GENERAL INDEX. 
291 
for growing them in the open 
air, x. 240 
Hyacinth-pot, new, xii. 17 ; new 
method of fastening connected 
with, xii. 17 
Hybrid Correeas, xiv. 147 
Hybridisation, remarks on, v. 21 9 ; 
of half-hardy plants, hints on 
the, vi. 192 ; of ornamental trees, 
its importance, vi. 65 ; good con- 
sequences of, vii. 79 ; observa- 
tions on extending the practice 
to annuals, vii. 143 ; of native 
plants, remarks on the, ix. 87 ; 
for improving their properties, 
ix. 87 ; for rendering delicate 
species more hardy, ix. 87 ; 
theory of, xi. 202, xiv. 147 
Hybrid plants, injudiciousness of 
applying names to them unless 
they are distinct, vii. 3 ; com- 
monly require much pruning, 
vii. 1 1 ; readily obtained between 
species of allied genera,, vii. 51 ; 
justness of allowing the gar- 
deners who raise them part of 
the profits derived from their 
sale, vii. 196 
Hydrangea hortensis, culture of, 
iii. 13, 144, 192 ; hints on water- 
ing, v. 120 ; hortensis, its treat- 
ment as a border flower, ix. 40 ; 
on disbudding, x. 61 ; hortensis, 
probable cause of the change of 
colour in the flowers of, x. 177, 
225 ; japonica, x. 119 ; horten- 
sis, suitable for planting in 
groups, xi. 138; japonica, xi. 
262 ; several species of, xi. 262; 
japonica, xii. 119 ; japan, xii. 
119; japonica, var. cserulea, xiii. 
212 ; the blue, xiii. 109 ; azisai, 
xiv. 165 ; japonica variety, xiv. 
141 
Hydrogen gas, characteristics of, 
ix. 227 
Hydrolea spinosa, xii. 142, xv. 258; 
spinosa, xiii. 247; its suitability 
for the flower-garden, xiii. 247 ; 
spiny, xiii. 247; triyyna, xiii. 
247 
Hydrotsenia meleagris, ix. 165 
Hylotoma pilicornis, xiv. 7 0 ; rosse, 
xiv. 71 
Hymemea Courbaril, v. 236 
Hymenoxys calif ornica, vii. 235 
Hypericum calycinum, well fitted 
for planting in groups, ix. 234 ; 
for shrubberies, xii. 60 ; for 
covering banks, xii. 62 
Hypnum proliferum, xii. 160 
Hypocalymma robustum, x. 68, xv. 
239 
Hypocalyptus obcordatus, viii. 212 
Hypocyrta strigillosa, x. 238 ; 
discolor, xii. 142, xiii. 68; stri- 
gillosa, xiii. 117; leucostoma, 
xiv. 164 
Hypsela, xv. 9 
Hyssop of the ancients, xv. 252 
Hyssopus orientalis, xv. 252 ; offi- 
cinalis angustifolius, xv. 254 ; 
caucasica, xv. 254 
I. 
Ice, a result of radiation, vi. 35 
Illicium floridanum, hints on, iii. 
63 ; anisatum, iii. 63 ; parvi- 
florum, iii. 63, 192 ; floridanum, 
v. 147 ; religiosum, ix. 213 
Illustration, highly useful in bota- 
nical pursuits, vii. 36 
Impatiens scapiflora, iv. 163, 237, 
v. 101, 238 ; glanduligera, vii. 
90, 214 ; macrochila, vii. 41 ; 
tricornis, vii. 42 ; Candida, viii. 
93 ; rosea, viii. 117 ; platype- 
tala, xiv. 20 ; repens, xv. 239 
Importance of early planting, iii. 9 
Importation of plants, suggestions 
respecting the, vi. 61 
Imported seeds, directions for the 
germination and subsequent ma- 
nagement of, vi. 62 
Impregnation, iii. 120 ; philoso- 
phy of the process of, ix. 9 ; of 
seeds, philosophy of the, xi. 202 
Improvement in the construction 
of forcing-houses, iii. 157 ; in 
gardens, advantages of designing 
them in the early part of the 
autumn, v. 191 
India, preparation and manage- 
ment of plants during a voyage 
from, i. 263 
Indian azaleas, different ways of 
treating, xi. 160 
Indian cress, Mr. Moritz's, viii. 
199 ; edible rooted, ix. 127 : 
azure-flowered, ix. 247 ; many- 
leaved, x. 175 ; Mr. Lobb's, xi. 
