426 THE NURSERY-MANUAL 



Strelitzia (Bird-of-Paradise Flower). Musacece. 



Grown by seeds, which usually are produced only when flowers 

 are artificially pollinated ; more commonly by suckers, and some- 

 times by division of the plant. 



Streptocarpus (Cape Primrose). Gesneriacece. 



Readily propagated by seeds and by division; also by leaf- 

 cuttings. Seeds should not be covered too deep, and put in open 

 sunny place in intermediate temperature. See Gesneriacece, page 318. 



Streptosolen. Solanacece. 



Propagated by cuttings, much as for geraniums. 



Strobilanthes, including Goldfussia. Acanthacece. 



Increased by seeds and cuttings, the latter taken of green wood 

 and started under glass. 



Styrax (Storax). Styracacece. 



Raised from seeds, which must be stratified, or else sown as soon 

 as ripe. They usually lie dormant the first year, Also increased by 

 layers and some species by cuttings of green wood. They can be 

 grafted on other storaxes, or on Halesia Carolina. 



Sugar-Cane (Saccharumofficinarum). Graminece. 



Increased by cuttings of the stems. The cuttings should have a 

 node or joint which bears one or more good buds. These cuttings 

 are planted directly in the field, and the plants will reach maturity 

 in two or three months. Propagation by seeds was once supposed 

 to be impossible, but it is now so raised in Cuba, and in the British 

 West Indies, where the plant produces seed. 



Sunflower (Helianthus sp.). Composites. 



The common garden and field sunflower is raised from seeds 

 planted where the plant is to grow. Perennials are also grown from 

 seeds as well as by division. Some species increase naturally by 

 rhizomes and tubers. See Helianthus; also Artichoke (Jerusalem). 



Swainsona. Leguminosce. 



Propagated by cuttings ; those taken in late winter bloom in sum- 

 mer ; for winter bloom cuttings may be made in spring and summer. 



Sweet Pea (Lathy rus odoratus). Leguminosce. 



Raised from seed, sown either in fall or spring where the plants 

 are to be grown, or rarely in pots and transplanted to the open for 

 early bloom or special varieties. For winter blooming under glass a 



