MARYLAND WEATHER SERVICE 439 



Dentaria heterophylla Nutt. Slender Toothwort. 



Midland Zone; in moist forests; infrequent. 

 Baltimore County, near Bare Hills (W. Ralph Jones). 



Bursa bursa-pastoris (L.) Britton. Shepherd's Purse. 



Throughout the state; in cultivated grounds and waste places; common. 

 Introduced from Europe. 



Camelina sativa (L.) Crantz. 



Baltimore County, near Cockeysville (Robert K. Miller). 



Draba verna L. Vernal Whitlow-grass. 



Throughout the state; in open situations; common. 

 Talbot County, Easton (1358). 



Draba ramosissima Deav. Branching Whitlow-grass. 



Washington County, Round Top (717). 



Stenophragma thaliana (L.) Celak. Mouse-ear or Thale-cress. 



Throughout the state; in cultivated grounds aud waste places; frequent. 

 Introduced from Europe. 



Arabis lyrata L. Lyre-leaved Rock-cress. 



Throughout the state; in open dry situations; common. 

 Baltimore County, Soldiers Delight (1410). 



Arabis dentata T. & G. Toothed Rock-cress. 



Montgomery County, Cabin John (Joseph H. Painter). 



Arabis laevigata (Muhl.) Poir. Smooth Rock-cress. 



Baltimore County, Towson (Robert K. Miller). 



Arabis canadensis L. Sickle-pod. 



Midland and Mountain Zones; in moist fields; infrequent. 

 Garrett County, Kelso Gap (5G7). 



Erysimum cheiranthoides L. Worm-seed or Treacle Mustard. 



Allegany County, Cumberland (Howard Shriver). 



Berteroa incana (L.) DC. Hoary Alyssum. 



Baltimore County, Frederick Road (Jos. H. Brummell). 



CAPPARIDACEAE. 



Cleome spinosa L. Spider-flower. 



Allegany County, Cumberland (Howard Shriver). 



Polanisia graveolens Raf. Clammy-weed. 



Kent County, Lloyds Creek (1704). 



RESEDACEAE. 



Reseda lutea L. Yellow Cut-leaved Mignonette. 



Baltimore County, Canton; on ballast (Robert K. Miller). 



