188 FLOWERS OF GARDEN AND GREENHOUSE 
beta cctece Most of the species being perennial and tufted, are 
"most readily propagated by divisions. The rootstock of 
S. umbrosa sends out so many branches that it forms dense masses from 
which tufts may be cut, and these root readily without flagging. 
The smaller mossy kinds are as readily increased, but in their case the 
divided portions should be kept moist and in the shade until firmly rooted. 
Those with runners, like S. sarmentosa, should be pegged down in pots 
and rooted before separating from the parent. As a rule, the Saxifrages 
thrive best on rock-gardens, but a few (indicated in above list) are 
natives of marshy ground, and for these provision should be made by a 
liberal admixture of peaty soil in their compost. A very beautiful effect 
may be obtained by forming a special Saxifrage garden on the rockery 
principle, with S. wmbrosa and S. cotyledon occupying the heights, where 
their abundant and graceful panicles show to perfection. The mossy 
section would grow between and over the stones at various heights, 
according to size and robustness, whilst moisture-loving kinds could be 
accommodated at-the foot. The half-hardy kinds should be kept moder- 
ately dry during the winter, and care must be taken to prevent moisture 
gathering in the dense foliage at this period. They are all among the 
most easily cultivated of plants. The annual species sow themselves. | 
Description of Plate 87 represents Saxifraga sarmentosa, or Creeping. 
Plates 87 to 89. Sailor, of the natural size, with a runner (sfolon) and young 
plant. Fig. 1 is an enlarged flower in section, showing the dissimilarity 
_ in size and colour of the petals. 
Plate 88 includes two species: A is S. umbrosa, or London Pride, 
natural size. Fig. 1 is an enlarged view of a flower, and Fig. 2 is a 
section through the carpels of the same. B is S. Huetii, a portion being 
enlarged in Fig. 8; the seed, natural size and enlarged, at Fig. 4; and a 
seedling, Fig. 5. 
Plate 89 gives a half-sized portrait of S. crassifolia, the thick-leaved 
Saxifrage, with its thick rootstock and its dense panicle of rosy flowers, 
one of which is shown in section at Fig. 1; 2 represents the detached carpels. 
HYDRANGEAS 
Natural Order SaxirRacEx. Genus ydranged 
Hyprancea (Greek, hydor, water, and aggeion, a vase or vessel ; from 
me sevicae of the fruit), A genus of about thirty shrubs or trees, with 
opposite, stalked leaves and showy flowers in large terminal corymbs oF 
