PRO PRU 
PRU PSI 
This is an extensive pfenus of magnificent ever- 
green shrubs, generally considered difficult of cul- 
ture ; but this supposed difficulty may be removed by 
attending strictly to the watering of the plants. The 
soil best suited for them is light turfy loam, mixed 
with about a third part fine sand ; the pots must be 
well drained, and it is advisable to mix some small 
pieces of broken free-stone with the soil, in potting, 
to prevent them from retaining too much moisture ; 
the roots are also fond of running among the free- 
stone or broken potsherds. Care must also be taken 
not to let them droop for want of water, as the 
young roots are of a fleshy substance, and are as 
liable to suffer from too much drought as they are 
from too much water, whence the necessity of the 
waterings being regular and moderate. Ripened 
cuttings will root when taken off at a joint, 
planted thinly in sand, and placed under a glass, 
but not in heat ; the glass should occasionally be 
removed to allow them to dry, as they are liable to 
damp off. Water them, but not over the leaves, 
whenever they want it, and let them get a little 
dry before the glass is placed over them again. 
Synonymes : 1. P. longifolia. 2. P. speciosa. 
acaulTs .... Purple . 7, G. Ev. S. C. G. H. . 1802 
aoerosa .... Black . . 4, G. Ev. S. C. 0. H. . 1803 
acuminate . . . Purple • 5, G. Ev. S. C. G. H. . 1809 
amplexicaulls . . Purple . 2, G. Ev. S. C. G. H. . 1802 
angustata . . . Purple . 6, G. Ev. S. C. G. H. . 1820 
canaliculaU . . Pink . . 7, G. Ev. S. C. G. H. . 1800 
coccinea . . . Scarlet . 6, G. Ev. S. C. G. H. . 1824 
compacts ... . 7. G. Ev. S. C. G. H. . 1810 
eordata .... Purple . 4, G. Ev. S. C. G. H. . 1790 
cynaroides . . . Purple . 8, G. Ev. T. C. G. H. . 1774 
elongatS . . . Purple . 7> G. Ev. S. C. G. H. . 1820 
formosS .... Red . . 6, G. Ev. S. C. G. H. . 1789 
glaucophylla . . Green . . 4, G. Ev. S. C. G. H. .1816 
grandiflora . . . White. . 5, G. Ev, S. C. G. H. . 1787 
marginals . . White . . 6, G. Ev. S. C. G. H. . 1795 
liirsutS . . . .Pale . . 6, G. Ev. S. C. G. H. .1819 
humllls .... Brown . 7i G. Ev. S. C. G. H. . 1802 
incomptS . . . White . . 4, G. Ev. S. C. G. H. . 1822 
Imvis, 1 . . . . Green . . 5, G. Ev. S. C. G. H. . 1806 
latifoUa. . . .Purple . 8, G. Ev. S. C. G. H. .1806 
coccingS . . . Scarlet . 8, G. Ev. S. C. G. H. . 1806 
viridiflorS . . Green . . 8, G. Ev. S. C. G. H. . 1806 
lepidocarpon . . Purple . 5, G. Ev. S, C. G. H. . 1806 
ligul«folIS . . . Purple . 4, G. Ev, S. C. G. H. . 1798 
longiflorS . . . Pale . . 2, G. Ev. S. a G. H, . 1795 
longifolia . . . Purple . 5, G. Ev. S. C, G. H. . 1798 
lores White . . 5, G. Ev. S. C. G. H. . 1824 
macrophvllS . . White . . 5, G. Ev. S. C. G. H. . 1824 
magnincs . . . AVhite. . 4, G. Ev, S. C. G. H. . 1789 
melaleucS . . . Purple . 5, G. Ev. S. C. G. H. . 1786 
melllferS ... Pa. yeL . 9, G. Ev. S. C. G. H. . 1774 
