616 
THE, DICTIONARY OF GARDENING, 
POPPY, MEXICAN. See Argemone. 
POPULUS. To the species and varieties described 
on pp. 200-1, Vol. III., the following should be added : 
P. alba macrophylla (large-leaved). A large-leaved form. 
P. a. nivea (snowy).* /. covered with white tomentum on the 
under-side. One of the most ornamental of the white-leaved 
Poplars. 
P. a. pyramidalis (pyramidal). The correct name of 
P. a. Balan: Syn. P. Korolkowi. 
P. angustifolia (narrow-leaved). J. ovate-lanceolate, narrowed 
to the base, Willow-like, acute, glabrous, crenate-serrate. 
Branchlets terete, glabrous. Otherwise like P. moniliformis 
(of which it has been classed as a variety). North America. 
SyN. P. salicifolia (of Rafinesque). 
P. balsamifera candicans variegata (variegated). /. large 
and showy, dark green, shaded with paler green, and heavily 
mottled and splashed with yellow. Syn. P. ontariensis 
variegata. 
P. Bolleana (Bolle’s). A synonym of P. alba pyramidalis. 
P. canadensis aurea Van Geertii (Van Geert’s golden). 
A synonym of P. deltoidea aurea. 
P. canescens. According to the Kew authorities, this is now 
classed as a species, and not as a variety of P. alba. 
P. deltoidea aurea (deltoid, golden). J. of a soft yellow, 
borne on bright red petioles, which impart a pleasing and 
distinct appearance, especially in autumn, when the colour 
deepens to orange. Young growths more or less touched with 
red. This variety is free in growth, and the foliage does not 
burn in hot summers. SYN. P. canadensis aurea Van Geertit. 
P. Eugenii (Eugene Simon’s). A garden variety of P. monilifera. 
P. Korolkowi (Korolkow’s). A synonym of P. alba 
pyramidalis. 
P. monilifera Eugenii (Eugene Simon’s). A tree of giant 
size. It ‘carries its limbs and shoots perpendicularly, 
forming a columnar head. It grows faster than other 
varieties, and is well adapted for planting as a solitary tree 
in parks or in groups. but not by roads or streets” (C. Mathieu, 
in R. G., Dec. 1, 1887). 
P. monticola (mountain-loving). A form of P. Tremula. 
P. ontariensis (Ontario). A synonym of P. balsamifera candi- 
cans. 
P. pyramidalis (pyramidal). A variety of P. nigra. 
P. salicifolia (Willow-leaved), of Rafinesque. A synonym of 
P. angustifolia. 
P. Steiniana (Stein’s). A garden hybrid, not in general 
cultivation. 1888. (R. G. 1888, p. 173, f. 37-8.) 
P. tomentosa is a variety of P. alba. . 
P. trichocarpa (hairy-fruited). . having the ovary densely 
tomentose. /. ovate-lanceolate, cordate at base, 8in. long, 5in. 
broad, serrated, glabrous, pale beneath; petioles about lin. 
long, marked with red. Branches divaricate, reddish when 
young. California. 
P. Viadri (Viadri’s). This is something in the way of P. nigra, 
but branches lower down the trunk; the leaves are more 
cordate and paler beneath, the branches are more curved and 
more branched, and the tree is more fertile. Germany, 1890. 
POROCARPUS. A synonym of Timonius (which 
see). 
PORPHYROSTACHYS. 
ptera (which see). 
PORRECT. Directed outwards or forwards. 
PORTEA. According to the latest classification, 
P. Legrelliana and P. tillandsioides are transferred to 
Ortgiesia (which see), under the same specific names. 
PORTENSCHLAGIA (named in honour of F..V. 
Portenschlag-Ledemmeyer, an Austrian botanist, who died 
in 1821). Orv. Umbellifere. A monotypic genus. The 
species is a tall, much-branched, hardy perennial, slightly 
pubescent or almost glabrous. It thrives in any good 
garden soil, and may be propagated by seeds or by 
divisions. 
P. ramosissima (much-branched). . yellowish-white, poly- 
gamous, produced in compound, many-rayed umbels ; involucral 
bracts numerous, often membranous at the margins; petals 
hairy. jr. shortly hairy. J. ternately to pinnately decompound; 
ultimate segments 4in. to lin. long, filiform. Dalmatia, 1888. 
PORTENSCHLAGIA (of Trattinick). Included 
under Elwodendron (which see). 
PORTULACA. To the species described on p. 202, 
Vol. III., the following should be added : 
P. grandiflora compacta (compact). Under this name is 
known a strain of compactly habited, brilliantly flowered 
varieties. 
