Type designations for three names applicable to Mexican species of Dysphania (Chenopodiaceae s. str. / Amaranthaceae s. l.), and a new combination

The names Ambrina dissecta, Chenopodium incisum, and Chenopodium stellatum are taxonomically assessed and their lectotypes are designated, the specimens preserved at P and GH. These three names refer to species currently placed in the genus Dysphania, but no formal combination was published for the species earlier known as Chenopodium incisum. ­Consequently, we here propose the new nomenclatural combination: Dysphania incisa (Poir.) Sandoval-Ortega & Zumaya-Mendoza, comb. nov. (based on Chenopodium incisum Poir.).