676 Rydberg : Rocky Mountain flora 



the corolla, villous-bearded ; seeds 4, dark chestnut-brown, 2 

 mm. long, puberulent, ellipsoid, strongly but finely faveolate. 



This resembles P. leticophylla Torrey in general habit, but differs 

 in the narrow and more strongly ribbed calyx-lobes, the smaller 

 and white corolla, and the more finely faveolate seeds. 



Idaho : Snake Country, Biirkc (type, in herb. Columbia Univ.). 



Washington : Collector not given. 



Phacelia leptosepala sp. no v. 



Perennial, with a taproot and a more or less cespitose root- 

 stock ; stems ascending, hirsute, 1—3 dm. high ; leaves usually 

 simple, hirsute on both sides, 5— 10 cm. long, oblanceolate or ellip- 

 tic ; the lower ones petioled ; inflorescence with several short 

 branches ; calyx hirsute ; lobes narrowly linear, hirsute, nearly as 

 long as the corolla, acute ; corolla white, glabrous or nearly so, 5 

 mm. long ; filaments about twice as long, sparingly villous-bearded. 



This species is probably most nearly related to Phacelia nemo- 

 ralis Greene, but differs in the low, slender, ascending stems, the 

 cespitose habit, the longer and narrower, acute sepals, and the less 

 bearded stamens. It somewhat resembles P. alpina in habit, but 

 differs in the narrow calyx-lobes almost equaling the white corolla 

 and in the hirsute pubescence, which consists only of coarse hairs. 



British Columbia : Vermilion Lake, Aug. 5, 1905, Edith M. 

 Fan- 10 1 J (type, in herb. N. Y. Bot. Gard.) ; Avalanche debris 

 above Lardo, Selkirk Mountains, June 16, 1905, S/uiui 6g^. 



Montana: Mount MacDougal, 1901, UinbacJi ijQ ; Sperry 

 Glacier, 1903, Uvibach 826. 



Lappula leucotricha sp. nov. 



Annual ; stem 2-4 dm. high, slender, branched above, densely 

 pilose, especially below, with long white hairs ; basal leaves ob- 

 lanceolate, 2-4 cm. long, softly pilose on both sides ; stem-leaves 

 linear or oblong, numerous ; bracts linear-lanceolate ; sepals linear, 

 2.5-3 "^n^- lo^g. i" fruit 4-5 mm.; corolla white, 3-3.5 mm. 

 long, 3 mm. broad ; fruit erect, about 5 mm. wide ; nutlets about 

 2.5 mm. long, light, almost straw-colored ; marginal prickles in 

 one row, not united into a disk, but broadened below and flat, 

 scarcely grooved ; back strongly muricate. 



This species is related to Lappiila occidcntalis (S. Wats.) Greene, 

 but differs in the soft white spreading pubescence, the white 



