136 PLANT PROPAGATION — 
produce abundant growths suitable for the purpose if 
given a little more heat and moisture in early spring. 
Ir1s.—This is an exceedingly large genus containing 
many very beautiful species. We may divide them 
broadly into two groups: those with bulbous and those 
with rhizomatous roots. The first are increased by 
offsets from the old bulbs taken off and planted just 
before growth commences, also by seed sown, when ripe, 
in pans or boxes of sandy soil placed in a cold frame. 
The latter germinate the following spring, but three 
years must elapse before flowers can be expected. The 
rhizomatous section are increased by division and by 
cutting up the creeping stems. (See illustration, p. 17.) 
Ix1As.—-Propagation by offsets taken from the old 
bulbs is the quickest means, as the plants then generally 
flower the second year, whereas seedlings, although easy 
enough to raise, take three or four years to develop into 
flowering bulbs. 
Ixora.—Short-jointed and moderately firm young 
shoots make suitable cuttings, which, if planted singly 
in small pots of peat, leaf-mould, and sand, and plunged 
in a bottom heat of 80 degrees in a close case and 
shaded, soon root. 
JAcARANDA.—The Mimosa-leaved species make very 
pretty plants when grown on a single stem. Propagate 
by cuttings taken from about half-ripened shoots, in- 
serted in a layer of sand over sandy peat in a close, 
moist heat during summer, with shade from sun. 
JacosiniA.—All these pretty stove flowering plants 
strike freely from cuttings of young shoots, which are 
usually obtained from old cut-back plants in early spring 
and‘inserted in a compost of leaf-mould, peat, and sand 
in brisk heat under bell-glasses. 
JAsmMinuM.—The stove and greenhouse kinds are in- 
