BIBLIOGRAPHY 267 



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 on which 

 reference 

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finds development of pigment is dependent on light, and 

 concludes, from experiments, that colour is not caused by 

 disease, but is a normal development and protects root-tip 

 from too intense light. p. 28 



313. Curtel, G., 'Recherches physiologiques sur les en- 

 veloppes florales,' C. R. Acad. sci., Paris, 1890, cxi, 

 pp. 539-541. 



Greater respiratory activity in coloured than in white 

 flowers. This energetic oxidation leads, among other 

 things, to formation of anthocyanin pigments from tannins. 



314. *Hieronymus, G., 'Beitrage zur Kenntniss der euro- 

 paischen Zoocecidien und der Verbreitimg derselben,' 

 Jahresber. Ges. vaterl. Cultur, Breslau. 1890, p. 49. 



Work on galls and connection of anthocyanin develop- 

 ment with these structures. p. 83 



315. *Laurent, E., 'Influence de la radiation sur la coloration 

 des raisins,' Comptes rendus des seances de la Socie.te Royale 

 de Botanique de Belgique, Bruxelles, 1890, xxix (2), p. 71. 



Colour of grapes develops in the dark. p. 88 



316. *Molisch, H., 'Blattgrun und Blumenblau,' Vortrdge 

 des Vereines zur Verbreitung naturtvissenschaftlicher Kennt- 

 nisse in Wien, Wien, 1890, xxx (3). 



Genera] account of anthocyanin is included, in which 

 author emphasises fact that drought favours development 

 of the pigment. p. 92 



317. 1891. Cockereil, T. D. A., 'The Alpine Flora: with a Sugges- 



tion as to the Origin of Blue in Flowers,' Nature, London, 

 1891, XLIII, p. 207. 



Preponderance of blue in high mountain flowers. 

 Suggestion that blue is metabolically the most complex 

 of the colours, and that great concentration of metabolism, 

 correlated with dwarf structure, may lead to the formation 

 of the most complex pigments in the inflorescence. 



318. *Heim, F., 'Influence de la lumiere sur la coloration du 

 perianthe de 1' Hiinantophyllum variegatum,' Bulletin 

 mensuel de la Societe Linneenne de Paris, 1891, n, p. 932. 



Intensity of coloration of flower is directly proportional 

 to the amount of light received. This is contrary to Sachs' 

 view that light does not influence colour so long as leaves 

 can assimilate. 



319. Massalongo, C., 'Sull' alterazione di colore dei fiori 

 dell' Amarantus retroflexus infetti dalle oospore di Cystopus 

 Bliti,' Nuovo Qiorn. bot. ital., Firenze, 1891, xxiu, pp. 165- 

 167. 



Anthocyanin is developed in the inflorescence when 



