692 Rydberg : Rocky Mountain flora 



outline, twice or thrice pinnatifid into oblong or lanceolate divi- 



5-20 cm. high ; spike dense or in 



sions 



fruit more lax ; bracts and calyx densely white-villous ; corolla 

 about 6 mm. long, dark -blue or purple, or in age paler ; lobes 

 broadly obovate ; stamens slightly exserted; ovary villous; fruit 

 obovate, 6 mm. long, villous or in age glabrate. 



This species is related to Synthyris pinnatifida, and has been 

 mistaken for it, but it differs in the more copious pubescence, espe- 

 cially on the calyx and ovary (in S. pinnatifida these are glabrous 

 or merely puberulent on the margins), in the larger dark corolla 

 with obovate instead of oblong lobes, and in the larger fruit. 

 5. dissecta grows at an altitude of 2000-3000 m. 



Montana: Near Bozeman, June 11, 1900, Chesnut & Jones 



igg (type, in herb. N. Y. Bot. Gard.) ; Bridger Mountains, June 



I5> 1897, ^Rydbcrg & Bessey 4g2y ; same locality, 1899, Flaherty^ 



and June 26, 1899, Blankiiiship ; Old Hollowtop, July 7, 1897, 



Bessey 4^26 ; Beaver Head Co., June, 1888, Tiveedy 70. 



Wyoming: Headwaters, Cliff Creek, Aug. 9-18, 1900, C. C. 

 Ctirtis (good fruit). 



Thalesia Sedi (Suksd.) Rydb. comb. nov. 



Aphyllon 5^^// Suksd. Deuts. Bot. Monats. 18: 155. 1900. 



The three species of the Columbia River region, which have 

 usually been included in Thalesia uniflora^ differ from the plant of 

 the eastern United States in their longer attenuate calyx-lobes. 

 In all three the lobes are about twice as long as the calyx-tube 

 and narrowly subulate from a broad base ; in T. unijlora they are 

 scarcely longer than the tube, lanceolate and gradually tapering 

 from the base of the apex. T. Sedi differs from the other two 

 Columbian species in the lighter-colored corolla, with narrower^ 

 oblong acutish or obtuse lobes, while T. purpurea Heller and 7! 

 mtmita (see below) have dark purple corolla and broad, oval or 

 semiorbicular lobes rounded at the apex or sometimes even retuse. 

 It grows on species of Sedtim and is distributed through parts of 



Oregon, Washington, and western Montana. 



minuta 



Aph) 



IQOO 



This resembles Thalesia purpurea in the color of the flower 



