BIBLIOGRAPHY 263 



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279. 1874. Chargueraud, A., 'Observations sur la coloration des 



feuilles a I'automne,' Rev. hortic., Paris, 1874, pp. 34-36. 

 Remarks on causes of autumnal coloration. 



280. Chargueraud, A., 'Influence du froid sur la coloration 

 des feuilles du Phalaris picta,' Rev. hortic., Paris, 1874, 

 pp. 248-249. 



Formation of anthocyanin in white portions of varie- 

 gated leaves of P. arundinacea picta when exposed to 

 frost. 



281. 1875. KrauS, C., 'Pflanzenphysiologische Untersuchungen. 



7. Ueber die Einwirkung von Pflanzensauren auf Chloro- 

 phyll innerhalb der Pflanzen,' Flora, Marburg, 1875, 

 xxxni, pp. 365-368. 



Acidity of cell-sap augments the formation of antho- 

 cyanin. 



282. 1876. Askenasy, E., 'Ueber den Einfluss des Lichtes auf die 



Farbe der Bluthen,' Bot. Zlg., Leipzig, 1876, xxxiv, 

 pp. 1-7, 27-31. 



Investigations on various plants as to whether they 

 require light for the production of normal colour in flowers. 



pp. 5, 85, 88 



283. Haberlandt, G., 'Untersuchungen liber die Winter - 

 farbung ausdauernder Blatter,' SitzBer. Ak. Wiss., Wien, 

 1876, LXXIII (1), pp. 267-296. 



Account of winter reddening of leaves. Reddening due 

 to low temperature at night and bright light by day. 



284. Mer, E., 'Des phenomenes vegetatifs qui precedent ou 

 accompagnent le deperissement et la chute des feuilles,' 

 Bui. soc. hot., Paris, 1876, xxin, pp. 176-191. 



Observations on the reddening of leaves of Cissus 

 quinquefolia. pp. 31, 91 



285. Schell, J., 'Wirkung einiger Einfliisse auf die Farbung 

 der Pflanzen,' Beilage zu dem Protocolle der 75. Sitzung 

 der Naturforscher-Gesellscha/t an der Universitdt zu Kazan, 

 Kazan, 1876. Reference in Justs boL Jahresber., Berlin, 

 1876, iv, p. 717. 



Effect of light and temperature on reddening of seed- 

 lings of Polygonum, Rutnex, etc. p. 89 



286. 1877. Mer, E., 'Recherches sur les causes des colorations 



diverses qui apparaissent dans les feuilles en automne et 

 en hiver,' Bui. soc. hot., Paris, 1877, xxiv, pp. 105-114. 



Anthocyanin no connection with chlorophyll. Forma- 

 tion of pigment as a result of injury caused by animal and 

 vegetable parasites. Oxygen necessary for the appearance 

 of pigment. 



