ROSE FAMILY. Rosaceae. 



Potentilla 

 Robbinsiana 

 Yellow 

 June-August 



A dwarf Alpine species found o* A oib 

 summits of the White Mountains, rather 

 soft-hairy when young, but smooth later, 

 and with three coarsely toothed leaflets, 

 deep green and somewhat broad. The 

 small yellow flowers are slender-stemmed and generaUy 

 solitary. 1-3 inches high. Found about the Lake of 

 the Clouds and elsewhere on Mt. Washington. Poten- 

 tilla tridentata, also found on Mt. Wash- 

 ington and Mt. Wachusett, is less dwarfed, 

 but low-growing. The three leaflets are 

 coarsely three-toothed at the tip, smooth 

 and thick. The flowers are white. 1-10 

 Coast of Mass., northward, and shores of 

 the upper Great Lakes. 



This is the only purple-flowered five- 

 finger and it is therefore readily distin- 

 guished from the others. The reddish 

 stem is stout, mostly smooth, and a trifle 

 woody at the base. The leaves have from 

 5-7 leaflets which are blunt-tipped, and 

 sharp-toothed. The rather pretty flowers 

 are magenta-purple within and pale or 

 greenish without, through the influence of the some- 

 what longer green sepals ; the blossom is nearly one inch 

 broad, and its petals are pointed. 6-20 inches long. In 

 swamps and cold bogs, from Me., south to N. J., and 

 west to Cal. 



This is indeed a shrubby species with 

 nearly erect stems, tan brown in color, 

 and quite leafy ; the bark is inclined to 

 peel off in shreds. The leaves are entirely 

 different from those of the other species ; 

 they are toothless, olive yellow-green, with 

 5-7 lance-shaped leaflets whose edges 

 curve backward. They are silky hairy. The deep yel- 

 low flowers, with rounded petals are generally an inch 

 broad. 1-2 feet high. It is a troublesome weed in N. 

 Y., western Vt., Mass., and parts of the west. Swamps 

 and wet places, Me., south to N. J., and west. 



Potentilla 

 Iridentata 

 White 

 June-August 



inches high. 



Marsh Five= 

 finger or Pur- 

 ple Cinquefoil 



Potentilla 



palustris. 



Magenta=> 



purple. 



June-August 



Shrubby 

 Cinquefoil 



Potentilla 

 fruticosa 

 Yellow 

 June- 

 September 



