The Section Tuberarium of the genus Solanum in Mexico and Central America, 1924

Dr. Rydberg’s PhD thesis and its accompanying illustrations which he himself drew along with F. Emil, a professional artist, are included herein. One of Dr. Rydberg’s works, Flora of the Rocky Mountains, went through two editions in his lifetime but was never illustrated. This collection contains the manuscript for the first edition of this work (1918). Also included is an apparently unpublished manuscript called Vicia, concerning this genus and notes and sketches concerning a publication called A Preliminary Revision of the Genus Lathyrus in North and Central America by T. G. White, as well as a copy of this work annotated by Dr. Rydberg.

Materials related to Dr. Rydberg’s publications can also be found in the Botanical Art & Illustration Collection of the NYBG special collections. The illustrations for his dissertation were drawn by himself and a professional artist named F. Emil. It is not possible at this time to distinguish the difference between the two as Dr. Rydberg did not sign his work. Each of the illustrations bears the stamp 'Examined for Flora of North America'. Also in the collection are drawings by Mary Eaton for other Rydberg publications.