(500 



Leguminosae 



Dalea 



Map 1227 

 Petalostemum purpureum (Vent.) Rydb 



50 



Map 1228 



Petalostemum candidum Michx. 



from Spencer, Switzerland, and Vigo Counties and Miss McKee found it 

 in Newton County near the Kankakee River. 



Wis. and Minn, to Sask., southw. to Tex., and n. Mex. 



1. 



3709. DALEA Juss. 

 Dalea alopecuroides Willd. On September 11, 1924, Mrs. Harry 



Bucklin of Brazil sent me a specimen which was collected at her summer 

 home located in section 24 about 6 miles northeast of Brazil, Clay County. 

 She wrote: "Frequent along the roadside and in an adjoining fallow field." 

 I found the colony still persisting in 1934. No doubt introduced in seed of 

 some kind since the farm is located on a little used road and not near a 

 railroad. 



111. to Minn., southw. to Ala., Tex., Ariz., and Mex. 



3710. PETALOSTEMUM* Michx. 



Leaflets 3-5, mostly linear, involute; calyx tube densely pubescent; corolla violet or 

 purple 1. P. purpureum. 



Leaflets 7-9, linear, oblong, or oblanceolate, not involute; calyx tube glabrous, at least 

 below the middle; corolla white 2. P. candidum. 



1. Petalostemum purpureum (Vent.) Rydb. Purple Prairieclover. 

 Map 1227. Infrequent in dry, sandy or gravelly soil in the open on sandy 

 knolls and ridges in open, black oak woods and in prairie habitats. It is 

 sometimes frequent on the low dunes along Lake Michigan. East of the 

 area indicated in the map, it has been reported from Kosciusko and Mar- 

 shall Counties. 



Ind. to Sask., southw. to Ark., Tex., and N. Mex. 



2. Petalostemum candidum (Willd.) Michx. White Prairieclover. 

 Map 1228. This species is rarer than the preceding and grows in the 

 same habitat and usually with it. 



Ind. to Sask.. southw. to La. and Tex. 



Spelled Petalostemon in the International Rules of Botanical Nomenclature, p. 99. 



