IOWA ACADEMY OP SCIENCE 
Masadenia, see Caccalia 
Malva rotiindifolia, 96 
Meibom ia, see Desmodium 
Melampsora Bigelowwi, 82, 153 
Melampsora Medusae, 82, 153 
Melilotus alba, 131 
Menispermium canadensis, 137, 164 
Mentha canadensis, 41, 71, 221 
Micrampelis, see Echinocystis 
Monarda fistulosa, 4, 221 
Muhlen'bergia Schreberi, 222 
Muhlenbergia diffusa, see M. Schreberi 
Muhlenbergia mexicana, 146 
Musca domestica, 5 
N 
Nabulus, see Prenanthes 
Nemophylla microcalyx, 241 
Nymph 80 a ad vena, 73 
O 
Oenothera biennis, 3, 18, (39), 98, 224 
Onagra, see Oenothera 
Osmorhiza Claytoni, 226 
Osmorhiza longistylis, 226 
Ostrya virginica, 34, 43 
Oxybaphus nyctagineus, 80, 138 
Oxalis stricta, 46 
P 
Panax quinquefolia, 116 
Panicum capillare, 213 
Parietaria pennsylvanica, 40, 99 
Parthenocissus, see psedera 
Phlox Drummondri, (40) 
Phlox paniculata, 227 
Phryma leptostachya, 95, 225 
Physalis pruniosa, 162 
Plantago major, 17, 40 
Plantago Rugelli, 40 
Poa pratensis, 42, 214 
Podophyllum, peltatum, 100, 229 
Podosphaera Oxycanthae, 79 
Polemonium reptans, 243 
Polygonatum biflorum, 220 
Polygonum amphibium, 230 
Polygonum aviculare, 39, 117 
Polygonum erectum, 39 
Polygonum Hydropiper, 139 
Polygonum lepathifolium, 157, 158 
Polygonum pennsylvanicum, 157 
Polymnia canadensis, 24u 
Polystictus, see Coriolus 
Populus deltoides, 172 
Populus tremuloides, 33 
Portulaca oleracea, 8 
Potentilla canadensis, 184 
Potentilla monsepalensis, '26, 68, 121 
Prenanthes alba, 101 
Prunus americana, 31, 37, 59, 66, 179 
Primus avium, 37 
Prunus virginiana, 59, 118 
Prunus sp., (37) 
Psedera quinquefolia, 48, 61, 125 
Psedera quinquefolia hirsuta, 61, 125 
Puccinia Asparagi, 82 
Puccinia Caracis-asteris, 151 
Puccinia Eraxinata, 151 
Puccinia Menthse, 152 
Puccinia Opizii, 151 
Puccinia Peckii, 151 
Puccinia Phrymse, 151 
Pycnamthemum pilosum, 221 
Pyrola elliptica, 174, 176 
Pyrus iowensis, 60, 187 
Pyrus Malus, 38, 109, 187 
Q 
Quercus alba, 44 
Quercus palustris, 32 
Quercus rubra, 32, (44) 
Quercus velutina, 43, 44 
R 
Radicula Armoracia, 120 
Radicula palustris, 7 
Ranunculus abortivus, 39, 211 
Ranunculus recurvatus, 119 
Ranunculus septentrionalis, 119 
Ratbida, see Lepachys 
Rhus glabra, 35 
Rhus radicans, see R. Toxicodendron 
Rhus Toxicodendron, 107, 143, 178 
Ribes cynosbati, (36b), 200 
Ribes floridum, 36b, 200, 
Ribes gracile, 75, 200 
