354 



INDEX 



Sedge, Cyperus-like, 62 

 Dark-green, 65 

 Davis', 64 

 Dewey's, 70 

 Downy Green, 64 

 Drooping, 63 

 Drooping Wood, 65 

 Dry-spiked, 71 

 Eastern, 70 

 Emmon's, 67 

 Fescue, 71 

 Few-flowered, 60 

 Few-fruited, 66 

 Few-seeded, 61 

 Fibrous-rooted, 67 

 Field, 66 

 Fox, 69 

 Foxtail, 69 

 Frank's, 62 

 Fringed, 64 

 Glaucescent, 65 

 Golden-fruited, 67 

 Goodenough's, 63 

 Graceful, 64 

 Gray, 65 

 Gray's, 60 

 Green, 65 



Greenish White, 71 

 Hairy, 63 

 Hairy-fruited, 62 

 Hart Wright's, 61 

 Hay, 71 

 Hayden's, 63 

 Hirsute, 64 

 Hitchcock's, 66 

 Hop, 61 

 Hop-like, 61 

 Inland, 70 

 James', 68 

 Lesser Panicled, 68 

 Lesser Prickly, 69 

 Little Prickly, 70 

 Long, 60 

 Long-beaked, 64 

 Long-stalked, 67 

 Loose-flowered, 66 

 Magellan, 64 

 Marsh Straw, 71 

 Meadow, 65 

 Mead's, 66 

 Mud, 63 



Muhlenberg's, 70 

 Narrow-leaved, 65 

 Necklace, 61 

 Nodding, 64 

 Northern, 68 

 Oval-headed, 69 

 Pale, 66 



Pennsylvania, 67 

 Plantain-leaved, 67 

 Pointed Broom, 71 

 Porcupine, 62 

 Pubescent, 68 

 Redowsky's, 68 

 Reflexed, 69 

 Retrorse, 61 

 Ribbed, 64 

 River-bank, 62 



Sedge, Rough, 62 



Sallow, 61 



Sartweil's, 69 



Schweinitz's, 62 



Short's, 62 



Shiiver's, 65 



Silvery, 70 



Slender, 63 



Slender-stalked, 65 



Slender Wood, 66 



Soft Fox, 68 



Soft-leaved, 69 



Spreading, 67 



Squarrose, 62 



Stellate, 69 



Straw, 71 



Striate-fruited, 66 



Summer, 64 



Thicket, 67 



Thin-leaved, 69 



Three-fruited, 70 



Tuckerman's, 61 



Tussock, 63 



Twisted, 63 



TJmbel-like, 68 



Variable, 66 



Velvet, 62 



Water, 63 



White Bear, 67 



Whitish, 68 



Willdenow's, 68 



Wood's, 66 



Woolly, 63 



Yellow, 65 



Yellow-fruited, 69 



Yellowish, 60 

 Sedge Family, 42 

 Seed-box, 222 

 Self-heal, 267 

 Senna, American, 180 



Family, 179 



Low, 180 



Wild, 180 

 Sensitive Plant, Wild, 179 

 Sensitive Pea, Large- 

 flowered, 179 

 Service-berry, 175 

 Sesban, Long-podded, 



185 

 Shag-bark, Big, 103 

 Shad-bush, 175 

 Sheep-berry, 294 

 Shepherd's Purse, 148 

 Shin-leaf, 236 

 Shooting Star, 245 

 Sickle-pod, 155 

 Sida, Prickly, 210 

 Side-saddle Flower, 157 

 Silkweed, 251 

 Silver-leaf, 206 

 Silver-weed, 169 

 Sisymbrium, Tall, 150 

 Skullcap, Downy, 265 



Hairy, 265 



Heart-leaved, 265 



Hyssop, 265 



Larger, 265 



Mad-dog, 265 



Skullcap, Marsh, 266 

 Rock, 265 

 Showy, 265 

 Small, 266 

 Veined, 266 

 Sloe, 178, 294 

 Smart-weed, 117 



Water, 117 

 Smilax Family, 87 



Halberd-leaved, 88 

 Smoke-tree, American, 

 203 

 Wild, 203 

 Snake-head, 280 

 Snakeroot, Black, 135 

 Seneca,;i97 

 Virginia, 113 

 Black, 228 

 Clustered, 228 

 Long-fruited, 229 

 Short-styled, 228 

 Smaller White, 314 

 White, 314 

 Sneezeweed, 335 



Purple Head, 336 

 Snowberry, 295 

 Creeping, 242 

 Low, 295 

 Soapberry Family, 206 

 Soapwort, 127 

 Soft-grass, Meadow, 29 

 Solomon's Seal, Hairy,86 

 Smooth, 86 

 Star-floweredi 85 

 Three-leaved, 85 

 Two-leaved, 85 

 Sorrel, 113 

 Field, 113 

 Sheep, 113 

 Sorrel-tree, 240 

 Sour Gum, 235 

 Sour-wood, 240 

 Southernwood, 337 

 Sow-thistle, Annual, 303 

 Com, 303 

 Spiny, 303 

 Spanish Needles, 335 

 Spear-grass, Flexuous, 

 36 

 Low, 35 



Short-leaved, 36 

 Sylvan, 36 

 Weak, 35 

 Spearmint, 273 

 Spearwort, Creeping, 140 

 Low, 140 



Water Plantain, 141 

 Speedwell, Buxbaum's, 

 283 

 Common, 283 

 Com, 283 

 Field, 283 

 Garden, 283 

 Germander, 282 

 Ivy-leaved, 283 

 Marsh, 282 

 Purslane, 283 

 Skullcap, 282 