SlbS .... White . . 9, G. Ev. S. C. G. H. . 1795 
mucronifolIS . . White . . 9, G. Ev. S. C. G. H. . 1803 
nana Pink . . 5, G. Ev. S. C. G. H. . 1787 
neriifoliS . . . White . . 3, G. Ev. S. C. G. H. . 1806 
obtiisa, 2 ... Red . . 3, G. Ev. T. C. G. H. . 1786 
pallens . . . .Pale . . 6, G. Ev. S. C. G. H. . 1819 
patens . . . . Wht. pur. 4, G. Ev. S. C. G. H. .1789 
pendiils .... . 4, G. Ev. S. C. G. H. . 1806 
pulchellS ... Red . . 6, G. Ev. S. C. G. H, . 1795 
ciliatS . . . Red . . 6, G. Ev. S. C. G. H. .1795 
glabra ... Red , . 6, G. Ev, S. C. G. H. . 1795 
speciosa . , . Red . . 6, G. Ev. S. C. G. H. . 1795 
repens .... . 7, G. Ev. S. C. G. H. . 1800 
revolutS . . . Purple . 5, G. Ev. S. C. G. H. . 1824 
scabrS .... Brown . 6, G. Ev. S. C. G. H. . 1809 
Scolopendrium . . 5, G. Ev. S. C. G. H. ^ 1802 
Scolymus . . . Purple , 4, G. Ev. S. C, G. H. “ 1780 
speciosS .... Purple . 4, G. Ev. S. C. G. H. . 1786 
tenax .... YeUow . 4, G. Ev. S. C. G. H. . 1801 
tenuifbllS ... 4, G. Ev, S. C. G. H. . 1795 
tnrbiniflorS . . Pink . . 4. G, Ev. S. C. G. H. . 1803 
umbonalls . . . Whu black 5, G. Ev. S. C. G. H. .1798 
villlftra .... Purple . 8, G. Ev. S. a G. H. . 1800 
FrotococcOs, Agardh. From protos, first, and kokkos, 
a berry, Linn. 24, Or. 7, Nat. Or. Algos. This 
species is found on rocks during summer — P. nivalis. 
ProtonemX, Agardh. From protos, first, and nema, a 
filament; in allusion to the simplicity of structure. 
Linn. 24, Or. 7, Nat. Or. Algos. Singular species of 
Algos, found in caverns, on the earth, hotbeds, &c. — 
P. cryplurtim, frograns, muscicula, Orthotrichi, 
rSpSns, umbrOsum, velutlnUm. 
Pruinosk, covered with glittering particles, as if fine 
dew had been congealed upon it. 
PRUNEI.I.A, Linn. Altered from Brunella, derived 
from the German die Brauns, A disorder in the jaws 
and throat, which this plant was supposed to cure. 
Linn. 14, Or. 1, Nat. Or. Labiates. The species of 
t 259 J 
this genus grow freely in a light rich soil, and are 
well adapted for ornamenting rock-work, or the 
front of flower-borders ; they are readily increased 
by divisions. Synonymes : 1. P. australis. 2. P. 
pennsylvanica. 3. P hirta. 4. P. alba, P. laciniata. 
5. P. incisa, P. longifolia. 
Browniana, 1 . . Blue . . 8, H. A. N. S. W. . 1826 
grand flora. . . Blue . . 8, H. Her. P. Austria. . 1596 
hyssopifolia . . Lgt. blue 8, H. Her. P. France . . 1731 
Marrj att® . . . Purple . 7, H. Her. P. 
ovatii .... Purple . 7, H. A. America 
vulgaris .... Pink . . 7> H. Her. P. Britain . . 
dongata, 2 . « Violet . 7, H. Her. P, N. Araer. . 
flore-pleno . . Pink . . 7. H. Her. P. Britain gard. 
hispida, 3 . . Pa. pur. . 7, H. Her. P. Europe . . 
laciniata, 4 . . White . 7, H. Her. P. Europe . 
pinnatifida, 5 . Purple . 7, H. Her. P. S. Enr. . . 
rubril .... Red . . 7» H. Her. P. Britain g»rd. 
Webbiana . . . Lilac . . 8, H. Her. P. 
PrukDs, Linn. From prune, its Greek name. Linn. 
