26 MICHIGAN ACADEMY OF SCIENCE. ''■ 



Chaetochloa glauca (L.) Scribn. Yellow Fox-tail. a 



(Setaria glauca Beauv.) 1 



Chaetochloa viridis (L.) Scribn. Green Fox-tail. ! 



(Setaria viridis Beauv.) !, 



Chenopodium album L. Lamb's Quarters. Pigweed. j 



Chenopedium glaucum L. Oak-leaved Goosefoot. i 



Chrysanthemum Leucanthemum L. White Daisy. Ox-Eye Daisy. ] 



Cichorium Intybus L. Chicory. i 



Conium maculatum L. Poison Hemlock. .■< 



Convolvulus arvensis L. Bindweed. ; 



Cynoglossum officinale L. Hound's-Tongue. « ■■; 



Datura Stramonium L. Stramonium. Thorn-apple. \ 

 Datura Tatula L. Purple Thorn-apple. 

 Daucus Carota L. Carrot. 



Diplotaxis muralis (L.) DC. Sand Rocket. \ 



[Sisymbrium inurale L.) . 



Dipsacus sylvestris Huds. Wild Teasel. i 



Echinops sphaerocephalus L. j 



Eragrostis- major Host. Stink grass. ] 



Euphorbia Cyparissias L. Cypress Spurge. [ 



Hypericum perforatum L. St. John's wort. " ! 



Inula Helenium L. Elecampane. j 



Lactuca Scariola L. Prickly Lettuce. ' 



Lappula Lappula (L.) Karst. Stickseed. \ 



(Echinospermum Lappula Lehm.) j 



Leonurus Cardiaca L. Motherwort. j 



Lepidium apetalum Willd. Apetalous Pepper-grass. i 



(Lepidiuvi intermediuvi A. Gray.) t; 



Lepidium sativum L. Pepper-grass. ' 



Linaria Linaria (L.) Karst. Butter-and-eggs. Toad-flax. I 

 {Linaria vulgaris Mill.) 



Lithospermum arvense L. Red root. Corn Gromwell. Wheat Thief. 



Malva rotundifolia L. Common Mallow. ' 

 Medicago lupulina L. Black Medic. 



Melilotus alba Desf. White Melilot. Sweet Clover. ' 



Nepeta Cataria L. Catnep. Catmint. ' 



Panicum capillare L. Witch Grass. - 

 Panicum Crusgalli L. Barnj^ard-Grass. 



Plantago lanceoata L. Ribgrass. English Plantain. ; 



Polygonum Convolvulus L. Black Bindweed. ] 



Portulaca oleracea L. Purslane. . ; 



Ranunculus acris L. Buttercup. : 



Ranunculus bulbosus L. Buttercup. t. 



Ranunculus repens L. Creeping Buttercup. < 



Roripa sylvestris (L.) Bess. Yellow Water-cress. j 



(.Nasturtium sylvestre R. Br.) | 



Rumex Acetosella L. Field or Sheep Sorrel. ] 



Rumex crispus L. Curled Dock. . s 

 Rumex obtusifolius L. Bitter Dock. 



Salsola Tragus L. Russian Thistle. ' 



Saponaria officinalis L. Soapwort. Bouncing Bet. i 



Silene noctiflora L. Night-flowering Catchfly. I 



Silene vulgaris (Moench) Garcke. Bladder Campion. j 



(Silene Cucubalus Wibel.) i 



Sisymbrium altissimum L. Tall Sisymbrium. i 



Sisymbrium officinale (L.) Scop. Hedge Mustard. ] 



Sonchus arvensis L. Sow-Thistle. i 



Sonchus asper (L.) All. Spiny-leaved Sow-Thistle. 1 



Sonchus oleraceus L. Snow-Thistle. ' 



Syntherisma linearis (Krock.) Nash. Small Grab-grass. ' 



(Panicum glabrum Gaud.) ] 



Syntherisma sanguinalis (L.) Dulac. Crab-grass. I 



(Panicum sanguinale L. 1 



Tanacetum vulgare L. Common Tansy. i 



Taraxacum Taraxacum (L.) Karst. Dandelion. i 



