-110- 



PRUNUS 66 



PTERIDIUM .... 28 



PUCCINELLIA ... 38 



Pulse Family ... 70 



Purple Chokeberry 67 



Purple Loosestrife 79 



PYRUS 67 



33 



SENECIO 100 



Sensitive Fern . . 28 



SETARIA 38 



Shadbush 64 



Shagbark Hickory . 50 



Sheep Sorrel ... 54 



Speedwell . . . . 

 SPERGULARIA . . . 

 Spiderwort . . . . 

 Spiderwort Family 

 Spike Rush . . . . 

 Spike-Grass 



91 

 59 

 44 

 44 

 42 

 34 



Spiny-leaved Sow-Thistle 101 



SPIRAEA 70 



SPOROBOLUS .... 39 

 Spotted Cowbane . 81 

 Spreading Dogbane 86 

 Spurge Family . . 74 

 Squirrel-Tail . . 36 

 St. John's-wort . 77-78 

 St. John's-wort Family 77 

 Staff-tree Family 75 

 Staghorn Sumac . . 74 

 Star Flower ... 84 

 Starry Spikenard . 47 

 Steeple-Bush ... 70 

 STELLARIA .... 60 

 Stick-tight ... 95 

 Stinging Nettle . 52 

 Stinking Willie . 100 

 Stitchwort .... 60 

 Storax Family . . 84 

 Strawberry .... 65 

 STYRACACEAE ... 84 



STYRAX 85 



SUAEDA 56 



Sugar Maple ... 76 



Sundew 64 



Sundew Family . . 64 

 Sunflower .... 97 

 Swamp Pink .... 48 

 Swamp-candles . . 84 

 Sweet Flag .... 43 

 Sweet Gale .... 50 

 Sweet Grass ... 36 

 Sweet-scented Bedstraw 92 



Switch Grass 

 Sword-grass 

 SYRINGA . . 



37 

 42 

 85 



Tall Cinquefoil . 65 

 Tall Meadow-Rue . 61 

 TANACETUM .... 101 

 TARAXACUM .... 101 



TEUCRIUM 89 



THALICTRUM .... 61 

 THELYPTERIS ... 28 

 Thimbleweed ... 60 



THLASPI 63 



Three-leaved Cinquefoil 66 

 Thyme-leaved Sandwort 57 

 Tiger-Lily .... 46 



TILIA 77 



TILIACEAE .... 77 



Timothy 37 



Toad Rush . . . .45 

 Touch-me-not ... 76 

 Touch-me-not Family 76 



TOXICODENDRON 

 TRADESCANTIA . 

 TRAGOPOGON . . 

 Tree-of -Heaven 

 Trembling Aspen 

 TRICHOSTEMA 

 TRIENTALIS . 

 TRIFOLIUM . 

 TRIGLOCHIN , 

 Tumble Mustard 

 Tumbleweed . 

 TYPHA . . . 

 TYPHACEAE , 



ULMACEAE . . 

 ULMUS . . . 

 UMBELLI FERAE 

 Upland Bent 

 URTICA . . . 

 URTICACEAE . 



. 75 



. 44 



. 101 



. 73 



. 49 



. 89 



. 84 



. 72 



. 31 



. 63 



. 57 



. 29 



. 29 



52 

 52 

 81 

 32 

 52 

 52 



VACCINIUM .... 83 



VERBASCUM .... 90 



VERBENA 87 



VERBENACEAE ... 87 



VERONICA 90 



Vervain Family . . 87 



Vetch 72 



VIBURNUM 93 



VICIA 72 



Vine Family ... 76 



VIOLA 78 



VIOLACEAE .... 78 



Violet 78 



Violet Family . . 78 



Virgin' s-bower ^ . 60 



Virginia Creeper . 77 



VITACEAE 76 



VITIS 77 



VULPIA 39 



Walnut Family . . 50 

 Water Milfoil . . 80 

 Water Milfoil Family 80 

 Water Purslane . . 80 

 Water-Hemp .... 56 

 Wa ter-horehound . 88 

 Water-Plantain Family 31 

 Wax-Myrtle Family 50 

 Weeping Willow . . 49 

 White Campion 

 White Clover 

 White Daisy 

 White Dock . 

 White Pine . 

 White Poplar 

 White Sweet Clover 

 White Willow . . . 

 Whorled Loosestrife 



Widgeon Grass 



Wild Carrot . , 



Wild Cranesbill 



Wild Lettuce . . 



Wild Oats . . , 



Wild Orange-red Wood-Lily 46 



58 

 72 

 96 

 55 

 29 

 49 



71 

 49 



84 

 30 

 81 

 73 

 99 

 33 



Wild Radish 

 Wild Raisin 

 Wild Rice 



63 

 93 

 39 



Wild Rye 35 



Wild Sarsaparilla 81 



Willow Family . . 49 



Willow Herb . . . 79-80 



Winterberry ... 75 



Witch Grass ... 31 



Wood-Sage .... 89 



Wood-Sorrel ... 73 

 Wood-sorrel Family 73 



Wool-grass .... 42 



Wormwood 94 



Yarrow 93 



Yellow Clover . . 72 



Yellow Cress ... 63 



Yellow Day Lily . 46 



Yellow Dock ... 54 



Yellow Iris ... 48 

 Yellow Sweet Clover 71 



Yellow Thistle . . 96 



Yellow-eyed Grass 43 

 Yellow-Eyed Grass Family 



YUCCA 47 



XANTHIUM 102 



XYRIDACEAE .... 43 



XYRIS 43 



43 



ZIZANIA . . 

 ZOSTERACEAE 



39 

 30 



