Poinsettia—calendarial directions, i, 9, 13, 
15, 16; descript., cult., and illust. Bp ads 
489, 490. 
Polar nuclei—formation and fertilization 
of, 1, 53, 54- 
Polemonium-—species, &c., descript. and 
cult., 1, 370; P. coeruleum for summer- 
bedding, 1, 636. 
Pollen-cells—formation of (illust.), i, 
52; 53- 
ss , —formation of, i, 30, 48, 51 
(illust.), ; distribution by wind, in- 
sects, oe , 54; illust. of bees and 
flowers, and oe magnified pollen-grains, 
1, 59; removal of, hybridization process, 
1, 59, 60, 62. (See also title Pollination. ) 
Pollen-masses in orchids— removal of 
(illust.), 1, 62. 
Pollen-tubes—course of and the fertiliza- 
tion of the ovule (illusts. ), i, 52, 53, 60. 
Pollination—process of (illust.), i, 53, 54, 
60, without aid of fertilization, 1, 60; 
interpollination of fruits, influence of 
foreign pollen on formation of fruit, 
li, 49; report on pollination of pom- 
aceous fruits, il, 123, 124. 
Polyanthus—calendarial directions, i, 5, 6, 
Ir, 13; relationship, &c., between 
powell, true primrose, and polyanthus, 
i, 490, 491; descript. and cult. of gar- 
den plants, 1, 491; spring - bedding 
plants, 1, 630. 
Polybotrya—(see Acrostichum). : 
Polydesmus complanatus—(illust.), de- 
script. and remedies, 1, 106. 
eee descript. and cult. of hardy shrub 
P. Chamzbuxus, 1, 313, of greenhouse 
species, i, 541. 
Polygonatum—calendarial directions, i, 3, 
17, 18; species, &c., descript. of, i, 370, 
for forcing, i 1, 627. 
Polygonum —descript. and cult. of hardy 
eeran shrub P. Baldschuanicum, 
313, of hardy perennial species, &c., 
: 370, of bog or marsh plants, i 1, 386. 
Polypodium—decorative ferns, i, 584; de- 
script. and cult. of stove and green- 
house species (illust.), i, 598, 599, of 
hardy fern species, &c. (illust.), 1, 607. 
Polystichum-—species, &c., descript. of, i, 
599- 
Pomalo—(see title Oranges, Lemons, &c.). 
Pomegranate—descript. and cult., i, 314, 
in greenhouse, i, 541. 
Ponds as water-gardens — (see titles 
Ornamental Water, Water-garden). 
Pontederia—species, &c., descript., cult., 
and illust., i, 383, 384. 
Poplar-trees—descript. and cult., i, 313, 
314, use of as shelter-belts, &c., ii, 10, 
33, 76. 
Poppies—descript. and cult. of annual vars., 
&c., 1, 397, of Californian poppy, 1, 397; 
illust. of Iceland poppies, 1, 648. 
Poppy anemone—descript. and cult., i, 
4ol. 
Poppy mallow—descript. and cult., i, 352. 
Poppy worts—descript. and cult. of, i, 375. 
Popular garden plants—descripts. and 
illusts., 1, 400-523. (For particular 
plant, see its title.) 
Populus—species, &c., 
1, 313, 314. 
Porcellio scaber—iillust.), 
treatment, 1, 99. 
Porcupine quill rush—descript. and cult., 
i, 386. 
Porthesia auriflua—descript. and treat- 
ment, i, 99. 
Porthesia chrysorrhcea—descript. 
treatment, 1, 81. 
Portland cement for walks, &c.—use of, 
i, 275 31. 
Portulaca oleracea — (illust.), descript., 
uses, and cult., 11, 503. 
Portulacca—descript. and cult., i, 397. 
Posoqueria—descript. and cult., i, 554. 
Pot-herb moth — (illust.),: descript. 
treatment, i, 108, 109. 
Pot marigold—descript. and cult. of, i, 380. 
VoL II. 
51> 
descript. and cult., 
descript. and 
and 
and 
INDEX. 
Potash—presence of in soil, i, 134; manurial 
use of in leaf-mould, i, 138, as nei 
food and for vine culture, &c., 1, 140, 
168, 169; influence of potash on vege- 
table physiology, i, 169, 170; composi- 
tion and use of nitrate of potash, 1, 170. 
Potassium sulphide of sulphur—as a 
fungicide, il, 44. 
Potato-dibber—descript., 
1,177; M1, 405. 
Potato Disease— 
Descript., illust., and development of, i, 
128; li, 498, 499. 
Manure, influence on—results of manurial 
experiments on potatoes, 1, 172. 
Origin and date of appearance, ii, 498. 
Plants attacked by, i, 128; li, 498. 
Preventive means—use and composition of 
Bordeaux mixture, effect of spraying 
crops (illust.), and result of experi- 
ments, 1, 130; ii, 499, 500. 
Tomatoes affected by—treatment of, ii, 
338, 340, 498. 
Potatoes— 
Calendarial directions, 11, 532, 536, 539, 541, 
544, 546, 548, 552, 554; for forcing, i, 
534) 5375 539, 542- 
Crops potatoes may follow and be succeeded 
by, ll, 390. 
Cultivation and improvement of the potato 
in Europe—history and particulars as 
to, 11, 487-490. 
Descript. of formation, &c., i, 35; il, 487, 
489. 
ear oe Re and treatment of mould 
use, and illust., 
(sclerotia), i, 126, 127, curl and scab 
diseases, i, 498. "(See also title Potato 
Disease. ) 
Early crops—cultural directions, ii, 496. 
Forcing—directions for cult. in hot-bed, 
pit, pot, &c., descript. of mode used by 
London market-gardeners, ll, 497, 498. 
