Bactgria, Arrestment of pigment formation 36, Abnormal 

 size 69, Involution forms 116ff,, Gall pro- 

 ducing bacteria 177, 185, In mr.rine algae 140,* 



Bacterium 68, 117, 



Bacteriods 116,, 



Bactridium 115, 



Bambusa. 42,, 



Banisteria 96, 199ff,, 



Barbarea 178,,^ 



Baric Excrescences 77,, 



Bark Formation in Galls 207., 



Bark, Hypoplasia, Reduction of the cell number 20, 

 Hypertrophy of the bark cells ("Bark excres- 

 cences"? 77, (Intumercences)81ff . , Par- 

 tic ipa,tion in the callus 142, Callus hyper- 

 trophy 8S, Wound v;ood 165, , Abnormal bark in 

 kataplasmaa 185, Cf , also„Wound Bark and 

 Gall Bark, 



Bark Tubers of the Beech 166,i 



Basidiobolus 121, 125., 



Basidiomycetes, Spore formation 94, Gall producing 177, 



Bassorah galls. 221, 



Bastard, of a (Desmidiacea?) 23, Cf,, graft hybrids. 



Bead Glands of the Ampelidaceae 85, 



Beech Tree Louse, Cf. Lachnus exsiccator* 



Beech Wool Louse, Cf, Charmes fagl. 



Begonia 56, 96, 100, 155, 200. 



Berberis 177, 188, , 



Beta 119, 127, 160, 169,, 



Be tula 96, 105ff., , ,148, 188* 



Bidens 73« 



Bigonia 96,* 



Biorrhiza 196, B,, aptera, Fig,, 89., 



Bladder (Vesicle) Galls, , on Viburnum Lan tana 111, 197« 



Blasia 109, 



Blastomeres, Multi-nuclear 69, 



Bleohnuzn 9.» 



Blood Louse 120, 179, 183ff. 



Boehmeria 96,« 



Bo.is rouge (Red Wood) 130 « 



Bordeaux Mixture , Influence on the formation of Chlot- 

 ophyll 56., 



Borragineae, Hairs poor in calcibin 38» 



Botrydium 10, 



B rac h.yc ome 3 6.« 



Brassica 32, 127, 130, 138, 147, 176, 187:, 



Broussonetia 74,, 96,, , 



Bryonia 10, 13,, 28, 96,, 



Bryophytes, Cell restitution 9, Hypoplasia 40, Gall 

 bearing 179, 



Bxyopgis 6, 10, 11, 156, 



Bryum 40* . 



Burrows, Filled with callus 147, 



Buxus 75; 



Cabbage Weevil 187., 



Caeoma 177, 188, 



Oalp;j,i;^, Necessity of Calcium 44, 



Qai^-isfe^pn X6p, 



Callmj^ B6,,. ' '■ 



Cail-lus (p,Qtr,) e;),. 13f, External form 141, Origin 

 142, |.ife Pistpry 143, Histology 148. Con* 

 4it^ons of forx^aljion 150, Rlari^^y 15^. pr^ 

 gan fc^^jofa^ion ^n .callus 154 j Callus in'" 

 pryptogams 4-40, In herbapeovis planti^l42, 

 "KnariS" i^ cal^ys^ J.61f Wowd cork in callus 

 -._ _: _l..,lus in g^lls 168* 



