AN ENCYCLOPADIA 
OF HORTICULTURE. 201 
Populus—continued. 
for carving, ee marina &e.; the bark is employed in 
tanning. (Sy. En. B. 1302.) For figure and dimensions of an 
enormous specimen of this tree, see G. C. n. S., xxi. 
P. n. pyramidalis (pyramidal).* Lombardy Poplar. 
leaves and branchlets glabrous. Habit pyramidal. 
P. dilatata, P. fastigiata. 
P, Simonii (Simon’s). Z, thick, sub-erect, 5in. to 6in. long, about 
šin. broad, ovate-elliptic, equally attenuated at each end, dentate, 
crisped, intense green above, glaucous-white beneath. Branches 
elongated ; bark reddish-brown. China, 1867. A tall tree. 
P. tomentosa (tomentose). 7. oval, 4in. to 5in. long, 2in, to 24in. 
broad, usually cordate at base, very acutely toothed, intense 
n above, white-tomentose beneath. Youn; branchlets tomen- 
hn ee glabrous; buds thick, conical, woolly-tomentose. 
ina, 1867. 
Young 
SYNS. 
G. 254. BARREN BRANCHLET, AND ONE BEARING MALE CaTKIN, 
OF POPULUS TREMULA. 
P. Tremula (tremb ' Agah A. fl, catkins 2in. to Zin. lo 
cylindric, — ————— l lin. to 4in. long ; thon of the 
shoots cordate, acute, — cottony — —— hose of the 
A is wh ts soe tan ie A — only differing froun the 
— a its —* oper t makes a , round- 
—— aa Aan oa wall lam ot Ga tye, 
— — like). American A . l. roundish- 
P, tre —— point — small, somewhat regular 
sams — 
na A also a be toting viscous, h. 
u 
(E. T. 8. Gi Gan aae ————— Gee Popeda. 
PORANA (said to be the native name in the East 
Indies). Syns. Dinetus, Duperrya. ORD. Convolvulacee. 
——— half-a-dozen species of stove or green- 
annual herbs or shrubs, natives of the East Indies, the 
Malayan Archipelago, and Australia. Flowers — 
the 
—— limb rad of five broad, — — 
— —— sometimes ecor: 
oe 
è Porana—continued. 
date, penniveined. The shrubby species are well adapted 
for training on rafters or pillars, in a stoveg or in the warm 
part of a greenhouse. They thrive best in a compost 
of sandy loam and leaf mould, and are propagated by 
cuttings of stubby side shoots, which root readily in a 
compost similar to that just named. The annual species 
may be sown in heat, in early spring, and the seedlings 
either grown on in pots or planted out in the green- 
house or conservatory. 
ta (panicled). fl. pure white, very ae tubularly 
campanulate ; panicle large, much branched, leafy. August. 
l. cordate, acuminate, glabrous above and hoary beens = 
long, lin. broad. ‘Stem terete. East Indies, 1823. 
shrubby, twining, clothed with hoary tomentum. Syn. börs 
paniculatus. 
P. racemosa (racemose).* fl. white, small; panicles loose- 
to November. 
flowered, composed of racemes, leafy. July 
1. cordate, acuminate, glabrous or downy, Zin. to 4in. long, 
with a wide recess at the base. Stem terete or z lar. 
India, 1823. Annual. “This is the ‘Snow-creeper’ the 
English, one of the most beautiful of Indian plants, the masses 
of dazzling white flowers — snow patches in the 
jungle” (C. B. Clarke). (S. B. F. G. 127.) Syn. Dinetus race- 
mosus. 
P. volubilis (twining). 
dense-tlowered. July. l cordate, “acuminate, 
terete, — ponds or covered with whi 
Indies, 1823. Plant shrubby. 
PORANTHERA (from poros, a pore or opening, and 
anthera, an anther; the anthers open by pores). ORD. 
Euphorbiacee. A genus comprising five species of green- 
house, Australian herbs, annual or at length suffrutescent. 
Flowers white, moncecious, small, densely racemose, soli- 
tary in the axils of the bracts, pedicellate ; females few, 
at the base of the capituliform racemes, which are solitary, 
or corymbose at the tips of the branches. Leaves alter- 
nate or rarely irregularly opposite, membranous, entire, 
small or narrow. P. ericifolia, the only species in cultiva- 
tion, is a rather ornamental suffrutescent herb. It thrives 
in a peaty soil, and may be increased by seeds. 
. ericifolia (Heath-leaved). fl — the 
icles 
cer Rigg ov 
warts. East 
Heo white, small, numerous ; 
racemes fornfing a dense, ‘inal, corymb. July, 
i. crowded pico linear, jin. to jin. Bt with —— 
high.’ 1824. (T. L. S. 
Stem erect, 6in. to nearly 
— p. 501.) 
PORLIERIA (named after Andrew de Porlier, a 
Spanish patron of botany.) ORD. Si age A * 
genus (three species) of rigid, stove shrubs, with spreading, 
woody branches, natives of Texas, Mexico, the Pernvian 
Andes, Chili, and Parana. Flowers disposed in fascicu- 
late, one-flowered peduncles ; sepals four or five, rotundate, 
unequal, deciduous ; petals four or five, te, im- 
bricated. Leaves opposite, abruptly pinnate; leaflets 
almost opposite, entire, sensitive. The under-mentioned 
species (the only one introduced) thrives in a mixture 
of loam and peat. Propagation may be effected by 
ripened cuttings, inserted thinly in a pot of sand, — 5 is 
placed under a hand glass, in moderate eese : 
| eee ; pe! tais Tour, connive poe hy i with a seven or 
father ——— on the approach of — A, 
eru, 1 
POROSTEMA. A synonym of Nectandra (which 
see). 
PORPAX (of Lindley). Included under Eria. 
PORPAX (of Salisbury). A synonym of Aspidistra. 
PORPHYRA. A synonym of Callicarpa. 
PORPHYREUS. Of a warm reddish-colour, — 
PORPHYROCOMA. Included under Dianthera. 
PORRUM. Included under Allium. 
PORTEA (named after Marius Porte, who first ; 
discovered the genus). Including Ortgiesia. ORD, 
Bromeliacee. A genus comprising three or four species 
of stove, American herbs, with short stems. Flowers 
beneath the upper bracts solitary, those under tho lower 
