INDEX 



Sicyos angulatus, 423, 460, 514. 

 Sida, 185. 



spinosa, 185, 480. 

 Silcnc acaulis, 307, 488, 511. 



antirrhina, 254, 474, 507. 



latifolia, 66, 474. 



noctiflora, 68, 474, 507. 



pennsylvanica, 256, 488, 500. 



stellata, 66, 488. 



virginica, 256, 488, 507. 

 Silkweed, 284, 328, 473. 

 Silky Cornel, 406, 464. 



Willow, 378. 

 Silver-rod, 134, 477. 

 Silver Weed, 174, 463, 507. 

 Silvery Cinquefoil, 172, 475. 

 Sisymbrium altissimum, 170. 



officinale, 170, 479, 501. 



Thalianum, 79, 475, 501. 

 Sisyrinchium angustifolium, 302, 

 471, 502. 



gramineum, 302, 471, 500. 

 Sium cicutaefolium, 104, 464. 

 Skullcap, 335, 491, 501, 505, 

 510. 



Hyssop 335, 467. 



Mad-dog 333, 459, 513. 



Marsh 335, 459. 



Small 335, 480. 

 Skunk Cabbage, 21, 461, 499. 



Currant, 385. 

 Sleepy Catchfly, 254, 474, 507. 

 Slender Aster, 364. 



Blue Flag, 371, 462, 502. 



Gerardia, 289, 477. 



Ladies' Tresses, 54, 462. 



Nettle, 25, 474. 



Northern Bog Orchis, 23. 



Purple Fringed Orchis, 246. 



Yellow Flax, 181, 490. 

 Slender-leaved Golden-rod, 222, 



468 480. 

 Sloe, 400, 475. 

 Small Bedstraw, 128, 465. 



Nettle, 25, 474. 



Purple Fringed Orchis, 246, 

 462. 



Skullcap, 335, 480. 



Solomon's Seal, 156, 487, 

 502. 



White Lady's Slipper, 462, 

 502. 



Smaller Green Dock, 27, 482. 



Whorlcd Pogonia, 160. 



Yellow Lady's Slipper, 159, 

 462, 502. 

 Small-flowered Crowfoot, 164, 458. 

 Smartweed, Common 27, 458, 



483. 



Water 58, 251. 

 Smilacina racemosa, 47, 471, 502. 



stellata, 47, 471, 502. 



trifolia, 48, 462, 502. 

 Smilax bona-nox, 377, 471. 



herbacea, 377, 458. 



hispida, 376. 



rotundifolia, 376, 471. 

 Smooth Alder, 381, 466. 



Aster, 360, 477. 



False Foxglove, 206. 



Gooseberry, 384, 489. 



Sumach, 389, 476. 



Winterberry, 402, 472. 

 Snakehead, 125, 473, 513. 

 Snakeroot, Black 73, 102, 495, 

 496, 512. 



Button 357. 



Large 357, 477. 



Seneca 90, 480. 



Virginia 305, 495. 



White 132, 496. 

 Snake's Mouth, 248. 

 Snapdragon, 125, 346, 374, 477, 



513- 

 Sneezeweed, Autumn 234, 460, 



517. 

 Snowberry, 421, 492, 510. 



Creeping 114, 464, 496, 505. 

 Snow-on- the- Mountain, 90, 484. 

 Soapwort, 256, 475. 

 Soft Willow Herb, 273. 

 Solanum carolinense, 344, 480. 



Dulcamara, 456, 473, 510. 



nigrum, 123, 485, 513. 

 Solidago arguta, 222, 492, 516. 



bicolor, 134, 477, 514, 516. 



caesia, 214, 492. 



canadensis, 218, 496, 514. 



Elliottii, 220, 465, 517. 



fistulosa, 218, 492. 



gigantea, 220. 



graminifolia, 222, 465, 516. 



hispida, 214, 477, 480, 514. 



juncea, 220, 492. 



547 



