46 BOTANY OF MICHIGAN 



ground throughout. Noticed in particular near St. Ignace and on 

 Mackinac Island. 



Dentaria laciniata Muhl. Cut -leaved toothwort. Rich damp shaded 

 ground. Occasional throughout. Probably often overlooked. 



Cardamine bulbosa (Schreb.) BSP. Spring cress. Wet meadow-like 

 ground or in damp and spring}- places. In Bay and Arenac Counties. 

 Perhaps throughout but overlooked. 



Cardamine douglassii (Torr.) Britton. Purple cress. Rich damp 

 shaded ground. In Bay and Arenac counties. Frequent. 



Cardamine pennsylvanica Muhl. Pennsylvania bitter-cress. Wet 

 springy ground, and along creeks throughout. Infrequent. 



Arabis lyrata L. Lyre-leaved rock-cress. Dry sandy open ground, 

 usually on or near sandy beach of Lake Huron. Frequent' throughout. 



Arabis glabra (L.) Bernh. Tower mustard. Dry open or partially 

 shaded ground. Frequent throughout. 



Arabis drummondi Gray. Drummond's rock-cress. Dry open ground 

 on Mackinac Island, Mackinac County, and also near Harrisville, Alcona 

 County. Probably to be found throughout. 



Arabis holboellii Hornem. Holboell's rock-cress. Dry sandy open 

 ground near Alpena and on sandy beach at Mackinaw City. Frequent. 



CAPPARIDACEAE. Caper Family 



Polanisia graveolens Raf. Clammy-weed. Sandy open ground at 

 Bay City. G. M. Bradford. 



SARRACENIACEAE. Pitcher-plant Family 



Sarracenia purpurea L. Pitcher plant. Swampy ground and often 

 abundant in damp sand. Common throughout. 



DROSERACEAE. Sundew Family 



Drosera rotundifolia L. Round-leaved sundew. Open swampy ground 

 or in damp sand. Frequent throughout. 



Drosera longifolia L. Oblong-leaved sundew. In bogs near Alpena. 

 Plentiful. H. H. Hindshaw. 



Drosera linearis Goldie. Slender-leaved sundew. Wet boggy places 

 on Bois Blanc Island, Mackinac County. Plentiful. 



CRASSAULACEAE. Orpine Family 



Penthorum sedoides L. Ditch stonecrop. Open swampy ground from 

 Bay County to St. Ignace, Mackinac County. Plentiful. 



Sedum acre L. Mossy stonecrop. In dry sandy open ground along 

 roads, in cemeteries, cities and villages. Often abundant. 



Sedum purpureum Tausch. Live-for-ever. Along roads, near cities 

 and villages. Frequent throughout. Seldom blooming. 



