THE NURSERY-LIST 415 



Sagittaria (Arrowhead). Alismacece. 



Propagated by division, and sometimes by seeds. Some of the 

 species produce underground tubers that may be used for propaga- 

 tion. 



Saintpaulia. Gesneriacece. 



Grown easily from seeds. Also from leaf- cuttings taken the end 

 of March and inserted in sand bed, covering only small part of 

 leaf-blade. Sand should not be kept too wet. Handled like 

 sinningia (gloxinia) except that it is not tuber-bearing. See Gesne- 

 riacece, page 318. 



Salix (Willow. Osier). Salicaccoe. 



All the willows grow readily from cuttings of ripe wood of almost 

 any age. Cuttings are usually taken in autumn ; they may be put 

 in the ground at once or cellared until spring. The low and weeping 

 varieties are top-worked on any common upright stocks. Kilmar- 

 nock (weeping form of Salix Caprea), Rosmarinifolia (S. incana), 

 and other named varieties are worked on cutting-grown stocks of 

 S. Caprea. Seeds planted as soon as the capsule opens may also be 

 employed ; if sown on moss in pans or boxes and not covered, they 

 germinate readily and soon make good plants. 



Salpichroa. Solanacece. 



Increased by cuttings of half-ripened shoots in sand, under bell- 

 glass ; also by seeds when obtainable. 



Salpiglossis. Solanaceoe. 



Propagated by seeds in open air, or in the North they should be 

 started under glass in spring. 



Salsify (Vegetable Oyster) , Tragopogon porrifolius. Composite. 



Raised from seeds, sown in spring where the plants are to remain ; 

 hardy ; plants may remain in ground all winter. See also Scolymus, 

 Scorzonera. 



Salvia. Labiatce. 



Increased by seeds, usually started indoors ; also by soft cuttings 

 under glass. The common scarlet sage (S. splendens) although 

 perennial is treated as annual ; seeds started under glass or in a 

 window in spring produce fine subjects for late summer and fall. 

 Some of the salvias are annuals. For S. officinalis, see Sage. 



