71 



Sand Bar Willow 21 



Cherry 37 



Spurrey 27 



Sandbur 8 



Sandwort 27 



Sanguinaria 31 



Sang:uisorba 36 



Sanicle 46 



Sanicula 46 



Sap on aria 28 



Sarracenia 33 



Sassafras 31 



Satureja 53 



Savory 53 



Saxifrag-a 33 



Saxifrage 33 



Scarlet Oak 23 



Painted Cup 56 



Scheuchzeria 7 



Sciiwalbea 55 



Scirpus 12 



Scleranthus 27 



Scleria 13 



Scorpion-grass 52 



Scotch Pine 5 



Scouring Rush 3 



Scrophularia 55 



Scutellaria 53 



Sedge 13 



Sedum 33 



Seedbox 45 



Selaginella 3 



Self-heal 53 



Sempervirum 33 



Senecio 03 



Senna 37 



Sensitive Fern 2 



Sericocarpus 61 



Setaria 8 



Shad Bush 34 

 Shagbark Hick'y 22 



Sheep Laurel 48 



Sorrel 25 



Sheep's Fescue 11 

 Shepn'rd's Purse 31 



Shield Fern i 



Shin Leaf 47 



Shining Willow 21 

 Showy Lady's 



Slipper 19 



Orchis J 9 

 Shrubby Cinque- 

 foil 35 

 Sickle-pod 32 

 Sicyos 59 

 Silene 28 

 Silky Cornel 47 



Willow 22 



Silver Maple 41 

 Silvery Cinquef'l 35 



Sisymbrium ii, 32 



Sisyrinchium ig 



Slum 46 



Skullcap S3 



Skunk Cabbage 10 



Currant 34 



Sleepy Catchfly 28 

 Slender Gerardia 56 



Slippery Elm 24 



Slough Grass 10 



Small Cranberry 49 



Bugloss 52 



Small Solomon's 



Seal 

 Smaller Bladder- 

 wort 



Yellow Lady's 

 Slipper 

 Small-flowered 



Crowfoot 

 Smartweed 

 Smilacina 

 S mi lax 

 Smooth Alder 



False Foxgl'e 



Gooseberry 



Sumac 



Winterberry 

 Snowberry 

 Solanum 

 Solidago 

 Solomon's Seal 

 Sonchus 

 Sorbaria 

 Sow Thistle 

 Sparganium 

 Spar tin a 

 Spearmint 

 Speckled Alder 

 Specularla 

 Speedwell 

 Sphenopholis 

 Spergula 

 Spergularia 

 Spice Bush 

 Spiderwort 

 Spiked Loose- 

 strife 

 Spikenard 

 Spike Rush 

 Spiraea 

 Spiranthes 

 Spirodela 

 Spleenwort 

 Sporobolus g 



Spotted Cowbane 46 



Touch-me-not 42 



Wintergreen 

 Spreading Dog- 

 bane 

 Spring Beauty 



Cress 



Vetch 

 Spring-leaved 



Sow Thistle 64 

 Spruce 5 



Spurge 40 



Spurred Gentian 50 

 Squaw-root 56 



Squirrel Corn 31 

 Stachys 53 



Staff Tree 41 



Staghorn Sumac 40 

 Staphylea 41 



Star Flower 50 



Grass 18 



Thistle 64 



Star of Bethle'm 18 

 Starry Campion 28 

 Steironema 49 



Stellaria 27 



Stemless Lady's 



Slipper 

 Stenophyllus 



47 



28 

 38 



Stickseed 

 Stiff Water Crow- 

 foot 

 St, John's-wort 

 Stonecrop 

 Stramonium 

 Strawberry 



Blite 



Tomato 

 Streptopus 

 Striped Maple 

 Struthiopteris 

 Sugarberry 

 Sugar Maple 

 Sumac 

 Sundew 

 Sun drops 

 Sunflower 

 Swamp But'rcup 29- 



2g' 

 43 

 33 



54 



26' 

 54 

 IS 

 41 



2- 

 24 

 41 

 40- 



33 



45 



Dock 



Loosestrife 



Milkweed 



Saxifrage 



Thistle 



White Oak 

 Sweet Birch 

 Sweetbrier 



Cicely 



Clover 



Coltsfoot 



Fern 



?:^^ 



Gale 



Golden-rod 

 Pepperbush 

 Vernal Grass 

 Viburnum 5i 



WiUiam Catchfl; 



25 

 44 

 51 



If 

 23 

 23. 



t 

 53, 

 22 

 16 

 22 

 60. 



4?- 



19 



Woodruff 57 



Switch Grass 7 

 Sycamore 34- 



Symphoricarpos 58 

 Symphytum 52 



Symplocarpus 16 



Taenidia 46' 



Tall Buttercup 23' 



Gypsophyll 



Meadow Kv 



Oat Grass 



Red Top 

 Tanacetum 

 Tansy 

 Tartarian Honey 



suckle 

 Taraxacum 

 Taxus 

 Teaberry 

 Teasel 

 Tepfarosia 

 Teucrium 

 Thalictrum 

 Thaspium 

 Thimbleberry 

 Thin Grass 

 Thistle 

 Thorny Amaranth 



25> 



29- 



6S 



64 



5 

 49. 



59' 

 38 

 52 

 29 

 46 

 36' 



