Casa Cancha, Peru, Peru, South America - Neotropics
A. stenocephalus A. Gray [ex Wedd.] was first published by Weddell as a nom. nud. in synonymy of Achyrophorus taraxacoides [var.] ß (Chloris Andina 1: 221, t. 41a. 1855 ). Validity and typification of the name Achyrophorus stenocephalus A. Gray uncertain, but was later accepted by Gray (1862, Proc. Amer. Acad. Arts 5: 146), probably to be regarded as an illegitimate (superfluous) replacement name based on A. taraxacoides [sensu?] Wedd. This specimen may be a duplicate of the collection seen by Weddel, upon which he based his A. taraxacoides var. ß.