A synonym of Steno- 
Portulaca—continued. 
P. g. Regeli (Regel’s). fl. of a peculiar salmon-buff tint, with 
a yellow centre, solitary. 1885. (R. G. 1209.) 
P. Thellusonii. The compilers of the “Index Kewensis” 
regard this as a distinct species. 
PORTULACARIA. This genus now embraces two 
species, but only one has been introduced to cultivation. 
POSOQUERIA. To the species described on p. 203, 
Vol. III., the following should be added. One or two 
plants formerly ineluded hereunder are now referred to 
Randia. 
P. latifolia (broad-leaved). The correct name of P. reroluta. 
P. macropus (large-footed).* jl. pure white, very sweet-scented, 
many in a corymb; corolla glabrous, the tube five times the 
length of the limb, the segments slightly acute. /. somewhat 
coriaceous, oblong, acute, rounded at base; petioles above lin. 
long; stipules long, triangular, membranous. Brazil, 1896. 
Plant slightly hairy. (B. M. 7467.) 
POSTERIOR. That side which adjoins the axis or 
main stem. 
POT. Sce Pots and Potting. 
POTHERBS. The cultivation of herbs is not so 
general as it should be, oras it was years ago. Usnally 
any out-of-the-way spot in the garden is devoted to their 
culture, and the consequence is that they are rarely seen 
in good form. While a very rich soil is not desirable, 
one that is fairly good is the best. To have the flavour 
of the herbs properly developed, the plants should have 
the benefit of all the sun and light possible. Many herbs 
are easily propagated by seeds, and answer best raised 
in that way—Basil, Borage, Chervil, Fennel, Marjoram, 
Pot Marigold, Parsley, Savory, and even Sage, for instance. 
A few that succeed best propagated by cuttings or 
division are Mint, Thyme, Chives, Tarragon, Sorrel, &c. 
POT MARIGOLD. See Calendula officinalis. 
POTATO. To the varieties described on pp. 209-10, 
Vol. IIIL., the following should be added : 
Kidney-Shaped. NINETY-FOLD, an early variety and immense 
cropper; flesh white and very floury when boiled. RELIANCE, 
a new mid-season or late variety, of beautiful shape, full eyes, 
and of fine table quality. RINGLEADER, probably the earliest 
Potato in cultivation; flesh white and of excellent quality 
immediately the tubers are large enough to use. SIR JOHN 
LLEWELYN, tubers large, handsome, white, very floury and 
of good flavour when boiled; eyes prominent; enormous 
cropper, and good disease-resister; a most promising new mid- 
season variety. SUPREME, a new variety of great promise, 
being large, handsome, a great cropper, and of excellent quality. 
THE BRUCE, somewhat after the form of MAGNUM BONUM; a 
eat cropper, fine quality, excellent disease-resister, and a long 
eeper. WINDSOR CASTLE, a popular variety of great merit; 
a great cropper, good keeper, handsome, and high quality. 
Round. Epicure, tubers large, white, and very floury when 
boiled; eyes shallow, and a great cropper; a mid-season 
variety. _FLOURBALL, tubers large and handsome, and a 
very good keeper, also resisting disease well; of excellent 
quality, and a great cropper; mid-season or late. HARBINGER, 
tubers medium, white, and of excellent quality; a splendid 
early variety, and very prolific. SATISFACTION, tubers large, 
handsome, and fine for exhibition; a heavy cropper, and of 
first-class cae TRIUMPH, tubers handsome and of high 
quality ; a long keeper, and excellent for general crop. 
POTATO SCAB. Though popularly associated with 
the Potato, this disease attacks other vegetable crops 
and particularly Beet. Of recent years, many investi- 
gations have been made in respect thereto in America. 
Amongst the preventive measures suggested is the use of 
corrosive sublimate in solution for steeping the seed in 
prior to planting. This dangerous poison, however, calls 
for such great care on the part of the operator that its 
use is hardly likely to become popular. Dr. Halsted says 
that ordinary flowers of sulphur dusted in the rows, at the 
rate of 200lb. to the acre, give excellent results; while 
Dr. Arthur, of Indiana, advocates a weak solution of 
formalin, 1 pint to 30 gallons of water. See also Potato 
—Fungi, Vol. III. 
Bee pre WEEVIL. See Potato—Insect 
ests. 
POTENTILLA. Including Sanguisorba. To the 
species described on pp. 211-2, Vol. III., the following 
should be added : 
P. alchemilloides (Alchemilla-like). jf. white; petals roundish- 
obcordate, scarcely longer than the calyx. May to July. 