12, Or. 1, Nat. Or. Rosacea. All the kinds of Plum 
grow well in any common soil, and are increased 
by seeds or suckers, or by grafting or budding to 
perpetuate the particular kinds, 
candicans . . . White . . H. De. S. . 1820 
Coccomlll^ . . . ^Vhite . . H. De. S. Calabria . 1824 
divaricata . . . White . . 4, H. De. S, Caucasus . 1820 
domestica . . . White . . 4, H. De. T. England 
armenioides . White . . 4, H. De. T. 
flora-pleno . . White . . 4, H. De. T. 
fol. variegatls . White . . 4, H. De. T. 
myrobalana . . White . . 4, H. De. T. 
turnnensis . . White . . 4, H. De, T. Turin . . 
insitltla .... White . . 4, H. De. T. Britain . . 
flora-pleno . . White . . 4, H. De. T. 
fr. luteo-albd . White . . 4, H. De. T. 
fructu-nigro . White . . 4, H. De. T. 
fructu-rubro . White . . 4, H. De. T. 
marltima . . . White . , 4, H. De. T. N. Amer. . 1800 
pubescens . . . White . . 4, H. De. T. . 1818 
spinosa .... "White . . 4, H. De. T. Britain . . 
florS-pleno . . White . . 4, H. De. T. Tarascon . 
fol. variegatls . White . . 4, H. De. T. Britain . . 
macrocarpa . . White . . 4, H. De. T. Britain . . 
microcarpS . . White , . 4, H. De. T. Britain . . 
ovata .... White . . 4, H. De. T. Britain . . 
Prurient, causing an itching sensation. 
PsAMMA, Romer and Schultes. From psammos, sand ; 
its place of growth. Linn. 3, Or. 2, Nat. Or. Gra- 
mineos. A grass with a strong perennial creeping 
root; on some parts of the coast it is planted to 
keep the sand from being removed by the wind and 
tides ; it is also used for mats and thatch. Syno- 
nyms : 1. Arundo arenaria. 
arenSrla, 1 . . . Apetal . . 6, Grass. Britain . . 
PsiADiA, From psiar, a dew-drop ; in allu- 
sion to the glutinous exudation on the leaves. 
Linn. 19, Or. 5, Nat. Or. Composites. A species of 
little beauty, growing in any light rich soil ; 
cuttings will root freely under a glass. Synonyms : 
1 . Conyza glutincsa, 
glutinosS, 1 . . Yellow . 6, S. Ev S. Maurit. . .1796 
PsmiuM, Linn. Derived from psidion, the Greek 
name of Pomegranate. Linn. 12, Or. 1, Nat. Or. 
Myrtaccos. The species of Guava grow well in a 
mixture of loam and peat, and cuttings will root in 
sand, under a glass ; they will also root from layers. 
Some of the species fruit well in our stoves, but they 
are not considered to be of much value. P. Cattley- 
anum has a fruit of a fine claret colour, and bears 
some resemblance in consistence and flavour to the 
strawberry. Synonymes; 1. P. grandiflorum. 2. 
P. chinense. 3. P. guianense. 4. P. sapidissimum. 
aromaticum . . White . . S. Ev. S. Guiana . . 1779 
gprandiflorum, 1 White. . 7, S. Ev. S, Guiana . . 1800 
Cattleyanum, 2 . White. . 6, S. Ev. T. S. Amer, . 1818 
cordatum . . . White. . 6, S. Ev. S. Guadal. . 1811 
fluviatlle, 3 . . White . . S. Ev. S. Cayenne . 
fragrans . . . White . . 6, S. Ev. S. Guiana . .1823 
guineSnsS . . . White . . 6, S. Ev. S. Guinea . . 1822 
latifiillum . . . White . . 6, S. Ev. S. S. Amer. . 1800 
montanum . . . White. . S. Ev. T. Jamaica . 1779 
myrtifollum . . White . . 4, S. Ev. S. . 1820 
oligospermum . . White . . S. Ev. S. . 1817 
polycSrpon . . . White. . 5, S. Ev. S. Trinidad . 1810 
pomlftrum . . . White . . 6, S. Ev. S. W. Ind. . 1692 
sapidissimum, 4 White. . 6, S. Ev. S. . 1824 
pyriferum . . . White . . 6, S. Ev. S. W. Ind. . 1656 
PsilonTa, Fries. From psilos, a spot. Linn. 24, Or. 
9, Nat. Or. Fungi. A reddish-coloured species. 
