LIST OF PLANTS 15s 
CENOTHERA.—Plants of this genus, consisting of 
annuals, biennials, and herbaceous perennials, including 
those called in gardens Godetias, are among the showiest 
of hardy border flowers. The annual sorts can be raised 
from seed sown in April where they are to flower, and 
the biennials a little later for flowering the following 
year. The perennials are increased without difficulty by 
seed, by rooted suckers, and by cuttings of young shoots 
under a handlight in spring. 
OveEarRIA.—These flowering shrubs, of which O. 
Haastii, the Daisy-bush of New Zealand, is a well- 
known example, are increased in September by cutting's 
of half-ripened shoots inserted in sandy soil under hand- 
lights or in a cold frame, with shade, until rooted. 
Layering is also practised by pegging tongued shoots 
down in autumn. 
OMPHALODES (VENUS’S NAVELWORT).—Propagate by 
sowing seed in April and by dividing the roots of 
perennial sorts in autumn and spring. 
Onton.—-The main crop should be sown during dry 
weather in March by making shallow drills 1 foot apart 
and thinly covering with fine soil, which, if light and 
dry, should be made firm by treading or rolling. Another 
sowing is made in August in rather deeper drills to 
provide the winter or spring Onions.  Silver-skinned 
sorts for pickling may be sown rather thickly, broad- 
cast, in April. Small bulbs being preferred for this 
purpose, they need not be thinned. Potato or Under- 
ground Onions, largely grown by cottagers, are planted 
shallow (about half their depth) in February, 10 inches 
apart, in rows 15 inches asunder. They produce a good 
crop of offsets fit to harvest early in September. 
Opuiopocon.——The variegated varieties so much used 
