MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. I49 



Arenaria capillaris nardifolia (Ledeb.) Kegel, Bull. Soc. Nat. Mosc. 



35 : 247 [Syn. Fl. i^ : 240 ; Man. R. M. 35] : Arenaria nardifolia 



Ledeb. Fl. Alt. 2 : 106. 



Rare among rocks, at an altitude of 3000 m. It differs from the 

 variet3^of the preceding species in the bracts, which are not scarious. 



Montana: Old Hollowtop, Pony Mts., July 7, 1897, Rydberg & 

 Bessey, 40jy. 



Arenaria Hookeri Nutt. ; Torr. & Gray, Fl. N. Am. i : 178 [ Syn. Fl. 



i^ : 242 ; 111. Fl. 2 : 32] ; Arenaria FranMinii minor Hook. & 

 Arn. Bot. Beech. 326 [Man. R. M. 35]. 



Dry hills and plains ; it may reach an altitude of 2000 m. 



Montana: Cottonwood Creek, iS(^6, Flodnum, 4jg; Livingston, 

 1889, F. Tzveedy ; Surprise Creek, 1888, 7?. .5'. Williams^ 760; 

 Shields River, 1883, Scribner, 12 bis. 



* Arenaria tenella Nutt. Torr. & Gray, Fl. N. A. i : 179 [Syn. 



Fl. i^: 244]. 



Stem very slender, i dm. high or less ; leaves attenuate from a con- 

 nate strongly ribbed base to a filiform apex ; sepals acuminate and 3- 

 ribbed. 



Yellowstone Park: 1883, Miss Mary Compton. 



Arenaria verna equicaulis A. Nelson, Bull. Torr. Bot. Club, 26 : 

 2^2 '■> Arenaria verna var. hirta Wats. Bot. King's Exp. 5: 41 

 [Syn. Fl. i^ 246; Man. R. M. 35] ; not A. hirta Wormsk. 

 In crevices of rocks, at an altitude of 2000-3000 m. 

 Montana : Spanish Peaks, 1896, Flodnian, 442; Little Belt Pass, 

 440 ?ind 440a ; Bridger Mts., June 12 and 15, 1897; Rydberg & 

 Bessey, 4048 and 40 jo; Upper Sand Coulee, 1888, R. S. Williams^ 

 722 ; Little Belt Mts., 1883, Scribner, 12; Grasshopper Canon, 1880, 

 Watson; Sweet Grass Canon, 1895, Flodman, 441; Old Hollowtop, 

 Pony Mts., July 9, 1897, Rydberg & Bessey, 404Q and 40^1- 

 Yellowstone Park: Mt. Norris, 1885, Tzveedy, 767. 



* Arenaria Rossii Richards.; Frankl. ist Journ. 738 [Syn. Fl. i^ : 



246]. 



Resembling the last, but glabrous and closely tufted ; leaves fleshy, 

 3-edged ; sepals less attenuate, slightly fleshy and more indistinctly 

 ribbed. 



Yellowstone Park: 1884, Tzveedy, 2go; Soda Butte, 1885, 

 166. 



Montana: Upper Marias Pass, 1883, Canby, 43. 



