FLORA OF THE YELLOWSTONE NATIONAL PARK. 31 



MALVACEAE. 



Malvastrum coccineum, Gray. 



Mammoth Hot Springs. Rare within the Park. 



Sphaeralcea rivularis, Torr. 

 Gibbon Canon ; Mammoth Hot Springs in open pine woods. Rare. 



LINACEJE. 



Linum perenne, L. 



Very common at low elevations. Petals sometimes wh'.te. 



GERANIACEJE. 



Geranium Carolinianum, L. 



Hot Sulphur Springs (Adams). 



Geranium incisum, Nutt. 



Very common on the border of woods up to 9000 ft. alt. 



Geranium Richardson! , Fisch. & Mey. 



With the former, but less common. Petals apparently always white. 



Floerkea proserpinacoides, Willd. 



Around springs near Swan Lake. Rare. 



RHAMNACE^l. 



Rhamnus alnifolia, L'Her. 



Along upper East Fork of the Yellowstone, 7000 ft. alt. Rare. 



Ceanothus velutinus, Dougl. 



Rocky hills, Soda Butte, 8000 ft. alt. Rare. 



SAPINDACE.5I. 



Acer glabrum, Torr. 



Wooded hills, Mammoth Hot Springs, 6500 ft. alt. Rare. 



LEGUMINOS^l. 



Lupinus csespitosus, Nutt. 



Meadows and subalpine grassy slopes. Blacktail Deer Creek, 7200 

 ft. alt. ; Mt. Washburne, 9600 ft. alt. ; Mud Springs and Yellowstone 

 Lake (Adams) ; Upper Falls of the Yellowstone (Parry). Rather 

 Common. 



