INDEX TO VOL. XIII. 
Names of Orders are in SMALL CAPITALS ; of admitted Genera and Species and other proper names, in roman type ; 
Acacia albida, 19. 
Acacia leucacantha, 19. 
Acacia tortuosa, 19. 
Acer barbatum, 7. 
Acer barbatum, var. Floridanum, 7. 
Acer barbatum, var. grandidentatum, 8. 
Acer barbatum, var. nigrum, 8, 9. 
Acer Floridanum, var. acuminatum, 7. 
Acer leucoderme, 7. 
Acer microphyllum, 11. 
Acer nigrum, 9. 
? Acer mgrum, 8. 
Acer palmifolium, var. concolor, 9. 
Acer palmifolium, var. nigrum, 8. 
Acer rubrum, distribution of, 11. 
Acer rubrum, 11. 
Acer rubrum, B, 11. 
Acer rubrum, subspec. microphyllum, 11. 
Acer rubrum, subspec. semiorbiculatum, 11. 
Acer rubrum, var. tridens, 11. 
Acer Rugeli, 8. 
Acer saccharinum, 8. 
Acer saccharinum, subspec. Rugelii, 8. 
acer saccharinum, subspec. saccharinum, var. 
glaucum, 8. 
Acer saccharinum, var. glaucum, 8, 9. 
Acer saccharinum, var. nigrum, 8, 9. 
Acer Saccharun, 7. 
Acer Saccharum, var. barbatum, 8. 
Acer Saccharum, var. Floridanum, 7. 
Acer Saccharum, var. grandidentatum, 8. 
Acer Saccharum, var. leucoderme, 7. 
Acer Saccharum, var. nigrum, 9. 
Acer Saccharum, var. Rugelii, 8. 
Acer semiorbiculatum, 11. 
#sculus austrina, 3. 
Zesculus octandra, var. hybrida, 3. 
4esculus Pavia, B discolor, 3. 
Algarobia glandulosa, 15. 
Arnold, James, 104. 
Ashe, William Willard, 149. 
Beadle, Chauncey Delos, 66. 
Black Maple, 9. 
Boynton, Frank Ellis, 66. 
Brainerd, Ezra, 112. 
Buckeye, 3. 
Canby, William Mariott, 41. 
Ceanothus spinosus, 1. 
Cercocarpus breviflorus, 27. 
Cercocarpus fothergilloides, 29. 
Cercocarpus parvifolius, 27. 
Cercocarpus parvifolius, var. brevifiorus, 27. 
Cercocarpus paucidentatus, 27. 
Cercocarpus Traskiz, 29. 
of synonyms, in italics. 
Chase, Virginius Heber, 46. 
Cherry, Wild, 25. 
Cockspur Thorn, 39. 
Crategus, 31. 
Crategus acutifolia, 51. 
Crategus anomala, 107. 
Crategus aprica, 169. 
Crategus Arkansana, 85. 
Crategus Arnoldiana, 103. 
Cratzegus Ashei, 149. 
Crategus atrorubens, 181. 
Crategus berberifolia, 39. 
Crategus berberifolia, 43. 
Crategus Berlandieri, 91. 
Crategus blanda, 177. 
Crategus Boyntoni, 65. 
Crategus Brazoria, 77. 
Crategus Bushii, 55. 
Crategus Canadensis, 89. 
Crategus Canbyi, 41. 
Crategus candida, 95. 
Crategus Champlainensis, 105. 
? Crategus chlorocarpa, 61. 
Crategus coccinea, 133. 
Crategus coccinea, 134. 
Crategus coccinea macracantha, 135. 
Crategus coccinea pruinosa, 61. 
Crategus coccinea rotundifolia, 134. 
Crategus coccinea subvillosa, 101. 
Crateegus coccinea «, ? mollis, 83. 
Crategus coccinea, var. macracantha, 134, 139, 
147. 
Crataegus coccinea, var. mollis, 101. 
Crategus coccinioides, 115. 
Crategus collicola, 73. 
Crategus collina, 73. 
Crategus Columbiana, 95. 
Crategus consanguinea, 157. 
Crategus cordata, distribution of, 35. 
Crategus corusea, 99. 
Crategus Crus-galli, distribution of, 39. 
Crategus Crus-galli, var. berberifolia, 53. 
Crategus Crus-galli, var. pyracanthifolia, 39. 
Crategus Crus-galli, var. salicifolia, 39. 
Crategus dilatata, 113. 
Crategus dispar, 165. 
Crategus Douglasii, distribution of, 35. 
Crategus Douglasii, var. rivularis, distribu- 
tion of, 35. 
Crategus Downingii, 140. 
Crategus edita, 57. 
Crategus Eggerti, 115. 
Crategus elliptica, 53, 167. 
Crategus Ellwangeriana, 109. 
Crategus Engelmanni, 43. 
Crategus erecta, 49. 
Crategus fecunda, 47. 
Crategus flava, 155. 
Crateegus flava, 156, 159. 
Crategus flava, var. elliptica, 165. 
Crategus flava, var. lobata, 156. 
Crategus Floridana, 159. 
Crategus gemmosa, 141. 
Crategus Georgiana, 63. 
Crategus glabriuscula, 175. 
Crategus glandulosa, 134. 
Crategus glandulosa, 8 macracantha, 147. 
? Crategus glandulosa, B rotundifolia, 134. 
Crategus glandulosa, d succulenta, 139. 
Crategus Harbisoni, 151. 
Crategus Holmesiana, 119. 
Crategus Holmesiana villipes, 119. 
Crategus horrida, 134. 
Crategus Illinoiensis, 143. 
Crategus integriloba, 145. 
Crategus Jonese, 135. 
Crategus lacera, 127. 
Crategus lacrimata, 161. 
Crategus Lettermani, 79. 
Crategus lobulata, 117. 
Crategus lucorum, 125. 
Crategus macracantha, 147. 
? Crategus macracantha, 139. 
Crategus macracantha, var. minor, 147. 
Crategus Margaretta, 137. 
Crategus Mohri, 59. 
Crategus mollis, 83, 84. 
Crategus mollis, 93, 101. 
Crategus nitida, 179. 
Crategus opima, 171. 
Crategus pastorum, 134. 
Crategus pedicellata, 121. 
Crategus pentandra, 129. 
Crategus Peoriensis, 45. 
Crategus pratensis, 81. 
Crategus Pringlei, 111. 
Crategus pruinosa, 61. 
Crategus punctata, distribution of, 35. 
Crategus pyriformis, 97. 
Crategus quercina, 95. 
Crategus Ravenelii, 163. 
Crategus rotundifolia, 65, 134. 
Crategus rotundifolia, a minor, 147. 
Crategus rotundifolia, b succulenta, 139. 
Crategus saligna, 37. 
Crategus Sargenti, 69. 
Crategus scabrida, 123. 
Crategus senta, 167. 
Crategus sera, 87. 
Crategus signatay 53. 
Crategus silvicola, 131. 
Crategus sinistra, 43. 
