284 BIBLIOGRAPHY 



Tage of text 

 on which 

 reference 

 is made 



450. 1888. Pammel, L. H., 'Color Variation in Flowers of Del- 



phinium,'' Bot. Gaz., Crawfordsville, Indiana, 1888, xm, 

 p. 216. 



Record of colour varieties of D. tricorne occurring 

 naturally. 



451. 1889. *Focke, W. 0., 'Der Farbenwechsel der Rosskastanien- 



blumen,' Verh. hot. Ver., Berlin, 1889, xxxi, pp. 108-112. 

 Changes in colour in flowers after fertilisation. 



452. Kerner von Marilaum, A., 'Ueber das Wechseln der 

 Bliithenfarbe an einer und derselben Art in verschiedenen 

 Gegenden,' Oest. Bot. Zs., Wien, 1889, xxxix, pp. 77-78. 



The distribution of different colour varieties of any 

 species may be determined by colour contrast (and con- 

 sequent attraction for insects) with flowers of other species 

 amongst which it grows. 



453. 1890. Jacobasch, E., ' Verschiedene Bliitezeit der rot-, blau- 



und weissblutigen Form von Hepatica triloba Gil. und 

 Umwandlung der Normal form in die Rote,' Verh. bot. Ver., 

 Berlin, 1890, xxxi, pp. 253-254. 



Observations on the time of flowering of different 

 colour-varieties. Author suggests that cold may cause 

 variation in colour. 



454. *K6rnicke, ' Varietatenbildung im Pflanzenreiche,' 

 Sitzungsberichte der niederrheinischen Gesellscha/t fur 

 Naturkunde, Bonn, 1890, pp. 14-20. 



Mention is made of the influence of soil on the colour 

 of plants. A case is quoted where development of red and 

 violet colour in Maize-cobs, due to effect of soil, is said to 

 have taken place. 



455. 1891. Eckert, J. P., 'Some Peculiar Changes in the Colour of 



the Flower of Swainsonia procumbens,' Nature, London, 

 1891-1892, XLV, p. 185. 



The corolla is at first lilac, but changes later to crimson 

 in places and blue. Petals may assume original colour and 

 go through the gradations once more. 



456. 1892. Guinier, E., 'Sur la coloration accidentelle de la fleur 



du Fraisier commun,' Bui. soc. bot., Paris, 1892, xxxix, 

 pp. 64-66. 



An account of the occurrence of a variety of strawberry 

 with reddish-purple flowers. p. 155 



457. 1893. Gillot, X., 'Observations sur la coloration rosee ou 



erythrisme des fleurs normalement blanches,' Bui. soc. 

 bot., Paris, 1893, XL, pp. clxxxix-cxciv. 



List of species in which flowers of the types are 

 without anthocyanin, and which give rise to varieties 



