44 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



S. squamosa, Sieb. — A minute but very pretty and highly 

 interesting species ; leaves very small, elliptical, squarrosely 

 imbricated, glaucous ; flowers white. Hab. Alps of Tyrol, on 

 dolomite rocks. 



S. casia, L. — Leaves small, glaucous, in rosettes, and 

 densely crowded into pyramids ; flowers small, pure white. Hab. 

 Pyrenees, Mont Blanc. 



S. valdensis, D.C. — A very pretty species, with short, 

 glaucous leaves, and pure white, corymbose flowers. Hab. Very 

 common on Mont Blanc. I found it in 1887 in several places on 

 Mont Blanc and Alps of Haute Savoi. 



S. Vandellii, Sternb. — Leaves deep green, or slightly glaucous, 

 short ; flowers very pretty, white, veined red. Hab. The Alps. 



S. Burseriana, L. — Leaves glaucous, densely tufted ; flowers 

 white, usually solitary. This is one of the prettiest plants of the 

 genus. In its native habitats it forms large specimens several 

 feet across. It is the first in bloom, often in mild winters 

 flowering in January. Hab. Alps of Tyrol, on dolomite rocks. 

 The variety major is a very fine large-flowering plant, freer in 

 bloom and more vigorous than the type. 



S. sancta, Griesb. — With deep green, lanceolate leaves, but 

 in general appearance resembling the mossy saxifrages ; the 

 flowers are small and yellow. This species prefers a damp, half- 

 shaded position on the rock-work, and is of very rapid growth. 

 Hab. Greece, Mount Athos, on marble rocks. 



S. juniper if olia, Adams. With subulate, deep green leaves ; 

 fine spicate flowers of a deep yellow colour. Hab. Caucasus. 



Sect. Porphyrion, Tausch. 



This section includes some of the prettiest of the early 

 flowering Saxifrages. Unfortunately, they do not seem to be 

 very happy in our London climate. They are very easily in- 

 creased by division, and, being of rapid growth when at home, 

 they form dense evergreen carpets, presenting a most beautiful 

 sight during the early spring months. 



S. oppositifolia, L. — This has a creeping stem and small, 

 opposite, oblong leaves of a deep green colour. The flowers are 

 sessile and deep purple. Hab. On nearly all the mountains of 

 Europe, North of Asia, and America. 



