continued use of T. rydbergii Small ex Rydb. This is proposed simply to preserve nomenclatural stability.