Keys to spring plants,

"For the identification of the Pteridophyta, Gymnospermae and the commoner species of early-flowering Angiospermae found in the vicinity of Ithaca, New York."

Catalogue of the Mesozoic plants in the Department of Geology British Museum (Natural History). The Wealden flora.

Each plate accompanied by guard sheet with descriptive letterpress.

Flora sicula /

Includes indexes.