Pneumato-chymifera 



Poliopiasm 



many-valved, as opposed to uni- 

 valved or folliculate. 



Pneu'mato - chymif era [Va'sa] J 

 (irvfvfjia, Trve^fjLaros, breath, air), 

 spiral vessels (Lindley) ; Pneu'- 

 matode (65os, a way), any open- 

 ing of the nature of a lenticel or 

 stoma ( Jost) ; Pneu'matophore, 

 Pneumatoph'orum ((poptw, I carry), 

 (1) used of air-vessels of any de- 

 scription, as tracheids ; (2) inter- 

 cellular spaces in Rhizophoreae 

 (Karsten) ; (3) J the membranous 

 tube of a spiral vessel (Lindley) j 

 pneumatotac'tic (ra/m/cos, 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 ; 

 neg'ative ~ , the irritability which 

 determines the escape of certain 

 spores, as in AcMya ; Pneuma- 

 toferus (fero, I bear), the ex- 

 ternal membranous tube of spiral 

 vessels (Henslow). 



Pock'et-plums = BAG-PLUMS. 



poc'uliform, poculiform'is (pocidum, 

 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 ( + PODETIUM from TroG?, 

 ?ro56s, 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 J is 

 given by Lindley as a synonym. 



pedicellate, Leighton's term for 

 stalked, as applied to Lichens. 



Podicil'lum a very short podetium 

 (Lindley) ; Podium, Pod'us, a foot- 

 stalk or similar support ; Pod'ocarp, 

 Podocar'pus (Kapiros, fruit), a stipi- 



tate fruit, that is, when the ovary 

 is borne by a gynophore ; podo- 

 ceph'alous, -lus (/ce0aX>?, a head), 

 with a pedunculate head ; Podo- 

 gynlum (yw^ t a woman), an 

 elevation in the centre of a flower 

 which carries the ovary, a gyno- 

 phore ; adj. podogynlcus, podo- 

 g'ynus ; podop'terous (irrepov, a 

 wing), having winged peduncles 

 (Crozier); Pod'ospenn, Podosper'- 

 mium, -ma (o-Trfy/Mi, a seed), the 

 stalk of a seed, the funicle. 



Po'gon (irtbyw, a beard), used in com- 

 position to denote any collection of 

 long hairs. 



Point'al, an old term for PISTIL; 

 pointless, muticous; pointletted, 

 apiculate. 



Polache'na, Polacke'na Polake'nium 

 (71-0X1)5, many, a, without, x aiv <>>, 

 I gape), Richard's term for a fruit 

 like a cremocarp, but composed of 

 five carpels, cf. PENTACHENIUM. 



po'lar, relating to the poles of an 

 organ; ~ bUoc'ular, applied to 

 Lichen spores which have cells at 

 the opposite apices. 



Polar (TroXos, a pivot) Bodies, a 

 portion of the protoplasm of a 

 mother-cell thrown off as nucleated 

 cells from the oospore before fertili- 

 sation ; ~ Cell, = ~ BODY ; ~ Cor- 

 pus'cle, the central mass in each 

 ASTER of a dividing nucleus ; ~ 

 Glob'ule, = ~ BODY ; ~ Nu'cleus 

 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 ; 

 Polarity, (1) the condition of having 

 distinct poles ; (2) the assumption 

 of a direction pointing to the poles, 

 as the compass-plant, Silphium 

 laciniatum, Linn. 



Polem'bryony = POLYEMBRYONY. 



poleward [dissyl.], towards the poles, 

 in nuclear division. 



Polexostylus (?roXj>s, many, ew, out, 

 orriXos, style) - CARCERULE. 



Polioplasm (iroXios, grey, 7rXd<r/xa, 

 moulded), Tswett's term for the 



202 



