350 THE NURSERY-MANUAL 



Lime (Citrus aurantifolia) . Rutacece. (H. H. Hume.) 



Trees produced from seeds vary in size, quality of fruit and 

 productiveness, and to produce trees true to type should be budded 

 on rough lemon or lime seedlings. See Orange. 



Limnanthemum : Nymphoides. 

 Limnobium. Hydrocharitacece. 



Propagated by division of the runners. 

 Limnocharis. Butomaceos. 



Increases naturally by offsets or suckers from the flower-stem ; 

 also by seeds, sometimes self-sowing. 



Linaria. Scrophulariaceos. 



Annual species (or those treated as such) are readily raised from 

 seed, which, as they are small, are usually sown indoors and the 

 seedlings transplanted ; sometimes seeds are sown where the plants 

 are to grow. The perennials are usually increased by means of 

 division, but also by seeds when obtainable. 



Linum (Flax). Linaceas. 



Multiplied by seeds, the hardy species sown outdoors and the 

 tender ones under glass. Cuttings may be taken from firm shoots 

 of the perennial species and inserted in sand under glass. The 

 ordinary flax (L. usitatissimum) is sown directly in the field, from 

 2 to 6 pecks of seed being used, depending on whether grown for 

 linseed or fiber. See Reinwardtia. 



Lippia. Verbenaceae. 



Usually increased by cuttings of young shoots under glass. 

 Cuttings of the hard wood may be used in autumn, under glass. 

 Also grown from seeds. The running kinds are increased by simple 

 division of the plants. The lemon verbena (L. citriodora, often 

 called aloysia) is grown quickly from cuttings taken from cut-back 

 stock plants in late winter or early spring ; such plants should be 

 of blooming size by summer. L. canescens is now much used as a 

 ground cover or lawn plant in California and elsewhere (under the 

 name Lippia repens). It is a creeping perennial, rarely producing 

 seeds. Propagated by sods cut to 2 inches square and planted a 

 foot or two apart. 



Liquidambar (Sweet Gum). Hamamelidacece. 



Propagated by seeds, which should be stratified or sown as soon 

 as ripe. Many of the seeds may lie dormant until the second year. 



