26 MICHIGAN ACADEMY OF SCIENCE. 



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

 (Setaria glauca Beauv.) 



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

 {Setaria viridis Beauv.) 



Chenopodium album L. Lamb's Quarters. Pigweed. 

 Chenopedium glaucum L. Oak-leaved Goosefoot. 

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

 Cichorium Intybus L. Chicory. 

 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 murale L.) 

 Dipsacus sylvestris Huds. Wild Teasel. 

 Echinops sphaerocephalus L. 

 Eragrostis major Host. Stink grass. 

 Euphorbia Cyparissias L. Cypress Spurge. 

 Hypericum perforatum L. St. John's wort. 

 Inula Helenium L. Elecampane. 

 Lactuca Scariola L. Prickly Lettuce. 

 Lappula Lappula (L.) Karst. Stickseed. 

 (Echinospermum Lappula Lehm.) 

 Leonurus Cardiaca L. Motherwort. 

 Lepidium apetalum Willd. Apetalous Pepper-grass. 

 (Lepidium intermedium A. Gray.) 

 Lepidium sativum L. Pepper-grass. 



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

 {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 Crus galli L. Barnyard-Grass. 

 Plantago lanceoata L. Ribgrass. English Plantain. 

 Polygonum Convolvulus L. Black Bindweed. 

 Portulaca oleracea L. Purslane. 

 Ranunculus acris L. Buttercup. 

 Ranunculus bulbosus L. Buttercup. 

 Ranunculus repens L. Creeping Buttercup. 

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

 (Nasturtium sylvestre R. Br.) 

 Rumex Acetosella L. Field or Sheep Sorrel. 

 Rumex crispus L. Curled Dock. 

 Rumex obtusifolius L. Bitter Dock. 

 Salsola Tragus Ty. Russian Thistle. 

 Saponaria officinalis L. Soapwort. Bouncing Bet. 

 Silene noctiflora L. Night-flowering Catchfly. 

 Silene vulgaris (Moench) GarcRe. Bladder Campion. 

 (Silene Cucubalus Wibel.) 



Sisymbrium altissimum L. Tall Sisymbrium. 

 Sisymbrium officinale (L.) Scop. Hedge Mustard. 

 Sonchus arvensis L. Sow-Thistle. 

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

 Sonchus oleraceus L. Snow-Thistle. 



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

 (Panicum glabrum Gaud.) 



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

 (Panicum sanguinale L. 

 Tanacetum vulgare L. Common Tansy. 

 Taraxacum Taraxacum (L.) Karst. Dandelion. 



