A SEED KEY TO COMMON WEEDS J91 



INDEX. 



Abutilon Theophrasti 55 Buckwheat. Climbing False... 20 



Achillea Millefolium 96 Buckwheat. Wild 19 



Agrimonia striata 45 Bull Thistle 104 



Agrimony, Tall 45 Burdock 103 



Agrostemma Githago 31 Butter and Eggs 76 



Agrostis alba 7 Buttercup. Bitter 37 



Alfalfa 50 Buttercup, Small-flowered .... 36 



Alsike 4S Buttercup, Tall 37 



Amaranthus graecizans 26 Butterweed S4 



Amaranthus hybridus 25 Campion, White 32 



Amaranthus retroflexus 24 Canada Blue Grass 9a 



Ambrosia artemisiifolia S7 Canada Thistle 105 



Ambrosia trifida 86 Capsella Bursa-pastoris 39 



Amphicarpa monoica 52 Caraway 60 



Anthemis arvensis 95 Carpenter-weed 71 



Anthemis Cotula 97 Carrot. Wild 61 



Arabis laevigata 43 Carum Carvi 60 



Arctium minus 163 Catchfiy. Night-flowering 33 



Arenaria serpyllifolia 25 Cat Mint 7 ' 



Asclepias syriaca 62 Catnip 70 



Atriplex patula 23 Centaurea Cyanus 



Barbarea vulgaris 42 C-erastium viscosum 30 



Barnyard Grass 3 Chicory 107 



Batchelors' Button 106 Chamomile. Corn 9S 



Beard Grass 10 Cheat 11 



Beggar's Lice 66 Cheeses 56 



Beggar's Ticks 93 Chenopodium album 22 



Bidens cernua 94 Chenopodium hybridum 21 



Bidens frondosa 93 Chess 11 



Bindweed. Black 19 Chiekweed. Common 29 



Bitter Dock 14 Chickweed. Mouse-eared 30 



Bitterweed S7 Chrysanthemum Leucanthe- 



Black-eyed Susan 91 mum 99 



Black Medick 51 Cinquefoil 44 



Blue Bottle 106 Cirsium arvense 105 



Blue Sailors 107 Cirsium lanceolatum 104 



Boneset S2 Cichorium Intybus 107 



Bottle-grass 5 Clotbur S> 



Bouncing Bet 34 Clover. Alsike 4> 



Brassica nigra 40 Clover. Red 46 



Broad-leaved Dock 14 Clover. Sweet 49 



Bronius secalinus 11 Cockle. Corn 31 



Buckhorn 79 Clover. White 47 



