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, Pyrola 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, M aianthemum canadense 127 



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



FIG. 103. False Solomon's Seal, Smilacina racemosa . , i-..- "> . -v. 128 



FIG. 104. Staghorn Sumac, Rhus typhina . '-\ >;;:" fj^.-V'- . 131 



FIG. 105. Dwarf Sumac, R. copallina . . ....'. ., . 131 



FIG. 106. Aromatic Sumac, R. canadensis . ,-. v. -. '. -. ;.;. . 131 



FIG. 107. Poison Sumac, R. Vernix ^ , f ;..,. ^ h ?;/-.-: : -*f f \* ,'/-. , I 3 I 



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, Amdanchier 



canadensis 133 



FIG. 115. Pin Cherry, Prunus pennsylvanica *..... 133 



FIG. 116. Chokecherry, P. virginiana 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 



