IOWA ACADEMY OP SCIENCE 
A 
Acer saccharinum, 63 
Acer saccharum (48a), (50) 
Acorus calamus, 196 
Aetheropogon curtipendula, see Bou- 
teloua 
Agrimonia gryposipala, 35, 173 
Agrimonia hirsuta, see A. gryposepala 
Agrimonia mollis, 26, 83, 173 
Agropyron repens, 55, 228 
Agrostis alba, 228 
Agrostis alba vulgaris, 228 
Alisma plantago-aquatica, 124 
Allonia, see Oxybaphus 
Amaranthus grUecizans, 6 
Amarantbus retroflexus, 6 
Ambrosia artaemisiaefolia, 9, 13, 40,- 
163 
Ambrosia psilistacliya, (40) 
Ambrosia trifida. 13, 40, 163, 166 
Ambrosia trifida integrifolia, 163 
Amelanchier canadensis, 51, 185 
Amorpha fruticosa, 181 
Ampbicarpa monoica, 1 
Ampbicarpa Pitcberi, 1 
Andropogon furcatus, 231 
Anemone canadensis, 16 
Anemone caroliniana, 16 
Anemone quinquefolia, 2, 16, 67, 161, 
179, 180 
Anemone virginiana, 201 
Apocynum androsaemifolium, 69 
Arisaena dracontium, 191 
Arisaema tripbyllum, 191 
Asclepias incarnata, 84 
Asclepias syriaca, 84, 130, 194 
Asparagus officinalis, 203 
Aster cordifolius, 40, 65, 85, 169, 204, 
205 
Aster laevis, (40) 
Aster paniculatus, 204 
Aster puniceus, 40, 169 
Aster sagittifolius (40) 
Aster salicifolius, 40 
Aster sp., (40), 169 
Astragalus canadensis, 28 (39) 
Astragalus carolinianus, see A. can- 
adensis 
Avena sativa, 233 
B 
Betula papyrifera, (50) 
Bidens comosa, 13 
Bidens frondosa, 13, (36), 163 
Bouteloua curtipendula, 56 
Brassica nigra, 7, 115 
C 
Cacalia reniformis, 91 
Campanula americana, 86, 239 
Campanulastrum americanum, see 
Campanula 
Cannabis sativa, 87 
Carduus, see Cirsium 
Carex cepbalopbora, 205 
Carex longirostris, 224 
Carex pennsylvanica, 159 
Carpinus caroliniana, (43) 
Castalia tuberosa, 165 
Caulopbyllum- tbaliictroides, 128 
Cencbrus tribuloides, 160 
Cbaetocbloa, see Setaria 
Cbenopodium album, 20, 22, 129 
Cbenopodium album virde, 129 
Cbenopodium bybridum, 20 
Cinna arundinacea, (42) 
Circaea lutetiola, 208 
Cirsium discolor, 40 
Claytonia virginica, 209 
Comandra pallida, 177, 231 
Comandra umbellata, 231 
Convolvulus sepium, 210 
Coriolus versicolor, 54 
Cornus alternifolia, 43, 89 
Cornus florida, (50) 
Coruus paniculata, 52 
Cornus stolinifer, 50 < 
Corylus americana, 43. (50), 70 
Crataegus punctata, 186 v 
Crataegus rotundifolia, 186 
Crataegus sp., (50) 
Cryptotaenia canadensis, 90 
Crystopteris fragilis, 175 
D 
Datura tatula, 150 
Dentaria laciniata, 25 
Deringia, see Cryptotaenia 
