Pneumato-chymifera 
Polioplasm 
many-valved, as opposed to uni- 
valved or folliculate. 
Pnew’mato - chymif‘era ([Va’sa] + 
(rvefua, mveduaros, breath, air), 
spiral vessels (Lindley); Pneuw’- 
matode (é50s, a way), any open- 
ing of the nature of a lenticel or 
stoma (Jost); | Pneu’matophore, 
Pneumatoph’orum (popéw, I carry), 
(1) used of air-vessels of any de- 
scription, as tracheids; (2) inter- 
cellular spaces in Rhizophoreae 
(Karsten) ; (3) + the membranous 
tube of a spiral vessel (Lindley) ; 
pneumatotac’tic (raxrixos, apt for 
arrangement), applied to those 
zoospores whose irritability is de- 
pendent on the presence of dis- 
solved gases, the products of 
respiration of the zoospores in the 
sporangium (Hartog); Pneumato- 
tax’y, the condition described ; 
negative ~, the irritability which 
determines the escape of certain 
spores, as in Achlya; Pneuma- 
toferus (fero, I bear), the ex- 
ternal membranous tube of spiral 
vessels (Henslow). 
Pock’et-plums = BaG-PLUMS, 
poe’uliform, poculiform'is (poculum, 
a cup, forma, shape), shaped like 
a goblet or drinking-cup. 
Pod, a dry and many-seeded dehis- 
cent fruit, a legume or silique; ~ 
-like, applied to such fruits as 
those of Corydalis, Hypecoum, and 
Cleome. 
pode’tiiform (+ Popgtivm from mois, 
moods, a foot, forma, shape), shaped 
like a podetium ; Pode'tium, (1) a 
stalk-like elevation rising from the 
thallus and supporting an apothe- 
cium in some Lichens; (2) also 
applied to the support of the 
capitulum of Marchantia ; and (3) 
the seta of Mosses ; Pode’ ta t is 
given by Lindley as a synonym. 
podicel'late, Leighton’s term for 
stalked, as applied to Lichens. 
Podicil’lum + a very short podetium 
(Lindley) ; ; Pod’ium, Pod’us, a foot- 
stalk or similar support ; Pod’ ocarp, 
Podocar'pus (xapros, fruit), a stipi- 
tate fruit, that is, when the ovary 
is borne by a gynopbore; podo- 
ceph’alous, -/us (kepadj, a head), 
with a pedunculate head; Podo- 
gyn'ium (yur, a woman), an 
elevation in the centre of a flower 
which carries the ovary, a gyno- 
ann adj. podogyn’icus, podo- 
g’ynus ; 3 podop’terous (arrepsv, a 
wing), having winged peduncles 
(Crozier); Pod’osperm, Podosper’- 
mium, -ma (orépya, a seed), the 
stalk of a seed, the funicle. 
Po’gon (rwywv, a beard), used in com- 
position to denote any collection of 
long hairs. 
Point’al, an old term for PistIL; 
pointless, muticous; point’letted, 
apiculate. 
Polache’na, Polacke’na Polake'nium 
(rods, many, a, without, yxalvw, 
I gape), Richard’s term for « fruit 
like a cremocarp. but composed of 
five carpels, cf. PENTACHENIOM. 
po’lar, relating to the poles of an 
organ; ~ biloc’ular, applied to 
Lichen spores which have cells at 
the opposite apices. 
Po’lar (mé\os, a pivot) Bod’ies, a 
portion of the protoplasm of a 
mother-cell thrown off as nucleated 
cells from the oospore before fertili- 
sation ; ~ Cell, = ~ Bopy ; ~ Cor- 
pus’cle, the central mass in each 
AsTER of a dividing nucleus; ~ 
Glob’'ule, = ~ Bopy; ~ Nucleus 
a fourth nucleus in each group at 
the two extremities of the embryo 
sac, which move towards the middle 
of the embryo sac and there coalesce 
to form the secondary nucleus ; 
Polar‘ity, (1) the condition of having 
distinct poles ; (2) the assumption 
of a direction pointing to the poles, 
as the compass-plant, Szphium 
laciniatum, Linn. 
Polem’bryony = PoLYEMBRYONY. 
po’leward [dissyl.], towards the poles, 
in nuclear division. 
Polexosty’lus (rodvs, many, ¢&w, out, 
atbdos, style) =CARCERULE. 
Po'lioplasm (modios, grey, mAdopa, 
moulded), Tswett’s term for the 
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