271 ; showy, xiv. 173 
Indian daffodil, i. 149 
Indigenous plants, methods of im- 
proving, ix. 84 ; by soil, ix. 85 ; 
by yearly shifting and division, 
ix. 86 ; by hybridisation or seeds, 
ix. 87 
Indigofera, ii. 228; Dosua, ix. 239 ; 
stachyoides, x. 69 ; decora, xii. 
214, xiv. 240, xv. 257 
Indusium of plants, nature of the, 
vi. 58 ; difference between the 
part so called by Mr. Main, and 
that of the majority of botanists, 
vii. 257 
Inflorescence, various forms of, vii. 
1 19, 161 ; structure and economy 
of, xi. 201 
Inga pulcherrima, xi. 147 -, suitable 
mode of culture, xi. 148 ; sensi- 
tive properties of the leases of, 
xi. 148 ; Harrisii, vi. 185 
Insects, a knowledge of their forms 
and habits useful to gardeners, 
vi. 231 ; injury done to leaves 
by, ii. 40, iii. 120 ; which infest 
stove plants, modes of destroy- 
ing them, v. 71 ; necessity for 
timely destroying, ix. 192 ; infest- 
ing flowers, xiv. 167, 179, xv. 
168 
Iochroma tubulosa, xii. 92 
Iodine, effects of, on seeds, ii. 114 
Ionopsis tenera, iv. 18 ; utriculari- 
oides, v. 21 1 
Ipomcea, ii. 107, 109 ; rubra cseru- 
lea, iii. 99 ; Horsfallice, iii. 50 ; 
iv. 70, 94; bonariensis, v. 161 ; 
platensis, v. 234; Leari, vi. 237 ; 
culture of, vi. 268 ; pungens, vi. 
261 ; rubro-cserulea, distinction 
between it and I. Leari, vi. 267; 
longifolia, vii. 90 ; batatoides, 
viii. 163 ; ficifolia, viii. 68, 238 ; 
Hardingii, viii. 142; Leari, prin- 
cipal points of the growth of, 
viii. 204 ; tyrianthina, viii. 73, 
263 ; its culture, viii. 74 ; ficifo- 
lia, ix. 25 ; plan of treating, ix. 
26; rubro-cserulea, var. ix. 117; 
Tweedieii, xi. 261 ; cymosa, x. 
117 ; Leari, excellent mode of 
propagating, x. 185 ; crassipes, 
xi. 43 ; Hardingii, xi. 217 ; how 
to obtain good specimens of, xi. 
218; Krusensterni, xi. 213; 
macrorhiza, xiv. 67 ; muricata, 
xiv. 116 ; pulchella ; xiv. 140 
Ipornopsis elegans, i. 27 ; picta, i. 
245 ; culture of the genus, i. 28; 
elegans, ii. 168, 216 ; picta, ii. 
168, 216 ; elegans, culture of, 
iv. 24, 96, 229 
Iris bifolia, i. 245 ; culture of the 
genus Iris, i. 82 ; uses of, i. 83 ; 
alata, iii. 215 ; chinensis, iv. 71 ; 
fragrans, vii. 18 ; bicolor, vii. 
214, ix. 29 ; culture of, ix. 30 ; 
persica, x. 77 ; how to grow, x. 
78 ; imbricata, xii. 164 ; setosa, 
xiv. 67 ; aurea, xiv. 272, xv. 
234 
Irish Farmers' and Gardeners' 
Magazine, noticed, ii. 148 
Iron inferior to wood for the roofs 
of plant-houses, v. 34 ; its pre- 
sence in soils made known by 
the action of fire, vii. 251; in 
heath-soil, not injurious to plants, 
viii. 84 
Irritability of plants, i. 31, 54 
Ismelia Madeirensis, iii. 213 
Ismene Amancaes, iii. 267 ; Aman- 
caes sulphurea, i. 96 ; Macleana, 
v. 210 ; virescens, viii. 43 
Isochilus carnosaeflora, xi. 213 ; 
carnosiflorus, xii. 263 
Isolated trees, hints on planting, 
viii. 159 
Isomeris arborea, viii. 20 
Isopogon Baxteri, iv. 20 ; scabra, 
x,213, xiv. 258 
Isotoma axillaris, iii. 48, xv. 9 ; 
breviflora, xv. 9 ; longiflora, 
xv. 8 
Ivy, beauty and use of, ii. 185 ; 
remarks on growing it in de- 
tached specimens upon lawns, 
and on its various uses, x. 1 6 
