Cardamine CRUCIFERAE Arahis 



C. hirsuta L. 



Rare: Piedmont and Coastal Plain: y^ mi. n. w. of Octoraro 

 Station (Ce), L. F. A. T anger, 3029, 27 April 1939 (A); roadside 

 2% mi. s. of Milton (S), R. R. Tatnall, 4427, 27 April 1940 (T, P, 

 G); thicket 1^ mi. e. of Wattsville (Ac), R. R. Tatnall, 4440, 28 

 April 1940 (T). Late April, May. 



C. parviflora L. var. arenicola (Britt.) 0. E. Schulz. (See Rhodora 

 29, 192. 1927.) 

 Infrequent in rocky woods and sandy soil of New Castle and 

 Cecil Counties. Late April to mid-June. 



C. pennsylvanica Muhl. 



Frequent in wet meadows of the Piedmont area; several collec- 

 tions in Talbot County, Earle (P) . Late April to June. 



C. Longii Fernald. 



One collection: tidal shore of North East River, Charlestown 

 (Ce), Long, 57097, 20 July 1941 (A). 



Arabis L. Rock Cress. 

 A. lyrata L. 



Frequent on rocky and sandy soils, including serpentine, New 

 Castle and Cecil Counties. Mid-April to June. 



A. dentata T. & G. 



Known only from two collections along the Susquehanna River 

 at Bald Friar (Ce) : J. J. Carter, 29 May 1907 (A) ; Long & St. John, 

 18 April 1913 (A). 



A. glabra (L.) Bernh. See Hopkins: Rhodora 39, 108. 1937. 



One collection: field near Concord Station, Wilmington, Com- 

 mons, 31 June 1896 (A). 



A. Drummondii Gray. See Hopkins, 1. c. p. 139. 



One collection: Concord Station, Wilmington, Commons, June 

 1897 (A). 



A. laevigata (Muhl.) Poir. 



Infrequent; rocky hills along Brandy wine Creek (NC), and 

 Susquehanna River (Ce); apparently local. Mid- April, May. 



A. canadensis L. Sickle-pod. 



Frequent in rocky woods of the Piedmont. Late May, June. 



[133] 



