CONTENTS 
51. Taxonomic and geographic Studies in North American Ferns. 
I. The Genus Athyrium and the North American Ferns allied to 
A. Filix-femina. 
Il. Botrychium virginianum and its American Varieties. With 1 
plate. By F. K. Burrers. 
52. I. Notes on the Systematic Position of Clibadium, with Descriptions 
of some New Species. 
Il. A Revision of the Genus Dimerostemma Cass. 
IIT. New and Noteworthy Compositae, chiefly Mexican. 
IV. Descriptions of New Spermatophytes, chiefly from the Collections 
of Prof. M. E. Peck in British Honduras. By 8. F. Bake. 
53. I. New or otherwise interesting Plants, mostly North American 
Liliaceae and Chenopodiaceae. By J. Francis MAcBRIDE. 
Il. Further new or noteworthy Coal: Plate. ByS. F. Bake. 
III. New Spermatophytes collected in Venezuela and Curacao by 
Messrs. Curran and Haman. Plate. By S. F. Buake. 
IV. New Plants from Oaxaca. By S. F. Buaxe. 
54. A Revision of the genus Vigwiera. With 3 plates. By S. F. BuaKe. 
55. I. Diagnoses and Notes relating to tropical American Eupatorieae. 
II. A descriptive Revision of the Colombian Eupatoriums. 
III. Keyed Recensions of the Eupatoriums of Venezuela and Ecuador. 
By B. L. Rosinson. 
56. I. Further new or otherwise interesting Liliaceae. 
II. A Revision of Mirabilis, Subgenus Hesperonia. 
III. A Revision of Mentzelia, Section Trachyphytum. 
IV. Certain North American Umbelliferae. 
V. Reclassified or new Compositae, chiefly North American Helenieae. 
VI. Various American Spermatophytes, new or transferred. 
By J. Francis MACBRIDE 
57. I. The Unity of the Genus Arenaria. 
Il. The Type of the Genus Alsine. 
III. The Earlier Names for Alsinopsis. 
IV. The American Representatives of Arenaria sajanensis. 
V. The Specific Identity of Arenaria groenlandica and A. glabra. 
VI. The American Variations of Areriaria verna. By M. L. Fernatp. 
