RHODORA.— A monthly journal of botany, devoted primarily to the flora of New 
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KEY TO NEW ENGLAND TREES, Wild and Commonly Culti- 
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UPON It. 
CARD-INDEX OF NEW GENERA, SPECIES AND VARIE- 
TIES 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 merely the flowering 
plants, but pteridophytes and cellular cryptogams, and includes not merely 
genera and species, but likewise subspecies, varieties and forms, A work 
of reference invaluable for larger herbaria, leading libraries, academies of 
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GRAY HERBARIUM of Harvard University, 
, Cambridge, Mass., U. S. A. 
CHECK LIST OF GRAY'S MANUAL, 7th EDITION, compiled 
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Vol. I. 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. 
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