March.'] GREEN-HOUSE — REPOTTING. 285 
April, and be lifted in October. Keep them from frost. 
Thus treated, they are very desirable. (Soil No. 12.) 
Helychrysums, above forty species, chiefly belonging to the 
green-house — all everlasting flowers. H. grandljidrum, H. 
arboreum, H. frdgrans, H. adoratisslmum, U. frlitlcans, 
and H. fdlgidum, are all very esteemed species, mostly with 
soft downy foliage. The pots should be well drained, and 
the plants kept in an airy situation, as they suffer from the 
least damp. If the flowers are cut off before they fade, they 
will retain for many years all the splendour of their beauty; 
but if allowed to decay on the plant, they will soon become 
musty, and all their colour fade. (Soil No. 6.) 
Illbbertlas, about ten species. Three of them are known 
to be fine climbing evergreen shrubs, namely, H. glosmlar- 
ivefolia; H. dentata ; H. volubllls, if closely approached, has 
a disagreeable smell; H. fascicxdata, H. Saligna, and H. 
pedunadata, .are evergreen shrubs; they have pure yellow 
flowers of five petals, blooming from May to September. 
(Soil No. 12.) 
Hbveas, about eight species, pretty plants of New South 
Wales, blue pea-flowering evergreen shrubs ; the finest are 
H. panosa, H. atropurpurea, H. linearis, II. rosmarlnlfblla, 
II. longifblia, and II. Oelsll, which is the most superb, and 
flowers in abundance. They grow and flower freely; the pots 
should be drained. (Soil No. 6.) 
Hypericums, St. John's wort, about twenty species. A few 
of them are very showy, and with few exceptions have yellow 
flowers. II. muiiOgymnn, H. balearicum, H. florlbundum, 
H. canarlense, H. ccgyptiacum and II. cochlii-chlnense, which 
has scarlet flowers, are among the best, and all of them flower 
freely; five petals, filaments many in three or five parcels. 
They are all of very easy cultivation, and bloom generally 
from April to September. (Soil No. 11.) 
Hydrangea hortensls is a well-known plant, and much 
esteemed for its great profusion of very elegant, though mon- 
strous flowers. They are naturally of a pink colour, but 
under certain circumstances of culture they become blue. If 
grown in brown loam with a little sand, they will preserve 
their original colour ; but if grown in swamp earth with a 
little mould of decayed leaves, they will become blue.* 
* Mix the iron sparks from the blacksmith's shop with any kind 
of soil, and they will be a beautiful blue. One and a half quarts to 
a bushel will do. 
