LIST OF PLANTS 131 
HELLEBORUS (CHRISTMAS ROSE AND LENTEN ROSE).— 
Increase by carefully dividing the roots in July. Seed 
sown as soon as ripe will grow, but this is a slow 
method of propagation not often resorted to. 
HEMEROCALLIS (Day Lity).—Although the individual 
blossoms are of short duration, they are freely and 
successively produced. Propagation is effected by 
division of the roots in March. 
HERACLEUM.—These giant and somewhat coarse- 
growing plants are useful and effective in suitable 
positions in the wild garden and at the waterside. 
They are easily raised from seed sown in March or by 
division in October or March. 
HeEsperis (Rocket). — H. tristis (Night-scented 
Rocket) and the single Rockets can be easily raised by 
sowing seed in sunny positions outdoors in April; the 
double varieties of H. matronalis by cuttings put under 
handlights in shady border in September or October. 
HeEucHERA (ALumM Roort).-—The desirable species, 
H. sanguinea and its varieties, are propagated by 
dividing the crowns in spring. 
HisBBERTIA.—The most useful species, H. dentata, 
may be increased by cuttings of moderately firm shoots 
under a bell-glass in heat in spring and summer. 
Hisiscus.—The gorgeous and well-known H. rosa- 
sinensis and its varieties are propagated by inserting 
rather firm cuttings in a warm house and covering them 
with bell-glasses until rooted. 
HipPEASTRUM.—The named sorts are raised from off- 
sets carefully removed from old bulbs. Excellent results 
are also obtained by raising plants from seed of a good 
strain. It should be sown as soon as ripe in pots or 
shallow pans filled with a mixture of equal parts of loam 
