392 IOWA ACADEMY OF SCIENCE 



Cocklebur 88-89 Groundsel 102 



Colt's-foot 100 Hawkweed, Orange 117 



Corn Chamomile 98 Heal-all 71 



Corn Cockle 31 Helianthus divaricatus 92 



Corn Flower 106 Heliopsis helianthoides 90 



Corn Gromwell 67 Herd's Grass 6 



Corn Spurry 27 Hieracium aurantiacum 117 



Crab Grass 1 Hieracium scabrum 118 



Crowfoot, Small-flowered 36 Hog Peanut 52 



Crowfoot, Tall 37 Hogweed 87 



Curled Dock 13 Horseweed 84 and 114 



Cuscuta arvensis 65 Hypericum perforatum 58 



Cuscuta epithymum 64 ilmpatiens biflora 54 



Cuscuta Gronovii 63 Indian Mallow 55 



Daisy Fleabane 83 Inula Helenium 85 



Daisy, White 99 Ivy, Poison 53 



Daisy, Yellow 9.1 1 Jimson-weed 73 



Dandelion 110 Joe-Pye Weed 81 



Datura Stramonium 73 Kentucky Blue Grass 9 



Daucus Carota 61 Knot Grass 16 



Digitaria sanguinalis 1 Knot-weed, Common 16 



Dipsacus sylvestris 80 Knot-weed, Virginia 18 



Devil's Paint-brush 117 Lactuca canadensis 114 



Dodder, Clover 64 Lactuca scariola 113 



Dodder, Field 65 Lactuca spicata 115 



Dodder, Gronovius 63 Lady's Thumb 17 



Dog-fennel 97 Lamb's-quarters 22 



Echinochloa cruss-galli 3 Lappula virginiana 66 



Elecampane 85 Laportea canadensis 12 



Eragrostis megastachya 8 Lepidium ruderale 38 



Erechtites hieracifolia 101 Leonurus Cardiaca 72 



Erigeron annuus 83 Lettuce, Common Wild 114 



Erigeron canadensis 84 Lettuce, Prickly 113 



Eupatorium perfoliatum 82 Lettuce, White 116 



Eupatorium purpureum 81 Linaria vulgaris 76 



Evening Primrose 59 Lithospermum arvense 67 



Field Sorrel 15 Lucerne 50 



Finger Grass 1 Lychnis alba 32 



Fireweed 101 Mallow, Common 56 



Five-finger 44 Mallow, Indian 55 



Fleabane, Daisy 83 Mallow, Musk 57 



Fowl Meadow Grass 10 Malva rotundifolia 56 



Foxtail, Green 5 Malva moschata 57 



Foxtail, Yellow 4 Mayweed 97 



Galinsoga parviflora 95 Medicago lupulina 51 



Glyceria nervata 10 Medicago sativa 50 



Goosefoot, Maple-leaved 21 Medick, Black 51 



Gromwell, Corn 67 Melilot, White 49 



