92 PLANT PROPAGATION 
morning to prevent too great an accumulation of 
moisture. Layering also succeeds. 
Bocconia.—Cuttings of side-shoots will root under 
bell-glasses in a temperature of 55 degrees. Suckers 
and division are other means much resorted to. 
BoraGE (Borago officinalis).—Seed of this herb (used 
in beverages and a good bee-flower) should be sown in a 
sunny position in March. 
BorecoLe.—Both the culinary and the ornamental 
foliaged sorts should be sown at the end of March, or in 
April for the main crop. — 
Boronia.—The species of this genus of greenhouse 
plants, esteemed for their handsome or their sweet- 
scented flowers, require care in their propagation. Cut- 
tings of rather firm young shoots should be inserted in 
a compost of loam, peat, and sand, surfaced with a thin 
layer of- pure sand and covered with a bell-glass, with 
careful watering, in a cool house. 
BOuGAINVILLEA.—These can be raised from _ root- 
cuttings, but the usual course is to select short-jointed, 
half-ripened cuttings of side-shoots, taken off with a 
heel of the older wood, and to place them in a brisk 
bottom heat in a close, warm case. 
BouvarpD1IA.—Root-cuttings grow readily if inserted 
in pots with warmth in spring. Bouvardias are also 
extensively increased by cuttings of young shoots, 
2 inches long, which are obtained in plenty from old 
plants that have been cut back and encouraged to sprout 
with increased heat and moisture. It is not necessary 
to cut them at a joint. After inserting them in pots of 
compost with a layer of sand at the top, they are kept 
in a close, warm frame until rooted. 
BrRACHYCOME.—The Swan River Daisy is a popular 
