Net 



Orgadad 



Net, loose tissue of pseudoparen- 

 chyma ; cf. Hartig Net, 



Neu'ston (veyaraj, swimming), float- 

 ing vegetation (Sernandcr). 



New Place effect, seed from a distant 

 locality producing changed results 

 (Collins). 



Nipe'tum, association of Nipa Thumb. 



Ni+elle'tum, a similar one of Nitella Ag. 



Ni trogen Fixa'tion, non-symbiotic by 

 anaerobic bacteria, symbiotic by 

 means of bacteroids (Conn) ; nitro- 

 ph'iious, add, nitrogen-loving, ap- 

 plied to lichens (Sernander). 



nomoph'yllous (^u'AAov, a leaf), leaves 

 normal for genus or other group 

 (Radlkofer). 



non'tuple, nine sets of chromosomes 

 affected ; Blakeslee has it as 

 non'nple. 



Nu'cleolar Bo'dy, at the periphery 

 of the nucleolus of Lathyrus Tourn. 

 is a darkly staining thread ; Nu- 

 cle'oli, Erikson's term for fungus- 

 protoplasm which separates itself 

 from that of the host into " special 

 corpuscles"; Nucleosta'toliths ( + 

 Statolith), nuclei more or less 

 united to starch grains or starch- 

 containing chloroplasts to form a 

 gravitational unit (Prankerd) ; 

 Nu'cleus, Incip'ient, of myxophycean 

 cell, formerly termed " Central 

 Body " (West) ; -^ of diatoms, (a) 

 Macronu'cleus, the nucleus; (6) 

 Micronu'cleus, the centrosome 

 (West). 



Nuda'tion (niidatio, nakedness), the 

 occurrence of bare areas due to 

 various causes, termed by Clements 

 " Denudation " (Gams). 



nul'liplex, no dominant genes, but 

 one dominant factor (Blakeslee). 



Nuphare'tum, association of Nuphar 

 Sibth. et Sm. 



Nymphaee'tum, the like of Nymphaea 

 Linn. 



Oc'tad, with eight nuclei ; oc'tosome, 

 with eight sets of chromosomes 

 (Blakeslee); octosterigmat'ic, hav- 

 ing eight sterigmata (Buller) ; 

 oc'tokont {kovtos, a pole), possess- 



ing eight equal flagella (Church) ; 

 oc'tuple, eight sets of chromosomes 

 affected (Blakeslee) ; oc'toploid, with 

 somatic chromosomes 56 in number, 

 i.e. eight times the normal seven 

 in Rosa Linn. 



OeCOlOg'iC, cf. ECOLOGIC 



Oec'otype, cf. Ecotypb. 



OH, cf. H-iONS. 



oid'ial, add, adj. of Oidium Link ; 

 Oid'iospores ( + Spore), arise from 

 hyphae in a chain in close order. 



Old Wood, also termed " Cryptogamic " 

 or " Primary " wood (Jeffrey) ; cf. 

 Wood. 



oligorhi'zons (pi^a, a root), used of 

 marsh plants forming few roots 

 (Clements) ; oligotroph'ic (rpo^ij, 

 nourishment), applied to swamx>s 

 poor in plant nutrients (Clements). 



Ologen'esis, cf. Holoqenesis. 



Ombrocleistog'amy {ofippos, rain, + 

 Cleistooamy), flowers self-fertile 

 whilst imexpanded, due to rainy 

 weather (Kemer). 



omnic'olons {omnis, all ; coloy I 

 inhabit), used of lichens indifferent 

 to their substrata. 



Ontogen'esis (ycVeats-, beginning), 

 cf. Ontogeny ; Ontoplas'tids 



{TrXaoTos, moulded), cells in process 

 of division ; cf. Proplastid. 



ooapog'amous (cidi', an egg, + apo- 

 GAMOUs), producing partheno- 

 genetically (Juel) ; O'ocarp {KaprroSf 

 fruit) = Oospore ; O'ocyte {kittos, 

 a cavity), a gametoc3rte or spermato- 

 cyte (Minchin); Oogo'nial In'cept, 

 the early stage of the ooganium of 

 certain fungi; O'ophyte {<f>vr6v, a 

 plant) = Gametophyte. 



Oper'cle, the persistent base of a 

 style, forming a prominent point 

 to an ovary in an epigynous flower 

 (Herbert.). 



Opt'imal Ar'ea, the most favourable 

 quarters for the development of a 

 species or variety (Warming). 



orcu'liform {orcula, a little cask), 

 polarilocular, as a spore. 



Or'gadad {opyds, 6fyyd8os, a well- 

 wooded meadow), an open wood- 

 land plant (Clements). 



Q8 



453 



