MICHIGAN ACADEMY OF SCIENCE. 267 



Crucifer^ — Mustard Family. 



T Idas pi arvense I^. Penny Cress. 



Lepidium virgmicum L. Wild Peppergrass. 

 Brasstca arvensis (L.) Ktze. Charlock. 

 Brassica nigra (L.) Koch. Black Mustard. 

 Sisymbrium altissimum h. Tumble Mustard. 

 Erysimum cheirantJioides L. Worm-Seed Mustard. 

 Radicula palustris (L.) Moench. Marsh Cress. 

 Arahis glabra (L.) Bernh. Tower Mustard. 



Saxifragaceje — Saxifrage Family. 

 Ribes fioridum L'Her. Wild Black Currant. 



Rosacea — Rose Family. 



Spiraea salicifolia L. Meadow-sweet. 



Pyrus coronaria L. American Crab. 



Pyrus melanocarpa (Michx.) Willd, 



Amelanchier canadensis (L.) Medic. Var. Botryapium (L. f.) T. and G. 



Fragaria virginiana Duchesne. 



Potentilla monspeliensis L. 



Potentilla argentea L. Silvery Cinquefoil. 



Potentilla canadensis L. 



Geum striatum Ait. 



Rubus triftorus Richards. Dwarf Raspberry. 



Rubus allegheniensis Porter. 



Rubus villosus Ait. Dewberry. 



Rosa humilis Marsh. 



Prunus serotina Ehrh. Wild Black Cherry. 



Prunus pennsylvanica L. f. Wild Red Cherry. 



Prunus americana Marsh. Wild Plum. 



Leguminosje — Pulse Family. 



Baptisia tinctoria (L.) R. Br. Wild Indigo. 

 Lupinus perennis L. Wild Lupine. 

 Trifolium pratense L. Red Clover. 

 Trifolium repens L. White Clover. 

 Trifolium agrarium L. Yellow Clover. 

 Melilotus alba Desr. White Sweet Clover. 

 Medicago saliva L. Alfalfa. 

 Robinia Pseudo-Acacia L. Common Locust. 

 Desmodium nudiflorum (L.) DC. 

 Lathyrus palustris L. 



