ROSACE.'E 133 



and at the margin. Petals narrow, wedge-shaped, white. Stamens 

 and carpels hairy. 



Calcareous Alpine and sub-alpine rocks up to 8000 feet. July, 

 August. Carpathians, Jura, Alps, Pyrenees. 



Potentilla rupestris L. 



Flower-stems 10-18 inches high, springing from an almost 

 woody base. Leaves chiefly radical, pinnate, the common stalk 

 rather long ; leaflets 5 or 7, ovate, toothed, green ; stem-leaves 

 few and smaller, often with only thijee leaflets. Flowers few, 

 rather large, milk-white, forming a loose corymb. 



Rocks and hilly places in the sub-Alps ; local. May, June. 



Distribution. — Alps, Jura, Pyrenees, Cevennes, Auvergne, Corsica, 

 most of mountainous Europe as far north as SSveden. Western 

 Asia. Rare in Britain. 



Potentilla fruticosa L. 



This handsome shrub, with silky, sub-digitately pinnate leaves 

 and bright yellow flowers, grows in the Pyrenees and many districts 

 in N. and mid-Europe, but not in Switzerland. This is strange, 

 for it is widely spread elsewhere, and appears in N. and W. Asia, 

 Himalaya, N. America, and in N. England and Ireland. 



Potentilla valderia L. 



Densely tomentose. Crown of root covered with silky hairs. 

 Leaflets 5-7, obovate, wedge-shaped, serrated, velvety on both 

 sides. Corymb compact. Petals obcordate, white, shorter than 

 calyx. Filaments hairy. Calyx-teeth lanceolate, acute. 



Rocky places and pastures in the Maritime Alps and Balkan 

 provinces ; rare. July, August. 



Potentilla Clusiana Jacq. 



Rootstock woody, with thick fibres, many-headed. Stem 

 filiform, ascending, 1-3 leaved, 1-5 flowered, covered with patent 

 hairs. Root-leaves palmately 5-cleft, shortly stalked, shorter than 

 stem ; stem-leaves 3-5 glef t, smaller, segments lanceolate or wedge- 

 shaped, entire or with 3-5 teeth near the apex, nearly glabrous on 

 both sides or silky on lower side and margin. Flowers handsome, 

 milk-white. Petals obovate, longer than calyx-teeth. Filaments 

 glabrous. Capsule villous. Stem and calyx usually tinged with 

 purple. 



Clefts of rock and debris in the Eastern Alps. Generally on 

 limestone and rather rare ; 5200-6500 feet. July, August. 



Potentilla Tormentilla Scop. Common Tormentil. 



Rootstock stout, almost woody. Stems and leaves more or less 

 silky. Lower leaves shortly stalked, upper ones sessile, consisting 

 of 3 or 5 deeply toothed leaflets. Flowers small, yellow, on long. 



