ROSE TRIBE. 187 



* P. alpestris (Alpine Cinquefoil), is considered by 

 some botanists a variety of the preceding ; by others, a 

 distinct species. It is somewhat larger, and the stem 

 has a more upright growth. P. opdca (Saw-leaved" 

 Hairy Cinquefoil) occurs only on the hills of Clova and 

 Braes of Balquidder, Scotland. The leaves are deeply 

 cut throughout, and the stem is stouter than in the two 

 last, but in other respects it is very like. 



*** 'Leaves 3 on a stalk, ternate. 



5. P. Fragariastrum (Strawberry-leaved Cinquefoil). 

 Stem prostrate ; leaflets inversely egg-shaped, cut, 

 silky on both sides ; petals equalling the calyx in length. 

 Banks and hedges ; abundant. One of the earliest 

 spring flowers, often confounded by young botanists with 

 the wild Strawberry, Fragaria vesca. It may, however, 

 be always distinguished by its prostrate mode of growth, 

 and short, notched petals ; the flower-stalks of the Straw- 

 berry being erect, and the petals entire. Fl. January 

 May. Perennial. 



* P. tridentdta (Three-toothed Cinquefoil), a rare 

 species, found only on the Clova hills, is distinguished 

 from the last by its oblong, wedge-shaped leaflets, each 

 of which ends in 3 points. The petals are white, and 

 longer than the calyx. 



Upwards of a hundred and fifty species of Potentilla 

 are described by botanists, inhabiting both the Eastern 

 and Western Hemispheres, and preferring, generally, 

 moist or rocky situations. They are all easy of cultiva- 

 tion, and some of them are handsome when in flower. 

 They will grow in any common garden soil, and are 

 easily increased, either by dividing the plants or 

 by seed. 



