O. Schwarz (in Repert. Spec. Nov. Regn. Veg. 47: 288. 1939) was the first in recent years to draw attention to the Genera Plantarum Vocabulis Characteristicis Definita of N. M. von Wolf and to the fact that certain generic names were validly published in it for the first time. Mansfeld (in Repert. Spec. Nov. Regn. Veg. 48: 267. 1940; op. cit. 49: 42. 1940) and H. P. Fuchs (in Verh. Naturf. Ges. Basel 72: 344-345. 1961), however, argue that none of the names in Wolf’s work can be regarded as validly published. A study of the work and the others associated with it (Wolf, Goncordantia Botanica, 1780; Genera et Species Plantarum Vocabulis Characteristicis Definita, 1781) has led me to the opposite conclusion, and in my view some twenty generic names are in fact validly published in Wolf’s Genera. Bibliographic details of the works in question are; Genera Plantarum / Vocabulis Characteristicis / Definita / 1776. [l]-8, table (bound in), [1]-[178]. 8°. There is no indication of author. Pp. 3-177 of the main text are numbered, and on the un-numbered verso of p. 177 there is a list of “Errata”. Goncordantia / Botanica. “Nota” on verso of title. 147 pp. innum., sign. A-S 4°, sign. T folio with blank verso to second leaf. Footnote at end of text ([T2] recto) “Dantisci. Typo Mülleri & cura N. M. de Wolf. 1780.” Genera et Species / Plantarum / Vocabulis Characteristicis / Definita. / In Marienwerder, / Typis Joan. Jac. Kanteri Typogr. Aulici / 1781. [1J-454 (table pasted in after p. 10) [this is the same table as is bound in after page 8 in the Genera], 8 pp. innum. (sign.* “Additamentum Alterum / Sibiricae Cel. Dni. Pallas. / et Aliae Quaedam.”), table.