Title: Monograph of North American Cyperaceae by John Torrey, to which is appended, A Monograph of the North American species of Rhynchospora, by Asa Gray.
Description: p. 191-448, ill., 25 cm.; Extracted from: Annals of the Lyceum of Natural History of New York, v. 3.
Subjects: Cyperaceae., Rhynchospora.