Pneumato-chymifera 



Polioplaam 



many-valved, as opposed to uni- 

 valved or folliculate. 



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

 (Trv(vfj.a, 7rvv/j.a.Tos, breath, air), 

 spiral vessels (Lindley) ; Pneu'- 

 matode (656s, a way), any open- 

 ing of the nature of a lenticel or 

 stoma ( Jost) ; Pneu'matophore, 

 Pneumatoph'orum (<popeu, 1 carr}'), 

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

 scription, as tracheids ; (2) inter- 

 cellular spaces in Riiizophoreae 

 (Karsten) ; (3) J the membranous 

 tube of a spiral vessel (Lindley) ; 

 pneumatotac'tic (TCLKTIKOS, 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 Achlya ; Pneuma- 

 tof'erus (fe.ro, I bear), the ex- 

 ternal membranous tube of spiral 

 vessels (Henslow). 



Pock'et-plums = BAG -PLUMS. 



poc'uliform, pocufiform'is (pocuhim, 

 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 Corydctlis, Hypecoum, and 

 Gleome. 



pode'tiiform ( + PODETIUM from TTOUS, 

 7ro56s, 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 

 oapitulum of Marchantia ; and (3) 

 the seta of Mosses ; Pode'ta J is 

 given by Lindley as a synonym. 



pedicellate, Leigliton's term for 

 stalked, as applied to Lichens. 



PodiciTlum J 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, -his (xe^aXiJ, a head), 

 with a pedunculate head ; Podo- 

 gfyn'iurn (ywri, a woman), an 

 elevation in the centre of a flower 

 which carries the ovary, a gyno- 

 phore ; adj. podogyn'icus, podo- 

 g-'ynus ; podop'terous (irrepov, a 

 wing), having winged peduncles 

 (Crozier) ; Pod'osperm, Podosper'- 

 mium, -ma (o-Tre'p/xa, a seed), the 

 stalk of a seed, the funicle. 



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

 position to denote a,r\y collection of 

 long hairs. 



Point'al, an old term for PISTIL ; 

 pointless, muticous ; point'letted, 

 apiculate. 



Polache'na, Polacku'na Polakt.' nlum 

 (iro\tis, many, a, without, ^o/vw, 

 I gape), Richard 'd term for ;, fruit 

 like a cremocarp, but composed of 

 five carpels, cf. PENTACHBNIUM. 



polar, relating to the poles of an 

 organ ; ~ toiloc'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- 

 pur-'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, Si/phium 

 laciniatum, Linn. 



Polem'bryony = POLYEMBRYONY. 



poleward [dissyl.], towards the poles, 

 in nuclear division. 



Polexostylus (TTO\VS, many, ew, out, 

 O-TI^XOS, style) = CARCEBDLE. 



Polioplasm (71-0X165, grey, TrXdcr/ua, 

 moulded), Tswett's term for the 



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