X ILLUSTRATIONS. 



I'a#e. 



Fig. 56. Cypress stumps on the margin of Lake Drummond 340 



57. Salt marsh covered with Spartina slrieta maritima 3til 



58. Spartina stricta maritima . . 362 



59. Marram grass (Ammophila arenaria) on the dunes near Cape 



Henry, Va 369 



60. Sea oats (Uuiola paniculata) on the dunes near Cape Henry, Va_- 369 



61 . Iva imbricata on the dunes near Cape Henry, Va 370 



62. Meadow-like growth of Ammophila near Oceanview, Va 371 



63. Ammophila with Myrica carolinensis at Cape Henry, Va.. 371 



64. Thicket of 'myrtle" (Myrica carolinensis) on a dune at Cape 



Henry, Va 372 



65. Live oak (Quereus virginiana) on the middle dunes near Ocean- 



view, Va . 373 



66. PinuH taeda among the sand dunes near Oceanview, Va 374 



67. Panicum amarum among the middle dunes near Cape Henry ... ... 375 



68. Panicum amarum among the dunes near Oceanview. Va 376 



(>9. Hudson ia tomentosa on the dunes near Virginia Beach (Pinna taeda 



in background) . . 377 



70. Strand pine woods at Oceanview, Va 380 



71. Innermost dunes encroaching on the strand pine woods (of Pimm 



taeda) near Virginia Beach, Va. . ... .. 381 



72. Diodia teres on the middle dunes near Oceanview, Va., illustrating 



the radiant form . . 385 



73. Pinus taeda along the Dismal Swamp Canal 397 



74. Sweet gum (Liquidambar styraeiflua) near Norfolk, Va 398 



75. Sweet gum (Liquidambar styraeiflua) at Wallaceton, Va 399 



76. Eupatorium capillifolium on roadside near Wallaceton. Va 409 



77. Erianthus eontortus along a ditch near Portsmouth. Va. 410 



78. Rattan (Berchemia scandens) climbing on trees in the Black Gum 



Swamp . . _ _ . . . 420 



7ft. Mistletoe ( Phoradendron flavescens) on a red maple 422 



80. Forest of " juniper" (Chamaecypaiis thyoides) on the margin of 



the Dismal Swamp _ . 424 



81. Trunk of ' ' juniper " ( Chamaecyparis thyoides) 435 



82. Big cane (Arundinaria macrosperma ) 427 



83. Erianthus saccharoides on the eastern margin of the Dismal Swamp 438 



84. Cyperus erythrorhizos along the Dismal Swamp Canal . 441 



85. Mouth of main drainage ditch emptying into the Dismal Swamp 



Canal, Wallaceton, Va.._ _. 481 



86. Smilax lauri folia, leaf in cross section % ... 486 



87. Hypericum piloaum, leaf .. 490 



88. Lechea maritima, falsely bicellular hair from leaf 497 



89. LeucothoU axillaris, lower surface of leaf showing stoniata 499 



90. Galium hispidulum, leaf 507 



MAPS. 



Plat e I. Map of northern Idaho Frontispiece. 



Map 1. Dismal Swamp district of Virginia and North Carolina 550 



2. Norfolk Peninsula, showing fresh and salt water marshes, sand 



dunes, and uplands ... 550 



o 



