16 PRACTICAL PLANT PROPAGATION 



SPIRAEA. Bridal Wreath and Meadow Sweet. 



SEEDS. Many sorts grow nicely from seed especially S. arguta, S. 

 Billardii, S. salicifolia, S. sorbifolia, S. Thunbergii, S. tomentosa, 

 and S. Van Houttei. 



*CUTTINGS. Soft wood cuttings taken in late Spring of some sorts, 

 especially S. bumalda yar. Anthony Waterer, S. callosa, S. prunifolia, 

 S. Reevesii, S. rotundifolia and S. Thunbergii. Hard wood cuttings 

 are much used for S. arguta, S. Billardii, S. Douglassiana, S. ro- 

 tundifolia, S. salicifolia, S. tomentosa, and S. Van Houttei. 



DIVISION. S. b. Anthony Waterer is example. 



ROOT CUTTINGS. S. sorbifolia is propagated in this way. 



STAPHYLEA. Bladder Nut. 

 SEEDS. 

 CUTTINGS. Young growth placed under glass, or store dormant wood 



in moss and given bottom heat in March. 

 ROOT CUTTINGS. Use the larger roots. 



STEPHANANDRA. 



* CUTTINGS. Green wood used mostly. 



ROOT CUTTINGS. S. incisa (flexuosa) especially. Make cuttings in 

 Spring. Give bottom heat. 



STERCULIA. Japan Varnish Tree. Chinese Parasol Tree. 

 SEEDS. Easily grown if they can be obtained. 

 CUTTINGS. Soft wood rooted in Summer. 

 LAYERS. 



STEWARTIA. 



*SEEDS. Produced abundantly. 



CUTTINGS. Difficult to root. Use half-ripened ones. 



*LAYERS. Best method. Keep plants low for this. 



STIGMAPHYLLON. 



CUTTINGS. Soft wood heel cuttings rooted with bottom heat. 



STUARTIA. (See Stewartia.) 



STYRAX. Storax. 



SEEDS. Produced in profusion. Sow as soon as ripe. 

 CUTTINGS. Do not root well. 

 LAYERS. Useful. 

 GRAFTING. Sometimes grafted on Halesia Carolina. 



SYMPHORICARPOS. Indian Currant. Snowberry. 

 SEEDS. Easy. 



*GUTTINGS. Hard wood and green wood. 

 *UNDERGROUND STEMS. Spread quickly. 

 SUCKERS. Produced abundantly. 



SYMPLOCOS. Sweet Leaf. Horse-Sugar. 



SEEDS. Rarely germinate until second year after planting. 

 CUTTINGS. Under glass. Green wood. 

 SYRINGA. Lilac. 



SEEDS. Raise seedlings for budding. Easily grown. 

 *GUTTINGS. Green wood in Spring. Place in greenhouse. Good 

 plants are produced by Autumn. Hard wood cuttings are very 

 easily rooted. 



