polystylous 



porraceous 



mouth), many mouthed, with 

 numerous suckers or haustoria ; 

 polysty'lous, -lus ( + STYLE), with 

 several styles ; polysymmet'rical 

 (ffvpfierpla, apt proportioa), having 

 bilateral symmetry in more planes 

 than one, actinomorphic ; poly- 

 tnalam'ic (6d\a/Ms, a bed-chamber), 

 (1) having more than one female 

 flower within the involucre ; (2) 

 derived from more than one flower, 

 as a collective fruit ; poly'uke'leus 

 (07?A?7, a nipple), used of a flower 

 which contains several distinct 

 ovaries ; polyt'ocous, -cus (ri/cos, a 

 birth), fruiting year after jear, 

 caulocarpous ; polyt'omous, -mus 

 (TO/J.T), 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 (Opi, 

 rpt^os, a hair), having many hairs ; 

 Polyt'ropism (rpoirrj, 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 

 (TUTTOS, a type), applied to a genus 

 having several species ; Polyx'eny 

 (^os, a guest) = PLEIOXENY ; 

 Polyzygo'sis (vy6s, 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'- 

 mMoTm.,pomiform' is (forma, shape), 

 shaped like an apple ; Pomol'ogy, 

 Pomolo'gia (\6yos, 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. 



pooph'ilous (7r6a, grass, 0tXew, Hove), 

 meadow-loving plants which con- 

 sort with grasses (Pound an;l 

 Clements) ; Po'ophyte (fyvrov, a 

 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 (Tropos, a passage, civr/p, 

 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 (e'7x i 'M a > 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 ; por'iform 

 (forma, shape), like a pore (Leigh- 

 ton) ; Por'ogams (yd/j.os, 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 ; por'ous, pierced with 

 small holes ; ~ Ves'sels, pitted or 

 dotted vessels. 



porphyr'eus (7rop<i''peo?, purple), purple 

 in colour, purpureus : porphyroleu'- 

 cus (Aeu/cos, white), light purple. 



porra'ceous, porra'ceus (Lat.), leek- 



206 



