180 



Apocynum, 87. 



Apple of Peru, 86. 



Aquifoliaccse, 74. 



Aquilegia, 30. 



Arabis, 38. 



AraceaB, 103. 



Aralia, 57. 



Ai'aliacese, 57. 



Aramantus, 15, 91. 



Archangel ica, 56. 



Arctostaphylos, 72. 



Arenavia, 38. 



Arethusa, 108. 



Argemone, 32. 



Arissema, 103. 



Aristida, 125. 



Aristolochiacese, 89. 



Arrhenatlierum, 128. 



Arrow Arum, 103. 



Arrow-leaved Tear-thumb, 92. 



Arrow-wood, 59. 



Artemesia, 67. 



Artemisia Absinthium, 15, 67. 



Arthonia, 155. 



Arum Family, 103. 



Asarum, 89. 



Asclepiadaccse, 87. 



Asclepias, 87. 



Asparagus, 112. 



Asperoeoccus, 163. 



Asperugo, 83. 



Aspidium, 134. 



Asplenium, 134. 



Aster, 61. 



Atrichum, 140. 



Atrichura (Polytrlchum), 171. 



Atriplex, 90. 



Aulacomonion, 140. 



Austrian Pine, 101. 



Avena, 128. 



Azalea (Rhododendron), 73. 



Bseomyces, 154. 

 Bald Cypress, 102. 



Ballota, 83. 

 Balm-of-Gilead, 100. 

 Balsam, 41. 

 Bangia, 102. 

 Baptisia, 47. 

 Barbarea, 33. 

 Barberry, 31. 

 Barberry Family, 31. 

 Barbula, 139. 

 Barley, 128. 

 Barn-yard Grass, 130. 

 Bartonia, 87. 

 Bartramia, 141, 171, 172. 

 Bartramiese, 141. 

 Basket Osier, 99. 

 Bass-wood, 40. 

 Bayberry, 98. 

 Bayonet Rush, 113. 

 Beach Pea, 46. 

 Beach Plum, 47. 

 Beaked Hazelnut, 98. 

 Bearberry, 72. 

 Beard Grass, 123. 

 Bear Oak, 97. 

 Bedstraw, 59. 

 Beech, 97. 

 Beech-drops, 77. 

 Beech Fern, 134. 

 Beggar's-lice, 84. 

 Beggar- ticks, 66. 

 Bellflower, 70. 

 Bellwort, 111. 

 Belpharozia, 145. 

 Benjamin Bush, 93. 

 BerberidaceEe, 31. 

 Berberis, 31. 

 Betula, 98. 

 Betulacese, 98. 

 Biatora, 154. 

 Bidens, 66. 

 BignoniacesB, 77. 

 BIgnonia Family, 77. 

 Blnd-weed, 84. 

 Birch Family, 98. 



