THE SAXIFRAGES 79 



Alpine Saxifrage with purple flowers and opposite 

 leaves. This is the Two-flowered Saxifrage (S. biflora, 

 All.). Here, however, the flowers are not solitary, 

 but borne two to five together, and the leaves are more 

 distant from one another. Otherwise the resemblance 

 to S. oppositi/olia is marked. 



We now turn to another series of Saxifrages, in 

 which, instead of a single chalk-gland existing at the 

 tip of the leaf, as in S. oppositi/olia and S. biflora, or 

 a line of glands occurring all round the edge, as in S. 

 aizoon and S. cotyledon, we find only a limited number 

 of chalk-glands, usually situated near the tip. The 

 Glaucous Saxifrage, S. ccesia, Linn., is the commonest 

 of these species, S. diapensioides, Bellard, being rarer 

 and confined to the Canton Valais. The leaves of S. 

 ccesia are borne in rosettes of a bluish - green tinge, 

 and are bent or arched backwards almost from the 

 base. Otherwise this plant is in no degree remark- 

 able as compared with other Saxifrages. 



The species of Saxifrage in which chalk-glands are 

 absent from the leaves are more numerous, but are 

 not, for the most part, deserving of special notice. 

 The greatest contrast which they present is chiefly in 

 the leaves. The Yellow-flowered Saxifrage (Saxifraga 

 aizoides, Linn.), a frequent British Alpine, is also 

 common, especially in damp places, in Switzerland. 

 The leaves are narrow, rather thick, quite smooth and 

 shining, and are not arranged in rosettes. The flowers 

 are worth noticing on account of their red pollen and 

 yellow honey nectaries. The sepals and petals are 



