INDEX. 
277 
production of, 35 ; the most rapid radiators I 
of heat, 86 
Food of plants prepared and supplied by heat, 34 j 
Forcing flowers, hints on, 24 
Forests, manner in which they affect the climate j 
of any district, 204 
Frames, advantages of growing greenhouse plants 
in, 201 ; excellent method of elevating, 264 
Frost, mode in which it operates on plants, 87 ; 
means for counteracting its effects, 87 ; reason 
for its destructiveness of vegetation in spring, 
86 ; the growth and decay of vegetable mat- 
ters suspended by it, 34 
Fuchsia cylindracea, well adapted for hybridiza- 
tion, 17 
Fuchsia fulgens, suggestions for treating it as 
Dahlias usually are, 46 ; further remarks on 
its culture, 273 
Fuchsia globosa ; var. Devonia, 237 
Functions of plants materially affected by heat, 
84. 
G. 
Galactodendron utile, 113 
Gardeners, mental improvement of, 207, 230 
Garden- mats, advantages of covering plant- 
houses with them in winter, 24, 274 
Gardoquia multiflora, 223 ; cultivation of, 224 
Gastrochilus pulcherrimus, 213 
Gentiana gelida, 189 
Geranium tuberosum ; var. ramosum, 41 
Gerardia delphinifolia, 165 
Germination of seeds, agency of heat in the, 85 
Gesneria Douglasii ; var. verticillata, 29 
— Marchii, 186 
■ — oblongata, treatment of, 104 
— stricta, 163 
— treatment of the genus, 30 
Gladioli, an open border most suitable for, 100 
Gladiolus ramosus, 99 
Glass, radiating and conducting power of, 37 ; 
its relative capacity for transmitting light and 
heat, when coloured and when transparent, 11 
Gompholobium polymorphum, treatment of, 
151 ; notice of two varieties, 116 
Gompholobium versicolor, 186 
Grafting Camellias, Rhododendrons, &c, 93, 
111 
Grafting trees, advantages of, 65 
Grammatophyllum rnultiflorum, 217; culture 
of, 218 
Greenhouse climbing plants, the partial acclima- 
tation of, 159, 249 
Greenhouse plants, remarks on exposing them 
during the summer, 119 ; method of inducing 
them to flower freely, 156 
Greenhouses, substitution in them of thin can- 
vass for glass during fine weather, 202 ; only 
calculated for display, 201 
Grevillea Manglesii, 44 
Griffmia hyacinthina, 44 
Growth of plants, a result of the application of 
heat, 33, 34, 84 ; a distinct process from the 
production of flowers, 132 ; why, when luxu- 
riant, it is inimical to fertility, 133 
Gun ma picta, 92 
H. 
Habits of plants susceptible of alteration, 84, 
158 
Half-hardy plants, merits of, 55 ; time for re- 
potting those that are exposed, 215 
Hawthorn hedges, recommendation to graft the 
more ornate kinds of Cratsegus upon, 65 
Heat, its influence on vegetable life, functions, 
and substances, 33, 59, 107, 132, 155, 181, 
204 ; suppositions as to its nature, 33 ; its 
expansive power, 34 ; perfectly imponderous, 
34 ; its sources, 36 ; its agency in the geo- 
graphical distribution of plants, 59 ; its modi- 
fication by elevated tracts or large bodies of 
water, 181 ; also by trees and forests, 204 
Heath, superb three-coloured, 3 
Hederoma latifolia, 259 
Hemerocallis speciosa, 214 
Herbaceous plants, effects of frost on such as are 
planted in autumn, 24 
Heterotropa asaroides, 185 
Hibiscus Cameronii, 237 
Hills, cases in which they are suitable or unsuit- 
able for planting tender species upon, 182 
Hoitzia Mexicana, 261 
Hovea fungens, 71, 101 
— treatment of the genus, 102 
Hoya coriacea, 89 
Huntleya meleagris, 69 
— violacea, 141 
Hybridization of ornamental trees, its import- 
ance, 65 
Hybridization of half-hardy plants, hints on the, 
192 
I. 
Ice, a result of radiation, 35 
Importation of plants, suggestions respecting 
the, 6 1 
Imported seeds, directions for the germination 
and subsequent management of, 62 
Indusium of plants, nature of the, 58 
Inga Harrisii, 185 
Insects, a knowledge of their forms and habits 
useful to gardeners, 231 
Ipomoea Leari, 237 ; culture of, 268 
— pungens, 261 
— rubro-coerulea, distinction between it 
and I. Leari, 267 
J. 
Jacksonia grandiflora, 237 
K. 
Knight, T. A., Esq., extracts of a letter from, 
on the course of sap, 9 
L. 
L<£Lia albida, 235 
— anceps, 22 
