268 BIBLIOGRAPHY 



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infected with Cystopus. Suggestion that inflorescence 

 thereby becomes attractive, and possibly spores may be 

 disseminated by insects in consequence. 



320. Noll, F., 'Einfluss des Lichtes auf die herbstliche Ver- 

 farbung des Laubes,' Verh. nathist. Ver., Bonn, 1891, XLVIII, 

 p. 80. 



Autumnal coloration dependent on exposure to light. 

 Natural photographs, in green on a red ground, obtained 

 by the shading of one leaf by another. 



321. Rathay, E., 'Ueber eine merkwiirdige, durch den Blitz 

 an Vitis vinifera hervorgerufene Erscheinung,' Denkschr. 

 Ak. Wiss., Wien, LVIII, 1891, pp. 585-610. 



Action of lightning in bringing about formation of 

 anthocyanin is due to the same effect as ' ringing ' of 

 stem. 



322. 1893. Gain, E., 'Sur la matiere colorante des tubercules et 



des organes souterrains,' Bui. soc. bot., Paris, 1893, XL, 

 pp. 95-102. 



Author measured the amount of pigment in tubers of 

 Solanum tuberosum (red-tubered variety) and Helianthus 

 tuberoses grown both in wet and dry ground. More pig- 

 ment developed in dry ground when conditions otherwise 

 the same. 



323. Landel, G., 'Influence des radiations solaires sur les 

 vegetaux,' C. R. Acad. sci., Paris, 1893, cxvn, pp. 314-310. 



Effect of sun and shade on development of anthocyanin. 



324. *NienhailS, C., 'Die Bildung der violetten Pflanzen- 

 farbstoffe,' Schweiz. Wochenschr. Chem., Zurich, 1893, 

 No. 39. 



Author investigates the formation of anthocyanin in 

 fruits of Solanum niyrum, and notes that coloration begins 

 at places where air penetrates, i.e. wounds, stomata. Con- 

 cludes, however, that oxidation is not essential to formation 

 of all blue and violet pigments. 



325. Vochting, H., 'Ueber den Einfluss des Lichtes auf die 

 Gestaltung und Anlage der Bluthen,' Jahrb. wiss. BoL, 

 Berlin, 1893, xxv, pp. 149-208. 



When leaves of certain plants were deprived of light, 

 and were thus unable to assimilate, it was found that 

 flowers did not develop anthocyanin. p. 85 



326. 1894. Ktistenmacher, M., 'Beitrage zur Kenntniss der Gallen- 



bildungen mit Berucksichtigung des Gerbstoffes,' Jahrb. 

 wiss. Bot., Berlin, 1894, xxvi, pp. 82-185. 



Work on galls, and hence connection of anthocyanin 

 with the same. p. 83 



