RUODORA. — A monthly journal of botany, devoted primarily to the flora of New 

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KEY TO NEW ENGLAND TREES, Wild and Commonly Cultivated, 

 based primarily upon leaf characters, by J. Franklin Collins and 

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 Providence, R. I. 



CARD-INDEX OF NEW GENERA, SPECIES AND VARIETIES OF 

 AMERICAN PLANTS, 1885 TO DATE. 



For American taxonomists and all students of American plants the 

 most important supplement to the Index Kewensis, this catalogue 

 in several ways exceeds the latter work in detail, since it lists not 

 only the flowering plants, but pteridophytes and cellular crypto- 

 gams, and includes not merely genera and species, but likewise sub- 

 species, varieties and forms. A work of reference invaluable for 

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GRAY HERBARIUM of Harvard University, 



Cambridge, Mass., U. S. A. 



CHECK LIST OF GRAY'S MANUAL, 7th EDITION, compiled by 

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MEMOIRS OF THE GRAY HERBARIUM. A series of illustrated 

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Vol. 1. Monograph of the genus Brickellia, by B. L. Robinson 

 (with 96 text figures effectively illustrating all known species of the 

 genus). Feb. 1917. $3.00. 



Gray Herbarium of Harvard University, Cambridge, Mass. 



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