IOWA ACADEMY OF SCIENCE 
79 
Ribes rotundifolium, (36b) 
Roripa, see Radicula 
Rosa blanda (36a) 
Rosa pratincola, 141, 182 
Rubus occidentalis, 102 
Rubus sp., 183 
Rudbeckia laciniata, 77, 122, 197, 240 
S 
Sagittaria latifolia, 113, 168 
Salix amygdaloides, 170 
Salix fluvitialis, see S. longifolia 
Salix liumilis, 47, 170 
Salix interior, 170 
Salix longifolia, 170 
Salix lucida, 64, 170 
Salix sp., (47) 
Salomonia, see Polygonatum 
Sambucus canadensis, (44a) 
Sanicula sp., 167 
Scirpus atrovirens, 202 
Scrophularia marylandica, 27, 103 
Scutellaria lateriflora, (41), 104, 
Setaria glauca, 10, 155 
Setaria viridis, 10 
Silene stellata, 105 
Silphium laciniatum, 198 
Silphium perfoliatum, 234 
Sium cicutaefolium, 142 
Smilicana racemosa, 106 
Solidago canadensis, (40), 169 
Solidago flexicaulis, see S. latifolia 
Solidago graminifolia, 65 
Solidago latifolia, 65, 169, 207 
Solidago rigida, (40) 
Solidago serotina, 169, 207 
Solidago serotina gigantea, (40) 
Solidago ulmifolia, 207 
Sonchus oleraceus, (36) 
Sorghastrum avenaceum, see S. nutans 
Sorghastrum nutans, 56 
Spartina cynosuroides, 189, 215 
Stachys palustris, 41 
Stieronema ciliatum, 88 
Syntberisma, see Digitaria 
Syringa vulgaris, 43 
T 
Taraxacum officinale, 36, 123, 236 
Taraxacum Taraxacum, see T. officina- 
lis 
Teucrum canadensis, 140 
Tilia americana, (49a) 
Trifolium pratense, 145, 147 
Trifolium repens, 147, 199 
Triosetum perfoliatum, 148 
U 
Ulmus americana, (43), 49, (50), 76 
Uromyces Silphii, 82 
Urtica gracilis, 237 
Urticastum, see Laportea 
Uvularia grandiflora, 72 
V 
Vagnera, see Smilicana 
Verbena bracteosa, 40 
Verbena hastata, 40 
Verbena stricta, 40 
Verbena urticasfolia, 40 
Vernonia altissima, 97 
"'^ernonia maxima, see V. altissima 
Veronica virginica, 36 
Viburnum lentago, 43, 144 
Vicia americana, 29, 190, 193 
Viola papilionacea, 238 
Viola pubescens, 81, 238 
Viola scabriuscula, 238 
Viola sp., 78, 135 
Vitis cordifolia, (48) 
Vitis vulpina, 15, 48, 61 
Vitis sp. (48) 
W 
Washingtonia, see Usmorhiza 
X 
Xanthoxlylum americanum, 50, 244 
Z 
Zea Mays, 235 