Foreign names of, 11, 528. 
Improvement and deterioration — condi- 
tions affecting, &c., li, 488, 489; raising 
seedlings, ii, 489 3 modern introduc- 
tions, ll, 490. 
Insect pests, ii, 498. (See also title Insect 
and other Plant Enemies. ) 
Lifting and storing-—time and modes, non- 
exposure to light, protection from 
frost, 11, 496, 497, 566. 
Lists (illusts.) of vars.—modern introduc- 
tions, ii, 490; for early, late, &c., crops, 
ll, 500-503. 
Manures—effect of mineral and _nitrogen- 
ous manures, 1, 145; results of manurial 
experiments with farmyard, artificial, 
&c., manures, i, 172; 11, 491; selection 
and application of various manures to 
suit dirferent soils, 11, 490-492. 
Packing—size of barrels, &c., in America, 
ii, 373; directions for, i, 566. 
Planting — periods for, li, 493; distances 
between rows and between sets, depth 
for sets and result of experiment, u, 
494; modes and appliances (illust.) for 
trench-planting, dibber-planting, be- 
tween ridges, 11, 494, 495. 
Potato sets—selection for propagation, il, 
492; directions for cutting, change of 
sets, and planting, il, 493-495. 
Preserving—drying process, il, 356. 
Propagation—methods, illust. of seedling, 
results of experiments, use of baskets 
(illust.), &c., 1, 492, 493. 
Protection from frost—method and mate- 
rials used, il, 497. 
Raising seedlings—method of, illusts. of 
seedlings, ii, aoe) 402: 
‘* Seed potatoes” and ‘‘ potato seeds” re- 
garded as synonymous terms—explan- 
ation as to, 1, 488. 
Soil suitable and preparation of ground, 
il, 490. 
Treatment after planting—subsequent cul- 
ture, earthing-up directions, &c., i, 
495» 496. 
Winter crops-—cultural directions, ii, 496. 
597 
Potentilla—hardy ornamental shrubs, de- 
script. of, i, 314; hardy perennial Be 
cies, &c., de escript. and cult., 1, 370 
Pots for plants—various furms 
and uses of, 1, pot protectors 
(illust. flats, 
i, 192. 
Poudrette—as a manure, i, 159. 
Poultry—as garden friends, i, 113. 
Poultry dung—as a manure, i, 160. 
Powder distributor — illust. and use of, 
1, 190. 
Prairie land—amounts of 
organic matter in, 1, 150. 
Preserving fruit—(see Fruit-preserving; 
special fruit, see its name). 
Prickly pear—descript. and cult. of plant, 
1, 620. 
Pride of California—descript. and cult. 
of, 1, 537- 
Primrose-—descript. and cult. of evening, 
i, 367, 396, of bog plants. i, 336; relation- 
ship, &c., between cowslip, poly aaes 
and true primrose, i, 490, 491; descript. 
and cult. of Primula rales ae 1, 499, 
illust. of var., i, 491; spring-bedding 
forms, 1, 630. (See also Tree primrose. ) 
Primula—calendarial directions, i, 4, 11, 12, 
14,18; perennial species, &c. —descript., 
cult., and illusts., i, 371, bog plants, i, 
386, spring- -bedding plants, 1,630. (See 
also titles Auricula, Primrose, Poly- 
anthus, Primula sinensis. 
Primula sinensis (Chinese primula) — 
calendarial directions, 1, 8; descript., 
origin, illust., and cult., 1, 491, 492; 
Birmingham strain, treatment of, 1, 492. 
Prince’s feather—descript. and culf., i, 389. 
Prinos glaber, P..verticillata—descript. 
Off; 314. 
Pritchardia—descript. and cult., i, 611. 
Privet shrubs—descript. and cult., i, 307, 
for winter-bedding, i, 647. 
Propagating knife—illust. and use of, i, 
178. 
illusts. 
1go-192, 
jy i, Igl, 192; Saucers ana 
and 
nitrogen 
Propagating pit — (illust.), construction 
and uses of, i, 204, 205. 
Propagation— 
Appliances—use of bell-glasses, &c., 
235- 
Bhi cheap ate and modes of (illust.), 
i, 242-245. 
Bulbs, corms, and tubers—propagation by, 
i, 227. 
Gittins -oipacution by (see Cuttings). 
Diseased plants—avoidance of, i, 124. 
Division—propagation by, i, 227. 
Grafting (see that title). 
Inarching mode and modifications (illust.), 
1, 245-247. 
Layers, propagation by—illust. and de- 
script. of modes of layering, 1, 229-231. 
Leaves—propagation by, i, 235. 
Roots—propagation by, i, 236. 
Runners—propagation by, i, 228. 
Seeds—propagation by (see Seeds). 
Suckers—propagation by, i, 228. 
Trees and shrubs, hardy ornamental—effect 
of propagation, i, 285. 
Vegetative propagation—power of plants, 
1, 53- 
[See also names of fruits and generic titles 
of plants. J 
Protea-—species, &c., descript., 
illust., 1, 541. 
Proteids—as plant-food, i, 44. 
Prothallus-—formation (iNust.) 
i, 64, 65. 
Protoplasm—formation of (illust.), i, 27; 
continuity of (illust.), 1, 31; nitrogen 
essential to life of, i, 43; fusion oi male 
and female particles of, 1, 48, 53: illust. 
of changes in protoplasm of the cel!- 
nucleus, i, 56. 
Prumnopitys elegans—descript. of, i, 332, 
RUSS Tomas , &c., descript. andi cult. 
is 371: 
Prunes, dried—vars. suitable, ii, 15 
361; process of drying, i, = 3-3 
80 
i, 178, 
cult., and 
and uses of, 
