218 HARDY PERENNIAL PLANTS. 



SANTOLINA INCANA (Cotton Lavender) is a dwarf, shrubby plant 

 with silvery-white fragrant foliage. It will thrive in almost any posi- 

 tion with very little attention. Cuttings should be put in during the 

 first half of October; they will root in a cold frame. 



SAPONARIA OFFICINALIS (Bouncing Bet.) Naturalized over a wide 

 area in the United States. The flowers are usually double. S. ocy- 

 moides is one of the best rock work trailers. It passes the Winter with 

 a mass of short growths near the crown; these, on the approach of 

 warm weather, grow very fast, subsequently forming wide-spreading 

 masses of light or dark pink flowers. S. o. splendidissima has rosy- 

 crimson flowers. The plants are in full bloom during the latter part of 

 May, with scattering flowers for a long time after. Seeds should be 

 sown in September, and the plants wintered in a frame. Early planting 

 is necessary. 



SARRACENIA (Pitcher Plant) In the District of Columbia the only 

 species which does not stand the Winter out-of-doors is S. Drummondii. 

 S. purpurea is the hardiest of the number when plants are obtained from 

 Northern sources. They should be planted in a mixture of peat, sand 

 and moss, and the surface given a coating of moss, which must be kept 

 damp, especially during the growing season. Pockets of suitable soil 

 should be made for them at the margins of artificial lakes and ponds. 



SAXIFRAQA (Saxifrage) The extremes of temperature in Summer 

 and Winter work havoc with the great majority of the species, especially 

 those of the mossy and encrusted sections. S. peltata, a Californian 

 species, does grandly where it enjoys moist soil. The leaves are from 1 

 to 2 feet in length. The plant blooms during the latter part of April. 

 S. sarmentosa (Aaron's Beard), a Japanese species, has withstood the 

 Winters here for a long number of years. The foliage is handsome, even 

 in midwinter. There is a form with the leaves beautifully marked with 

 creamy-white and red. The section to which S. ligulata belongs has 

 some exceedingly handsome species, among which are S. purpurascens, 

 flowering in May. S. cordifolia, with bright pink flowers, is frequently 

 seen here peeping through the snow. S. crassifolia is another early 

 bloomer. All of them are easy to increase by division. 



SCUTELLAR4A (Skull-Cap) A rather large genus, embracing stove, 

 greenhouse and hardy species. S. macrantha is one of the best for out- 

 door use. The stems are at first procumbent, the flower spikes ascend- 

 ing. Our hot, dry Summers suit this plant well. It blooms during 

 July and August. The flowers are purplish-blue, and are produced in 

 great abundance. It grows about a foot high. Increased from seed. S. 

 japonica does equally as well as S. macrantha; the flowers are much 

 smaller. In S. orientalis the flowers are yellow; the plant grows from 

 9 inches to 1 foot high. 



SEDUM (Stonecrop) Many of the species differ from each other in 

 habit; some of them are herbaceous plants. S. spectabile grows 2 feet 

 high, forming large and neat clumps; flowers pink. S. Maximowiczii is 

 an erect growing species, about 1 foot in height, with yellow flowers. 

 S. maximum, a v^ry variable species, sometimes attains a height of 2y a 



