Draba 



Cruciferae 



503 



50 



Map 1036 



Draba reptans (Lam.) Fera. 



50 



Map 1037 

 Descura'nia brachycarpa 

 (Richardson) Schulz 



Plants not conspicuously branched, not leafy to the flowers, other parts besides the 

 pods glabrous, pubescence not appressed; flowers white; pedicels of the mature 

 pods more than 2 mm long; pods generally more than 4 mm long. 



Pedicels of the lowest pods more than 1 cm long 2. D. verna. 



Pedicels of the lowest pods less than 1 cm long. 



Pods glabrous 3. D. reptans. 



Pods minutely appressed-pubescent. (See excluded species no. 272, p. 1053.) 



D. reptans var. micrantha. 



1. Draba brachycarpa Nutt. Short-fruited Whitlowgrass. Map 

 1034. Found locally in dry, sandy soil in woodland pastures and on wooded 

 slopes in a few of our southwestern counties. It has been reported by 

 Nieuwland from Lake, La Porte, and St. Joseph Counties but I could not 

 find specimens from these counties in the herbarium at the University of 

 Notre Dame. Buhl (Amer. Midland Nat. 16: 251. 1935) refers a report 

 by Peattie from the Calumet District to D. reptans. 



Va., 111., Mo., and Kans., southw. to Fla. and Tex. 



2. Draba verna L. Vernal Whitlowgrass. Map 1035. The common 

 name is derived from the use of this plant in the cure of whitlow disease. 

 Locally frequent to common as a weed in dry soil in pastures, waste places, 

 and cultivated grounds. It has been reported from eight counties not indi- 

 cated on the map. It is much more conspicuous after fruiting when the 

 valves have fallen. The writer has seen it in several counties in this stage of 

 growth but specimens were not collected. 



Nat. of Eurasia; e. Mass. to Minn., southw. to Ga. and Tenn. 



3. Draba reptans (Lam.) Fern. (Rhodora 36: 368. 1934.) (Draba 

 caroliniana Walt.) Carolina Whitlowgrass. Map 1036. Generally found 

 in very dry, sandy soil in woodland pastures, fallow fields, and waste 

 places, along roadsides, and on open, wooded dunes. The variety has been 

 reported from the dune area. Although I have not seen a specimen, it 

 should be sought in the state. 



Eastern Mass., s. Ont., Minn, to Idaho, southw. to Ga. and Ariz. 



