polystylous 
porraceous 
mouth), many mouthed, with 
numerous suckers or haustoria ; 
polysty’lous, -Jus (+ StyLE), with 
several styles; polysymmet’rical 
(cupmerpla, apt proportion), having 
bilateral symmetry in more planes 
than one, actinomorphic; poly- 
thalamic (9¢\apos, a bed-chamber), 
(1) having more than one female 
flower within the involucre; (2) 
derived from more than one flower, 
as a collective fruit ; polythe’leus 
(@nA7, w nipple), used of a flower 
which contains several distinct 
ovaries ; polyt’ocous, -cws (réxos, a 
birth), fruiting year after year, 
caulocarpous; polyt’omous, -mus 
(roun, a cutting), apparently pin- 
nate, but the pinnae not articu- 
lated to the common petiole ; Polyt’- 
omy, (1) in an inflorescence, having 
more axes than in dichotomy ; (2) a 
false pinnation ; polyt’richous (Oplé, 
rptxos, a hair), having many hairs ; 
Polyt’ropism (rpor7j, a twining), 
Archangeli’s term when leaves 
place their lamina vertically and 
meridionally, the two surfaces 
facing east and west ; polytrop’ic, 
Loew’s term for bees which visit a 
wide circle of flowers ; polytyp’ic 
(réros, a type), applied to a genus 
having several species; Polyx’eny 
(Eévos, a guest) = PLEIOXENY ; 
Polyzygo’sis ({vyds, a yoke), the 
conjugation of more than two 
gametes (Crozier). 
poma’ceous (pomum, a fruit, + ac- 
eous), relating to apples; Pome, 
Po'mum, an inferior fruit of several 
cells, of which the apple is the 
type. 
pomeridia’nus (Lat.), in the after- 
noon. 
pomif’erous, po'mifer (pomum, a fruit, 
fero, I bear), pome-bearing ; po’- 
miform,pomiform’is ( forma,shape), 
shaped like an apple; Pomol’ogy, 
Pomolo'gia (dbyos, discourse), the 
science of edible cultivated fruits. 
Pomo’na, an account of the fruits cul- 
tivated in any given district or 
country; the name is mythological. 
206 
pooph‘ilous (7éa, grass, piéw, Tlove), 
meadow-loving plants which con- 
sort with grasses (Pound and 
Clements) ; Po’ophyte (purev, « 
plant), a plant inhabiting meadows; 
adj. poophyt‘ic, pratal. 
Po’pulin, a crystallisable substance 
from the bark of the aspen, Popu- 
lus tremula, Linn. 
poran’drous (mépos, a passage, avyp, 
dvdpos, a man), when the anthers 
open by pores; Pore, Por’us, (1) 
any small aperture, as in anthers, 
for the emission of pollen in the 
pollen grains themselves, in the 
epidermis as stomata or water- 
pores ; (2) in Polyporus, any of the 
tube-like openings, forming the 
hymenium; (3) large pitted vessels 
or tracheids in wood; ~ Canal’, 
the passage through a pit between 
neighbouring cells; ~ Cap’sule, a 
capsule dehiscing by pores, as in 
the poppy; ~ Cir’cle, the zone in 
the annual rings of certain trees, 
such as oak, which displays numer- 
ous tracheids; ~ Cork, cork-cells in 
lenticels with intercellular spaces 
between them (Klebahn); ~ Pas’- 
sage, the stomatic passage between 
the inner and outer cavities ; — 
cor'tical ~, = LENTICEL; Poren- 
ch’yma (éyxvua, an infusion), tissue 
of elongated cells, and apparently 
pierced by pores; pitted tissue ; 
porici’dal (caedo, cecidi, to cut), 
applied to anthers which open 
by pores, porandrous; poriform 
(forma, shape), like a pore (Leigh- 
ton) ; Por’ogams (ydpos, marriage), 
phanerogamous plants which are 
fertilised by way of the chalaza 
instead of the micropyle (Treub) ; 
Porog’amy, the condition de- 
scribed ; adj.porog’amous ; por’ose, 
poro’sus; porous, pierced with 
small holes; ~ Ves’sels, pitted or 
dotted vessels. 
porphyr’eus (ropdipeos, purple), purple 
in colour, purpureus ; porphyrolew’- 
cus (Aevxos, white), light purple. 
porra’ceous, porra’ceus (Lat.), leek- 
green 
