140 PLANT PROPAGATION 
raised from seed sown out of doors in autumn or spring ; 
the perennials also by cuttings for retaining the charac- 
ters of special varieties. 
LreeK.—For an early crop sow seed in a frame in 
February. The main crop for general use should be 
sown out of doors about the middle of March. 
Leonotis “(Lion’s Tatt).—The pretty L. leonurus 
should be raised from cuttings in gentle bottom heat in 
a close frame early in spring. 
LEONTOPODIUM (Edelweiss).—Propagate by division in 
April or May or by seed sown in fine loam mixed with 
small granite chips in a dry, sheltered place in autumn. 
LESCHENAULTIA.—L. biloba major is one of the finest 
of blue-flowered greenhouse shrubs in cultivation when 
treated with special care not to injure roots in repotting 
and to water with caution, using rain water only. 
Points of young shoots moderately firm should be in- 
serted in pots of sand in early spring and covered with 
a bell-glass in the gentle heat of an intermediate house. 
Lettuce.—-Without doubt this is the most popular 
and extensively used of salad vegetables. For summer 
crops the seed is sown under glass in January and 
February. In March and onwards at intervals of two 
or three weeks until August, outdoor sowing's are made 
for successions. For winter Lettuce only hardy varie- 
ties for growing in frames and sheltered positions are 
selected, these being sown in August. 
LEUCADENDRON (SILVER TREE).—The dried, silvery 
leaves of L. argenteum are imported from the Cape of 
Good Hope in considerable quantities for ornamental 
purposes and for wreath-making. Small specimens will 
grow in an ordinary greenhouse and may be propagated 
by cuttings under bell-glass in spring. 
