XVI 



LIST OF ILLUSTRATIONS 



Dune 



Fig. 82. — Sand Thistle, Cirsium Pitcheri 



Fig. ?>^. — Fore-dune Association 



Fig. 84. — ^Long-leaved Sand Reed, Calamovilja longifolia 

 Fig. 85. — jMarram, Ammophila arenaria 

 Fig. 86. — Sand Cherry, Primus pumila .... 

 Fig. 87. — Furry Willow, Salix syrlicola .... 



Fig. 88. — Cottonwood Zone 



Fig. 89. — Red-osier Dogwood on Steep Side of Advancing 



Fig. 90. — The Pine Association 



Fig. 91. — Bearberry, Arctostaphylos Uva-ursi 

 Fig. 92. — Arbor vitae. Thuja occidentalis 



Fig. 93. — Shinleaf, Pyrola elliptica 



Fig. 94. — Checkerberry, Gaultheria procmnbens . 



Fig. 95. — Prince's Pine, Chimaphila umhellata 



Fig. 96. — Bluebell, Campanula rotundijolia . 



Fig. 97. — Puccoon, Lithospermum canescens . 



Fig. 98. — Horsemint, Monarda punctata 



Fig. 99. — St. John's-wort, Hypericum Kalmianum . . 



Fig. 100. — Bell wort. Uvular ia grandiflora 



Fig. ioi. — Star Flower, Trientalis americana, and False Lily-of-the 



Valley, Maianthemmn canadense 

 Fig. 102. — Blue-eyed Grass, Sisyrinchium angustijolium 

 Fig. 103. — False Solomon's Seal, Smilacma racemosa . 

 Fig. 104. — Staghorn Sumac, Rhus iyphina 

 Fig. 105. — Dwarf Sumac, R. copallina .... 

 Fig. 106. — Aromatic Sumac, R. canadensis 

 Fig. 107. — Poison Sumac, R. Vernix .... 

 Fig. 108. — Bittersweet, Celastrus scandens ^ . 

 Fig. 109. — The Frost Grape, Vitis cordijolia . 

 Fig. 1 10. — The Summer Grape, V. aestivalis . . ' . 

 Fig. III. — The River-Bank Grape, V. vulpinus 

 Fig. 112. — Sassafras, Sassafras variifolium 

 Fig. 113. — Voison Ivy, Rhus Toxicodendron . 

 Fig. 114. — Shadbush, Service Bush, or June Berry, Amelanchier 



canadensis 



Fig. 115. — Pin Cherry, Pruniis pennsylvanica 



Fig. 116. — Chokecherry, P. virginiana .... 



Fig. 117. — Huckleberry, Gaylussacia baccata . 



Fig. 118. — Bush Honeysuckle, Diervilla Lonicera . 



Fig. 119. — SpiderwoTt, Tradescantia virginica 



Fig. 120. — Bastard Toadflax, Comandra umbellata 



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