Hosackia 



Leguminosae 



597 



50 



Map 1220 



Tnfolium procumbens L 



Jan. 



Feb. 



Mar. 



Apr. 



May 



June 



July 



Au& 



Sept. 



Oct. 



Nov. 



Dec 



Miles 



50 



Map 1221 



Tnfolium agranum L. 



o~ 50 



Map 1222 



Psoralea tenuiflora Pursh 



8. Trifolium dubium Sibth. Little Hop Clover. In 1909 I found 

 this species in gravelly soil among the cottages on the north side of Lake 

 Wawasee. It has been collected in St. Joseph County by Nieuwland, and 

 on May 17, 1930, Nieuwland and Just again collected it in St. Joseph 

 County on the bank of the St. Joseph River behind St. Mary's College. 



Nat. of Eu. ; Mass. to Va., Tenn., and Ark., southw. to Ga. and Miss. 



9. Trifolium agrarium L. Yellow Hop Clover. Map 1221. Prob- 

 ably introduced throughout the state. My specimens are mostly from 

 open woods, pastures, fallow fields, and roadsides. 



Nat. of Eu. ; Newf. to Ont. and Iowa, southw. to Ga. 



3696. HOSACKIA Dougl. 

 See excluded species no. 391, p. 1066. 



3703. PSORALEA [B. Juss.] L. 



Leaves digitately 3-5-foliolate, the petiolules of about equal length; both surfaces of 



the leaflets conspicuously black-dotted; pods not wrinkled 1. P. tenuiflora. 



Leaves 3-foliolate; terminal leaflet stalked; the lower surface not conspicuously covered 

 with black dots; pods wrinkled. 



Racemes short, 1-2 cm long, about equaling the leaves 2. P. stipulata. 



Racemes more than 2 cm long, mostly longer than the leaves. 



Leaflets large, rhombic-ovate to rhombic-lanceolate, 5-10 cm long, 2.5-6 cm wide; 



pods about 1 cm long 3. P. Onobrychis. 



Leaflets linear-lanceolate to elliptic, 4-7 cm long, 1-2 cm wide; pods about 4 mm 

 long 4. P. psoralioides var. eglandulosa. 



1. Psoralea tenuiflora Pursh. Few-flower Psoralea. Map 

 1222. In 1933 I found scattered plants of this species in ballast along the 

 railroad for a quarter of a mile about 4 miles south of Vincennes, Knox 

 County. Nieuwland has collected it in St. Joseph County. In 1901 Stuart 

 reported it as found along the railroad south of Lafayette. Peattie reported 

 it from the prairies of the Calumet District near Lake Michigan. 



111. to S. Dak. and Mont., southw. to Tex. and Sonora. 



