Betulase 



(SUPPLEMENT) 



bivalent 



become fleshy and fused, as in 

 Juniperus. 



Bet'ulase, the same enzyme as GAUL- 

 THEKASE, but obtain d from the 

 bark of JBetula lenta, Linn. ; Betule'- 

 tum, a pUnc association of birch 

 trees (Clements). 



Bianco'ni's Plate, a plexus of scleren- 

 chymatous fibrea near the vascular 

 bundles towards the concave or 

 sensitive face of tendrils ; so termed 

 by Borzl after the discoverer. 



Biastrep'sis (/Sta'w, I force, <rrpe^is, the 

 act of turning), (1) C. Schimper's 

 term for TORSION ; (2) the transi- 

 tion from decussate to spiral 

 phyllotaxis (De Vries). 



biaxial (+ Axis), used of a spore 

 germinating at both ends (S. 

 Moore) ; Bicar'pals, proposed by 

 Bessey for the Bicarpella'tae of 

 Bentham and Hooker, a series of 

 gamopetalous Phanerogams (cf. 

 Gen. PI. ii. pp. vi.-vii.) ; the latter 

 term also used by Boulger to 

 embrace the majority of Gamo- 

 petalae with Umbelliferae ; bicar 7 - 

 pellate, having a two-celled fruit ; 

 bicellular, of two cells; bico- 

 tyle' denary, having two seed-lobes, 

 more correctly called DICOTYLEDON- 

 OUS ; bichron'ic, (xpbvos, time), 

 applied to an equation, in which 

 the mutations multiplied by the 

 intervals of time, equal the biologic 

 time (De Vries). 



biddulph'ioid, (elSos, like), resembling 

 the genus of Diatoms, Biddvlphia. 



bignonia'ceous, resembling or allied 

 to the genus Bignonia. 



Bilat'eralism (latw, lateris, a side), 

 having similar or bilateral sym- 

 metry, taken by L. H. Bailey as 

 the type of animal evolution ; 

 Bilateral 'ity, means the same. 



Biochemist, an expert in the 

 chemistry of living organisms ; 

 Biochemistry, the branch of 

 chemistry concerned with biology ; 

 biogeographlc, ( + GEOGRAPHIC) 

 concerned with the distribution of 

 living forms over the world ; 

 biological Spe'cies, those species 



which differ only by their physio- 

 logical behaviour, being morpho- 

 logically identical ; Biomol'ecule 

 ( -f MOLECULE), a living molecule ; 

 adj. biomolec'ular ; Biomon'ad, a 

 symbiotic system of biomores ; 

 when very complex it constitutes a 

 cell ; Bi'omore an aggregation of 

 biomolecules, living particles 

 (these three terms are due to 

 Giglio-Tos) ; Bioph'agism (<j>dyw, I 

 eat), the absorption and digestion 

 of the matter of living organisms 

 (Boulger) ; adj. bioph'agous ; 

 Bi'ophyte (Qvrbv, a plant), a bio- 

 phagous plant; bioplasmatlc, re- 

 lating to BIOPLASM ; Bioplas'son 

 (TrXdcrcrw, I mould), Elsberg's pro- 

 posed emendation of BIOPLASM ; 

 Bi'os, a substance so termed by 

 Wildiers, as indispensable to the 

 development of fermentation. 



Bio'sis (J3ic6<m, the act of living), 

 the state of vital activity ; life 

 (Escombe) ; biotlc, vital; ~ Fac'tors, 

 the relation of plants to each other 

 from an oecologic standpoint. 



biova'rial ( + OVARY), derived from 

 the ovaries of the fame plant 

 (Pearson). 



bipolar ( + POLAR), having two poles ; 

 Bipolarlty, (1) the condition of 

 possessing two poles ; (2) in distri- 

 bution when the same species is 

 found towards the north and south 

 poles, bub is wanting in intermedi- 

 ate regions. 



bis'cuit-snaped, when used in trans- 

 lations from the German, means 

 oblong, and slightly constricted in 

 the middle. 



bisporanglate ( + SPORANGIUM), used 

 of Ephedra, when possessing two 

 sporangia in place of one. 



bistip'ular, bistipulate ; biteg'minous 

 (tegmen, a cover), used of ovules 

 possessing double integuments ; 

 the condition is Biteg'miny 

 (Balfour). 



bityplc (TI^TTOS, a type), applied to 

 those genera which consist of two 

 widely separated species ; biv'alent 

 j strong), having hypotheti- 



