CONTENTS.

Page.
Monograph of the Grasses of the United States and British America. [Part I.]
By George Vasey. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Preliminary revision of the North American species of Cactus, Anhalonium,
and Lophophora. By John M. Coulter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Flora of the Sand Hills of Nebraska. By P. A. Rydberg . . . . . . . . . . . . . . . . . . 133
Report on a collection of plants made by J. IT. Sandberg and assistants in
northern Idaho in the year 1892. By John M. Holzinger. . . . . . . . . . . . . . . . 205
Report on Mexican Umbelliferæ, mostly from the State of Oaxaca, recently
collected by C. G. Pringle and E. W. Nelson. By John M. Coulter and J. N.
Rose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
Descriptions of plants, mostly new, from Mexico and the United States. By J.
N. Rose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311
Botany of Yakutat Bay, Alaska:
1. Field Report. By Frederick Funston . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
2. Botanical Report. By Frederick Vernon Coville. . . . . . . . . . . . . . . . . . . . . 334
Preliminary revision of the North American species of Echinocactus, Cereus,
and Opuntia. By John M. Coulter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357
Flora of the Black Hills of South Dakota. By P. A. Rydberg . . . . . . . . . . . . . . 463
Report on a collection of plants made by C. II. Thompson in southwestern
Kansas in 1893. By A. S. Hitchcock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 537
Crepis occidentalis and its allies. By Frederick V. Coville. . . . . . . . . . . . . . . . . 559
Plants from the Big horn Mountains of Wyoming. By J. N. Rose . . . . . . . . . . 567
Leibergia, a new genus of Umbelliferæ; from the Columbia River region. By
John M. Coulter and J. N. Rose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 575
Roseanthus, a new genus of Cucurbitaceæ a from Acapulco, Mexico. By Alfred
Cogniaux, Verviers, Belgium. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 577