SPIDERWORT STAPHYLEA. 321 



Spiderwort. See Tradescantia. 



Spinage (Spinacia oteracca}. Chenopodiacecz . 



Seeds, sown usually where the crop is to stand, either 

 in fall or spring. 



Spiraea (Spirea, Meadow-Sweet). Rosacecz. 



Seeds, sown as soon as ripe or stratified until spring. 

 Commonly increased by cuttings, either of mature or 

 green wood. Green cuttings usually make the best plants. 

 These are made in summer and handled in frames. Some 

 sorts, as 6". aritzfolia, S. opulifolia and varieties (Nine- 

 bark, now known as Neillia or Physocarpus opulifolia] 

 and S. prunifolia,) are usually grown from layers put 

 down in spring. The herbaceous kinds are often in- 

 creased by division. Plants forced in winter give excel- 

 lent cutting- wood, which should be taken when the 

 growth is completed. 



Spondias (Hog Plum, Otaheite Apple or Plum). Ana- 



cardiacetz. 



Seeds ; by large cuttings of growing wood, which 

 should be inserted in sand or mold, in heat. 



Spruce. See Picea and Abies. 



Squash (Cucurbita, three species). Cucurbitacea? . 



Seeds, when the weather becomes warm. 

 Squill. See Scilla. 



Stachys, Betonica, Galeopsis (Hedge Nettle, Woundwort). 

 Labiatce. 



Seeds, divisions, or cuttings. Some species (as the 

 Crosnes, Chorogi, or "S. luberifera" of recent introduc- 

 tion) are increased by subterranean tubers. 



Staff-tree. See Celastrus. 



Stanhopea. Orchidacece. 



Division of the old roots. See also under Orchids. 

 Stapelia (Carrion Flower). Asrclepiadacetz. 

 Seeds ; commonly by cuttings in heat. 

 Staphylea (Bladder-nut). Sapindace<z. 



Seeds, sown as soon as ripe or stratified until spring. 

 By suckers, layers, and cuttings of roots or of mature 

 wood, 



