Pontiam 



Postfartilization 



Fonti'um {itSvtos, the sea), a deep sea 

 formation ; pontoph'ilus {<pix4(a, I 

 love), dwelling in the deep sea ; 

 Pontophy'ta {(pvrhy, a plant), deep- 

 sea plants (Clements). 



pooc'ola (ttoo, grass, meadow ; colo, I 

 inhabit) ; pooph'ilous, pooph'ilus 

 {(pi\4(a, I love), meadov.'-loving 

 plants which consort with gi-asses 

 (Pound and Clements) ; Poophy'ta 

 {(pvrhu, a plant), meadow plants 

 (Clements) ; Po'ophyte, a plant in- 

 habiting meadows; adj. poophyt'ic, 

 pratal. 



popu'leus. the blackish-green of 

 poplar leaves, Pojnihis nigra ; Po'- 

 palin, a crystallisable substance 

 from the bark of the aspen, Populus 

 tremula, Linn. 



poran'drous {-rrSpos, a passage ; av^p, 

 avSphs, a man), when the anthers 

 open by pores. 



porca'tus {porca, a ridge), ridged ; 

 employed by Lemaire. 



Pore, Po'rus {iropos, passage), (1) any 

 small aperture, as in anthers, for the 

 emission of pollen in the pollen grains 

 themselves, in the epidermis as sto- 

 mata or water-pores ; (2) in Poly- 

 porus, any of the tube-like openings, 

 forming the hymenium ; (3) large pit- 

 ted vessels or tracheids in wood; (4) 

 an opening in the prickles of Victoria 

 reyia; (5) cavities in soils not occu- 

 pied by solid substances (Warming) ; 

 Pores, air = (l) Stomata ; (2) 

 Pneuma'thodes ; -^ , bor'dered, in 

 Sphagnum, the opening surrounded 

 by a distinct thickened ring ; Pore 

 Canar, the passage through a pit 

 between neighbouring cells ; "•' Cap'- 

 sule, a capsule dehiscing iDy pores, 

 as in the poppy; ~ Cir'cle, the 

 zone in the annual rings of certain 

 trees, such as an oak which displays 

 numerous tracheids ; ^ Cork, cork- 

 cells in lenticels with intercellular 

 spaces between them (Klebahn) ; -^ 

 Pas'sage, the stomatic passage be- 

 tween the inner and outer cavities ; 

 '-' Space, -^ Vorume, the sum of 

 the spaces in soils not taken up by 

 solid particles ; — a'pical -^ , cf. 



Hydathodes ; cor'tical --' , = Len- 

 TiCEL ; Porench'yma {eyxv/j-a, an 

 infusion), tissue of elongated cells, 

 and apparently pierced by pores ; 

 pitted tissue ; porici'dal:(ccerfo, cecidi, 

 to cut), applied to anthers which 

 open by pores, porandrous ; por'i- 

 form {forma, shape), like a pore 

 (Leighton); For'ogams {yd/xos, mar- 

 riage), phanerogamous plants which 

 are fertilised by w^ay of the chalaza 

 instead of the micropyle (Treub) ; 

 Porog'amy, the condition described ; 

 adj. porog'amous ; Por'oids {eUos, 

 resemblance), small circular dots in 

 the cell-wall of Diatoms resembling 

 pores (0. Muller) ; Porom'eter 

 l^iTpov, a measure), an instrument 

 to measure the dimensions of stomata; 

 .por'ose, poro'sus ; por'ous, pierced 

 with small holes ; ~ Ves'sels, pitted 

 or dotted vessels. 



porphyr'eus {iropcpvptos, purple), purple 

 in colour, purpureus ; porphyroleu'- 

 cus (AeuKos, white), light, purple. 



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

 green. 



porrect', porrec'tus (Lat., stretched 

 out), directed outward and for- 

 ward ; cf. arrect. 



por'ulus (Lat.), somewhat porous. 



Por'us = Pore. 



pos'itive, the absolute or effective 

 condition, opj-.osed to negative, and 

 prefixed for emphasis to such terras 

 as Geotropism, Heliotropism, Hy- 

 drotropism, etc. 



postcarpotrop''ic {post, after, -j- carpo- 

 TROPic), curvature of the peduncle 

 at the maturation of fruit to help 

 in dissemination ; postcotyle'donary 

 (+ Cotyledon), after the develop- 

 ment of the seed-leaves. 



Pos'teriform {posterus, last, -|- Form), 

 the late derivative of an ancestral 

 form ( Kuntze). 



poste'rior (Lat., coming after), (1) 

 next or towards the main axis, 

 superior ; the reverse of anterior ; 

 (2) in anthers = extrorse. 



PoBtfertiliza'tion {post, after, -f- Ferti- 

 lization), the processes from ferti- 

 lization of the ovule to its maturation; 



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