AN ENCYCLOPADIA 
~ 
OF HORTICULTURE. 169 
Plum—continued. 
which it pierces while still soft. The larva feeds, till full 
grown, on the seed, and then bores a hole for its escape as 
a beetle; but it remains inside the stone, and there be- 
comes a pupa. The beetle emerges usually in August or 
September, and hybernates in the perfect state. It feeds, 
in spring, on young Plums, into which it bores its beak. 
The Plums exude gum, and become knotty and useless. 
This beetle is also known as Anthonomus prunicida. The 
remedies recommended are jarring the trees, to shake 
down the beetles, as with the Plum Curculio, and collect- 
ing and destroying fallen fruits. The beetles are active, 
and take flight readily ; hence, jarring is less successful 
than with the former species. — 
PLUMBAGELLA. Included under — 
(which see). ** 
PLUMBAGINEÆ. A natural order of , 
or woody, generally perennial plants, broadly distri- 
buted, but, for the most part, abounding in maritime 
districts and salt lands. Flowers pink, violet, blue, or 
yellow, rarely white, hermaphrodite, regular, sessile or 
shortly pedicellate; calyx gamosepalous, tubular or 
funnel-shaped, sometimes coloured, five, ten, or fifteen- 
ribbed, the primary ribs produced into teeth or lobes; 
corolla monopetalous, or of - five petals, hypogynous, 
sometimes shortly connate or coherent, rarely all free at 
base; stamens five, opposite the petals or corolla lobes. 
Fruit a capsule or utricle, included in the calyx, or 
rarely elongated and exserted. Leaves sometimes fas- 
cicled at the top of a rhizome, simple, entire, semi- 
amplexicaul; sometimes shortened into a petiole, dilated 
at its base, and amplexicaul; sometimes alternate, on a 
branching stem, with swollen nodes; exstipulate. Cer- 
tain of the species possess tonic and. astringent pro- 
perties.. The Plumbagos contain a caustic colouring 
matter. Hight genera and scarcely 200 (according to 
Bentham and Hooker) species are included in this 
order. Examples are: Armeria, Plumbago, and Statice. 
PLUMBAGO (the old Latin name, used by Pliny, 
from plumbum, lead; the plant is said by him 
to be efficacious in curing the lead disease). Leadwort. 
Syn. Thela. Including Plumbagella. Orv. Plumba- 
ginee. A genus comprising about half-a-score species of 
stove, greenhouse, or hardy perennial herbs, sometimes 
shrubby, rarely annuals (one species leafless), inhabiting 
the warmer regions of the globe. Flowers blue, rose- 
colour, violet, or white, spicate at the apices of the 
branches; calyx tubular, five-fid; corolla salver-shaped, 
the limb spreading, five-lobed. Leaves usually alternate, 
auriculate-amplexicaul, or dilated at base into an 
amplexicaul petiole, or naked and toothed. The tender 
sorts flower best in a moderately warm house, and are 
well adapted for growing against a wall. The most 
suitable compost is one of good fibrous loam and sand, 
and a little peat. They do very well when planted out 
in the borders of a warm conservatory, or in a warm 
greenhouse. Propagated by the rooted shoots from 
the base of the plants; or by nearly ripe cuttings, which 
root freely in a gentle bottom heat. The annual species 
are easily raised from seeds, sown in the open border, 
in spring. The majority of the species are, Or have 
been, cultivated in our gardens. P. capensis is ad- 
mirably adapted for training up a mhouse rafter or 
pillar. It should be cut back hard after flowering, and 
allowed to rest through the winter by being kept 
rather dry. The beautiful pale blue flowers are pro- 
duced in the greatest profusion on the shoots of the 
current year. This plant also succeeds in a warmer 
temperature, and, if grown in two or three positions — 
differently affected in this t, the flowering season 
collectively may be prolonged by the plants in one house 
succeeding those in the other. P. rosea is a fine winter- 
flowering plant, requiring more: heat than See 
— 
Plumbago—continued. 
except in the summer. It is adapted for pot cutters: or 
for planting in a stove. The hardy perennial species thrive 
in ordinary soil, and may be increased by divisions. 
P. ca (Cape of Good Hope).* fl. pale blue, disposed in 
terminal, sub-secund, short, approximating spikes ; corolla tube 
thrice as long as the calyx. Summer and autumn. l. oblong or 
Se ens obtuse, cig rhen entire. Stem angularly 
striate. 2ft. Cape of G Hope, 1818. A stove or green- 
house, climbing or —— shrub, sometimes employed in 
bedding. (B. M. 2110; B. R. 417.) 
P. coerulea (blue). f. blue, about żin. long, 
terminal spikes ; corolla half as long again as t 
dilated above. Summer. 
in loose, 
calyx tube, 
i. a sub-rhomboid, attenu- 
ated and slightly acute at both ends. erect, nous, 
branched. h. 1{t. South America, 1826. Greenhouse annual. 
(B. M. 2917, under name of P. rhomboidea.) 
Fic. 206. INFLORESCENCE OF PLUMBAGO EUROPA. 
Hard: 
——— See Fig. 206. (B. M. 2139; S. F. G. 191). 
P. Larpentæ Gan ua eges f violet, in, in — terminal 
obovate, —— — —— scaly, 
h. lft. — — (Gs C- Tet Tie. $.) The 
correct name of this plant is perennial. —— 
* 
tten into ver AE 
oblong, pg Brine a —— le 
riculate at the base. 
aieh branched. A. 2ft. Siberia, — Hardy annual 
P. occidentalis (Western). ——— ae 
bluish-violet, scarcely šin. — 
P. see ee. ‘ parts 
—— long again as Summer. "Love — 
as calyx. 
attenuated at base into —— exicaul 
slender, branched, striated. to 3ft. 
: B. ©._1636, under name of P. r 
