238 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



Prairies and plains, up to an altitude of 1500 m. It differs from 

 P. candidiini in the more branched stem and the long lax spike. 



Montana: Lewis and Clarke Co., J//-5. Miith : Hilger's, 1892, 

 F. D. Kclscy ; Custer Co., 1892, 3frs. Light ; Horned Creek, 1883, 

 Scrtbncr, 2^. 



* Petalostemon multiflorum Xutt. Journ. Phil. Acad. 7 : 92 ; Kiihn- 



istera mtiUiflora Heller, Mem. Torr. Bot. Club, 5: 197 [111. Fl. 



2: 290]. 



Prairies and plains. Altitude, 600-1500 m. Like the last, but 

 with ver}^ short almost globose heads. 



Montana: Great Falls, F. W. Anderson^ Sj ; Snow}^ Mts., 

 1882, Catiby. 



* Petalostemon molle. 



Stems several from a woody caudex, strict, leafy, striate and densely 

 woolly, about 3 dm. high, stout; leaves densely villous, 2-3 cm. 

 long, with two pairs of linear leaflets, 10-15 "i"!* long, 1.5-2 mm. 

 wide, obtuse, more or less inv^olute, head oblong-cylindric, 2-4 cm. 

 long and 12 mm. in diameter; bracts longer than the flowers, with 

 a lanceolate base and a hliform almost plumose hairy tip ; calyx 

 densely silky-villous with vellow or brownish hairs, the lobes lanceo- 

 late ; corolla rose-color. 



It is nearest Pctaloslcmou piirpurcuni and may be a form of it. 

 It differs, however, in the broader and obtuse leaflets, the densely vil- 

 lous pubescence of the stem and leaves, the paler flowers and the long 

 and spreading hairs of the tips of the bracts. It grows on dry 

 prairies and hills. 



Montana: Snowy Mts., 1882, Canby ; Hound Creek, 1883, 

 Scrib)ier, yj ; 1896, Pvdberg-, j^^o : E. .A''. Brandcorc, 81. 



Petalostemon purpureum (\^ent.) ; Daica purpurea Vent. Hort. 



Cels. pi. ^o; Petalostemon violacetim Michx. Fl. Bor. Am. 2 : 50 



[Man. R. M. 58] ; Kuhnistera purpurea MacM. Met. Minn. 329 



[111. Fl. 2: 290]. 



Prairies and plains, up to an altitude of 1500 m. 



Montana: Helena, 1892, Mrs. Muth : Lewis and Clarke Co., 

 Mrs. Muth; Custer Co., 1892, Mrs. Light; Smith River, 1883, 

 Seribiier, 22; Musselshell River, 1882, Canby. 



Petalostemon villosum Nutt. Gen. 2 : 85 [Man. R. M. 59] : Kuhn- 

 istera villosa Kuntze, Rev. Gen. PI. 192 [111. Fl. 2: 291]. 

 Sand hills. 



