THE NURSERY-LIST 419 



S. Emmeliana (one of the best kinds) should be scattered thinly 

 over the surface of the soil, covered with glass and kept in tempera- 

 ture of 70 ; they will soon form roots and little plants at almost 

 every joint. 



Selenicereus. Cactaceoe. 

 For propagation, see Cacti, page 261. 



Selenipedium : Phragmopedilum ; see Orchids, page 372. 



Sempervivum (Houseleek). Crassulaceoe. 



Readily increased by seeds, and by the young plants (offsets) 

 that cluster around the base. 



Senecio (Groundsel. Ragweed). Composites. 



A multifarious group of annual and perennial herbs and sub- 

 shrubs. Seeds usually are freely produced and grow readily. The 

 perennials may be divided. Stem-cuttings and root-cuttings may 

 be used. German ivy (Senecio mikanioides) is easily multiplied by 

 cuttings of the running shoots. 



Sequoia, Wellingtonia (Redwood). Pinacece. 



Propagated by seeds handled in a frame or half -shady place or by 

 layers, and cuttings treated like those of retinospora and yew. The 

 redwood (S. sempervirens) reproduces itself in nature by stump- 

 sprouts as well as by seeds ; the big tree (S. gigantea) only by seeds. 



Serissa. Rubiacece. 



Handled by cuttings, under glass ; by seeds, when procurable. 



Sesamum (Bene). PedaliacecB. 



Grown from seeds, sown under glass, or in the South in the open 

 border. 



Sesbania. Leguminosoe. 



The annuals increased by seeds ; the shrubby kinds by firm 

 cuttings under glass. 



Shallot (Allium ascalonicum) . Liliacece. 



Grown from " cloves," formed by the breaking up of the main 

 bulb. 



Shepherdia. Elceagnaceoe. 



Propagated by seeds sown in the fall or stratified until spring. 

 See Buffalo-berry. 



