Calochortus occidentalis (Liliaceae), a new species from western Mexico

Calochortus fuscus Schultes (1829: 131) was described based on material collected by Wilhelm Friedrich von Karwinski in Mexico, who participated in two excursions in Mexico (1827-1832, 1841-1843). His collections were purchased by European institutions, especially by Botanische Staatssamlung München (M) in Munich, Germany. Calochortus fuscus is the only species of Calochortus section Cyclobothra Sweet (1828: t273) deposited at M. For his monograph, Ownbey (1940) had access to a photograph of the type of C. fuscus, but he confused this with C. spatulatus Watson (1879: 267) and described C. hintonii Bullock ex Ownbey (1940: 524) based on C. fuscus fresh material (McVaugh 1989). It is now well accepted that C. hintonii is a synonym of C. fuscus. The type locality of C. fuscus was not clarified in the description or the label attached to specimens. We tracked Karwinki’s excursions in Mexico and found out that he made a trip to Temascaltepec, State of Mexico, in September of 1827 (McVaugh 1972), which corresponds with the date on the type collection. © 2018 Magnolia Press.