INDEX. 



A 



PAGES 



Abele. (Populus alba, L.) 39,40 



Abies balsamea, Mill. Fir balsam 20-22 



Abietaceae. (Pinoideae) 1-22 



Larix 1-4 



Pinus 4-12 



Picea 12-18 



Tsuga 19,20 



Abies 20-22 



Acacia, (Robinia Pseudacacia, L.) 131,132 



(Eobini'a viscosa, Vent.) 132 



Three-thorned. (Gleditsia triacanthos, L.) .... 129,130 



Aceraceae. (Maple family) 140-153 



Acer barbatum, Michx. Rock, Sugar. Hard maple, Sugar tree 144-146 



barbatum, var. nigrum, Sarg. Black maple .... 146, 147 



dasycarpum, Ehrh. Silver, Soft, White, River maple . 142-144 



Negundo, L. . . Box elder, Ash-leaved maple . . 151-153 



nigrum, Michx. . Black maple 146, 147 



, . _ (Striped maple, Moosewood.) , . _ ._, 



Pennsylvanicum, L. { TT . ' \ . . 149-151 



( nhistlewood ) 



platanoides . . . Norway maple 146 



rubrum, L. . . Red, Swamp, Soft, White maple . 140-142 



saccharinum, L. . Silver, Soft, White, River maple . 142-144 



(Rock, Sugar, Hard maple, 



saccharinum. Wang. { ' > . . 144-146 



( Sugar tree ) 



saccharinum, var. nigrum, T. and G. Black maple. . 146,147 



or. , T , (Rock, Sugar, Hard maple,) HAA .._ 



Saccharum, Marsh. \ y * ' \ . . 144-146 



( Sugar tree ) 



Saccharum, Marsh., var. barbatum, Trelease .... 172 



Saccharum, Marsh., var. nigrum, Britton. Black ?naj9te,146,147.172 



spicatum, Lam. . . Mountain maple 148, 149 



Negundo aceroides, Moench. Box elder, Ash-leaved maple . 151-153 



Negundo, Karst. " " . 151-153 



Ailanthus family. (Simarubaceae) 133 



Ailanthus, Ti-ee of Heaven, Chinese sumac ! * f D US ,5 al 1- j . 133 



( dulosus, Desf. ) 



Alder, European. (Alnus glutinosa, Medic.) 70 



Alnus glutinosa, Medic. European alder 70 



179 



