97 
Proem'bryo — T he portion of the spore in 
sotne Acotyledons which assumes a 
foliaceous character in developing, 
Proem'inex.s — W hen a part is unusually 
extended or stretches tfeyond another, 
which more freqiiently surpasses it. 
Project'era— A small longitudinal projec- 
tion on some stems where the leaf 
originates. 
PrOLIF'EROUS, Pro'LIFER, PROLfKERCS— 
An unusual development of super- 
numerary parts, of the same or of a 
dilfereut description from those on 
which they are developed, as where the 
flower- buds become viviparous ; where 
the leaf i:iroduces germs, &c. 
Proli'gerus— A pplied to a portion of the 
apothecio of Lichens, in which the 
sporules are generated. 
Prom'inens — Pi*ojei;ting beyond some 
neighbouring part. 
Pro'nus — F ace downwards. Lying flat 
upon the ground, or other 8U]>port. 
Applied also to the under surface of a 
horizontal leaf. 
pROPAc'ULrif — An offset, Propago — A 
shoot, a layer, an axillary bud. Pro- 
pag'ulum — JS ynonym for “Propacu- 
lum,” a granular reproductive body, 
many of which, collected together, 
form the aoredia of Lichens. 
Pro'physis, Pros'physis— S ynonym for 
“Adductor.*’ 
Pro’prius (Peculiar)— Partial. 
Proscol'la — A viscid gland on the ros- 
tellum of an Orchid. 
Prosem'bryem — S ynonym for “Perisper- 
inium.” 
pROSEN'CHYiu, or woody tisauo, differs in 
having its cells considerably longer 
than^ broad, usually tapering at each 
end into points and overlapping each 
other. Tne cells are coiiinionly thick- 
walled; the tissue is firm, tenacious, 
and elastic, and constitutes the prin- 
cipal part of wood, of the inner bark, 
and of the nerves and veins of leaves — 
forming, in short, the framework of the 
plant. 
Prostra'tus — S ee “ Procumbent.” 
Proteran'thou.s, Proteranthus— W here 
the flower-buds e.xpand before the leaf- 
buds. 
Protophyto'logy— F ossil bc^tany. 
pROTOPLA^i'.M.A — A Coating deposited on the 
inside of the cells of the cellular tissue, 
of quaternarj’ chemical composition 
(carbon, hydrogen, oxygen, and nitro- 
gen), which fills an important imrfc in 
cell-diviRion and growth. 
Protos'troph rs — A spiral vessel , separating 
from the main bundle that eaters the leaf, 
and forming part of the primary veins. 
Peotothal'lvs— T he first part formed, or 
substratum to the thallus of Lichens. 
Prui'na — P owdery secretions on the surface 
of some plants ; also on certain fruits. 
Peuina'tus, Prcino'sus — Frosted, 
Ijowdery, as the “bloom” upon Plums 
or Grapo-s. This term is scarcely dis- 
tinct from “Roridus.” 
6 
Pru'num — A plum; synonym for “Drupa.” 
PRUNTFOR'^ris— Approaching the form 
of a Plum. 
Pru’rtens — I tching; producing an itching 
sensation. (See the pods of the Cow- 
bage, pruriem.) 
PsF.u'PES— False. Thus ; — Pseu'do-bulb — 
Swollen internodes as seen in the stems 
of some Orchidese. Pseu’do-car'pcs — 
Synonym for “Galbulus.” P«euiio- 
cost.y'tes — W here the outer veins of a 
leaf combine, and form a iin(.‘ parallel 
to the margin. Pseudo-gyra'tus— 
Where the annulus of a fern is seated 
on the summit of the theca. Pseudo- 
hvaie'nium — A covering of the spores 
of Algfe, resembling the hyiuenium of 
Fungi. PsEcno-PERiD'ifM—Kesembling 
a peri<Hurn. Pseudo-feristo'jiiem — 
The external peristome, where it is 
early obliterated. Pseudo-po'diubi — 
A leafless dilated branch, on which 
the sessile theca of some Mosses is 
develoi»«='d. 
Psi'LOS— Bare. 
PsiLOSPKR'MUM— Bare seed, as in Strpehnos 
piiUoifpc7'^ma, of which the seeds are 
wanting the usual hairs of the genus. 
Psilosta'chyu^s — A thin spike ; where 
the inflorescence is in very slender 
spikes. 
PsiTTACiNUS — Parrot-colourod, f.c., red 
and green, as Oahnia p»ittamrmny or 
AlstT(^htirhi paittaniTia. 
Pteri'|)IE«, Pteuid'iu.u — Synonym for 
“Samara.” 
pTERruo'aicvPHiA, Pterigraph'ia — A 
treatise on ferns. 
Pterooau'pu>j — W hen a fruit is winged. 
PTEROC.\t:'rJs — Where a stem is 
winged. Pterog'okps — Where an 
angle is winged. Ptekoi'deus — A n 
elevated extension of the surface, 
assuming a winged-like appearance. 
Ptero'podus— W here the petiole is 
winged. Pterospkr'mus — Where a 
seed is winged. Ptecvg'oP 03 — Where 
the peduncle is winged. 
Pty'chodes — Synonym for “Proto- 
plasma.” 
Pu'bekty, Puber'tab— T he period when a 
plant first begins to produce flowers. 
Purer — T he period of maturation in 
fruit. 
Pu'bescence— E levated extension of the 
cellular tissue of the e^jidermis, assum- 
ing the character of hair, scale, or 
gland. Pubescent— F urnished with 
pubescence. Pubio'ercs — Bearing 
pubescence. 
PCDicus — Bashful, as Aijarkus pudicus^ 
or MiuiO^^n pudicn. 
ruGiON'iFOKMis— Shaped like a dagger. 
(See leaves of Dendrobium piigioni- 
fornic, a rather common epiphyte in the 
mountainous parts of Southern Queens- 
land. ) 
PULCHEI/LUS, PULCHER, PULCHRA, PUL- 
CHRUM — Fairorbeautiful, as Crtmlpinia 
puUhcrriuyif the Barbadoes flower 
fence. 
