xvi LIST OF ILLUSTRATIONS 



PAGE 



FIG. 82. Sand Thistle, Cirsium Pitcheri 118 



FIG. 83. Fore-dune Association 119 



FIG. 84. Long-leaved Sand Reed, Calamovilfa longifolia . . .120 



FIG. 85. Marram, Ammophila arenaria 120 



FIG. 86. Sand Cherry, Prunus pumila 121 



FIG. 87. Furry Willow, Salix syrticola 122 



FIG. 88. Cottonwood Zone 122 



FIG. 89. Red-osier Dogwood on Steep Side of Advancing Dune . 123 



FIG. 90. The Pine Association . 124 



FIG. 91. Bearberry, Arclostaphylos Uva-ursi . . . . . 125 



FIG. 92. Arbor vitae, Thuja occidentalis 126 



FIG. 93. Shinleaf, Pyr old elliptica 126 



FIG. 94. Checkerberry, Gaultheria procumbens 126 



FIG. 95. Prince's Pine, Chimaphila umbellata 126 



FIG. 96. Bluebell, Campanula rotundifolia 126 



FIG. 97. Puccoon, Lithospermum canescens 126 



FIG. 98. Horsemint, Monarda punctata 126 



FIG. 99. St. John's- wort, Hypericum Kalmianum . . . .126 



FIG. 100. Bellwort, Uvularia grandiflora 126 



FIG. 101. Star Flower, Trientalis americana, and False Lily-of-the- 



Valley, Maianthemum canadense 127 



FIG. 102. Blue-eyed Grass, Sisyrinchium angustifolium . . .128 



FIG. 103. False Solomon's Seal, Smilacina racemosa .... 128 



FIG. 104. Staghorn Sumac, Rhus typhina 131 



FIG. 105. Dwarf Sumac, R. copallina 131 



FIG. 106. Aromatic Sumac, R. canadensis 131 



FIG. 107. Poison Sumac, R. Vernix 131 



FIG. 108. Bittersweet, Celastrus scandens 131 



FIG. 109. The Frost Grape, Vitis cordifolia 131 



FIG. no. The Summer Grape, V. aestivalis 131 



FIG. in. The River-Bank Grape, V. vulpinus 131 



FIG. 112. Sassafras, Sassafras variifolium 131 



FIG. 113. Poison Ivy, Rhus Toxicodendron 132 



FIG. 114. Shadbush, Service Bush, or June Berry, Amelanchier 



canadensis 133 



FIG. 115. Pin Cherry, Prunus pennsyhanica 133 



FIG. 116. Chokecherry, P. mrginiana 133 



FIG. 117. Huckleberry, Gaylussacia baccala 133 



FIG. 1 1 8. Bush Honeysuckle, Diervilla Lonicera 133 



FIG. 119. Spiderwort, Tradescantia mrginica 133 



FIG. 1 20. Bastard Toadflax, Comandra umbellata .... 133 



