LIST OF GREENHOUSE SHRUBS. 
183 
one of these plants with a fine straight stem upwards of twenty feet high, as some 
of the plants at Chatsworth are, and forming- a large spreading- head, the branches 
gracefully drooping, and shining with rich pendent scarlet blossoms ; the beauties of 
which are seen to the greatest advantage, from the circumstance of the spectator 
viewing them from beneath. 
12. In training, the following rule must not be lost sight of, viz. ; never to 
strip more than two thirds of the leaves from the stem until the plant has risen to 
its intended height and has formed a head ; the reasonableness of this will be 
immediately seen, when it is remembered that plants breathe chiefly by means of 
their leaves : the removal of too many at once will check the growth of the plant 
and cause it to sicken, and^ if persevered in, certainly die. 
GOMPHOLOBIUM. 
All the species of Gompholohium thrive in sandy heath mould and a little loam ; 
they require similar treatment to Elychrysum and other delicate plants of the same 
habit ; if either overwatered or allowed to become too dry, they quickly perish. 
Cuttings of the tender wood, planted in pots of fine sand, covered with a glass, and 
treated like those of Erica, will speedily strike root. 
GARDOQUIA. 
G. HooKERi. This very beautiful little plant is rather scarce, and considered 
somewhat difficult to keep. The best soil for it is a mixture of three parts very 
sandy heath mould and one part light sandy loam. Whilst the plants are young, 
it is necessary to place them in a brisk heat to keep them growing ; for if, whilst 
small, they are stopped in their growth and prematurely thrown into flower, they 
rarely come to any perfection afterwards. They may be propagated by cuttings of 
the young wood planted in sand, under a glass in heat ; but the best way of propa- 
gation is by seeds, which are usually produced, and should be sown early in spring. 
HOVEA. 
All the species named in the above list are so beautiful that they ought to be 
in every collection of plants ; they are liable, however, to perish suddenly when 
grown in pots, but they flourish remarkably planted out in the border of a con- 
servatory. They are somewhat difficult to propagate. Cuttings of the young 
wood, planted in sand, and covered with a glass, will strike root, provided they be 
not exposed to a moist heat, which takes them off immediately ; they also produce 
seeds, which should be sown as soon as ripe. 
HAKEA. 
H. LINEARIS. A beautiful white flowering plant; the sort of soil most 
suitable for it is, equal parts of pure sand, sandy heath mould, and leaf mould ; the 
pots must be well drained with potsherds, as the plants (whilst young, particularly) 
are very impatient of wet. Cuttings of the ripe wood, planted in the autumn in 
pot« of sand, covered with a glass, and placed in a cool dry part of the greenhouse, 
but by no means be plunged in a bottom heat. 
INDIGOFERA. 
Both the species mentioned in the list are nearly hardy, and may be planted 
* out in the open border, where they will flourish very well during the summer 
