328 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



A perennial species with bright blue flowers 1-2 cm. in diameter, 

 simple stems, soft pubescence, and with very flat marginal prickles. 

 Mountain sides, at an altitude of 1500-2000 m. 



Montana: Bridger Mountains, June 12, 1897, J^ydbe?-g & 

 Bessey, ^Sgy ; Upper Sand Coulee, 1888, R. S. Williams. 



Yellowstone Park : Mammoth Hot Springs, 1885, Tzfccdy, 806. 



* Lappula coerulescens. 



Stems several, from a perennial root, ascending, 4-6 dm. high, 

 grayish-strigose, simple up to the inflorescence ; basal leaves 5-10 

 cm. long, rather numerous ; blade oblanceolate or spatulate, obtuse, 

 grayish-strigose and ciliate-margined, tapering into a winged 

 petiole; stem-leaves oblong, 2-5 cm. long, sessile or the upper ones 

 somewhat clasping ; inflorescence open and rather loosely flowered ; 

 calyx strigose, its lobes oblong, obtuse, about 2 mm. long; corolla 

 6-10 mm. in diameter, whitish or more often light sky-blue, and 

 always more or less distinctly veined with blue. 



Nearest related to L. diffusa, but the flowers are smaller, 

 always blue-veined, and the pubescence is much shorter and ap- 

 pressed, except the longer ciliation on the margin of the leaves, 

 this latter character also separating it from Z. hispida. It may be close 

 to L. ciliala, which I have not seen, the pubescence in which, 

 according to the description, must be like that of the present species. 

 The corolla of L. ciliata, however, is described as blue, and the 

 leaves as linear or narrowly lanceolate, which is never the case in 

 L. coerulescens. It is rather common on hillsides, at an altitude of 

 1500—2500 m. 



Montana: Bridger Mountains, June 15 and 18, 1897, Rydhcrg 

 & Bessey, 48^8 and ^Sgg (type); Lima, 1895, Rydbcrg, 2yj4; 

 Bozeman, 1892, W. T. Shaiv ; Bozeman Pass, 1883, Canhy, 241. 



Yellowstone Park : Mammoth Hot Springs, 1885, Tzveedy, 8^. 

 Lappula floribunda (Lehm.) Greene, Pittonia, 2: 182 [111. Fl. 3: 



55]; Ec/iiiiospcnnuni florihundiim l^<i\\n\. Pug. 2: 24 [Syn. Fl. 



2': 189; Man. R. M. 258] ; E. defiexum llorihiiiidiiin Wats. Bot. 



Cal. I : 530. 



In valleys, at an attitude of 1000-2500 m. 



Montana: 1888, F. D. Kclsey ; Bozeman, 1887, F. Tzuccdy, 

 224; Park Co., 1887, 222; Bridger Mts., June 10-17, 1897, Ryd- 

 berg <£■ Bessev, 48^4 and 48^6; Spanish Basin, June 26, 48pj ; West 

 Gallatin, 1892, W. T. Sltazi' : Silver Bow Co., Mrs. Moore; Boze- 

 man Pass, 1883, Canby, 240; 1883, Scribiicr, iji. 



Yellowstone Park: 1883, Mary Compton. 



