Red pencil markings on lower right corner of p. .
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 Chysis aurea, is of five views of interior of plant with details in green and yellow. Two small, crude sketches on p. . Drawing on p.  is includes three views, in yellow, orange, and red, of interior of Miltonia regalli and five views of interior of Chysis aurea.
Chysis aurea is a type of orchid; Miltonia regnellii, commonly known as the Regnell's Miltonia, is a type of orchid native to southeastern and southern Brazil.
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.