Some notations penciled in.
Digitized by Harvard Museum of Natural History 2006.
Drawings folded along vertical edge with first drawing on p.  and second drawing on p. . Drawing on p. , labeled Centaurea americana, is of eleven views of exterior of plant with details in green, red, yellow, and blue. Drawing on p. , labeled Dahlia variabilis, is of ten views, mostly of exterior, of plant with details in yellow, orange, and green.
Centaurea americana, commonly known as the American Starthistle or American Basketflower, is native to the southern central United States and northeastern Mexico. Dahlia variabilis is a bushy, flowering plant found in Mexico, Central America, and Colombia.
Red colored pencil markings on p.  and .
This drawing is part of a series of botanical drawings created by the Blaschkas to reference in constructing glass models for the Botanical Museum of Harvard University.