BIBLIOGRAPHY 281 



Page of text 



on which 



reference 



is made 



423. 1888. Focke, W. 0.,. 'Die Verbreitung beerentragender 



Pflanzen durch die Vogel,' Abh. natw. Ver., Bremen, 1888, 

 x, p. 140. 



Examples of cases of distribution of fruits. p. 126 



424. 1889. *Ludwig, F., ' Extranuptiale Saftmale bei Ameisen- 



pflanzen,' Humboldt, 1889, vm, pp. 294-297. 



Red pigmented cushions and lines denote the path to 

 extra-floral nectaries (cp. honey-guides) in Impatiens, 

 Viburnum and Sambucus. 



425. 1891. Ludwig, F., 'Die Beziehungen zwischen Pflanzen und 



Schnecken,' Beihefte z. Bot. Centralbl., Cassel, 1891, i, 

 pp. 35-39. 



Red colour as a warning signal to animals. 



426. 1898. Knuth, P., Handbuch der Bluthenbiologie, Leipzig, 1898. 



(Handbook of Flower Pollination, Translated by J. R. 

 Ainsworth Davis, 3 vols., Oxford, 1906, vol. T, pp. 212-380.) 

 Full bibliography relating to biological significance of 

 anthocyanin. pp. 7, 126 



427. 1899. Macchiati, L., ' Osservazioni sui nettarii estranuziali del 



Prunus Laurocerasus,' 1 Boll. Soc. bot. ital., Firenze, 1899, 

 pp. 144-147. 



Anthocyanin as guide for insects to extra-floral 

 nectaries. 



ANTHOCYANINS AND GENETICS 



428. 1817. Hopkirk, T., Flora Anomoia. A General View of the 



Anomalies in the Vegetable Kingdom, London, 1817, 187 

 pages. 



An interesting account of variation in plants. A section 

 is devoted to variation in flower-colour, and lists of species 

 are given in which the colour varies from blue, purple, or 

 red, to white: red to blue, red to yellow, etc. Also 

 variation in colour of fruits. The causes of variation are 

 discussed. pp. 204, 217 



429. 1834. Schubler, G., und Lachenmeyer, C., 'Untersuchungen 



iiber die Farbenveranderungen der Bliithen,' J. prakt. 

 Chem., Leipzig, 1834, I, pp. 46-58. 



An account of the effect of different soils on the flower - 

 colour of Hortensia speciosa. Cases of change in colour 

 with varying age of flowers are mentioned (ex. Boragi- 

 naceae). p. 200 



430. 1849. Gartner, C. F. YOU, Versuche und Beobachtungen iiber die 



Bastarderzeugung im Pflanzenreich, Stuttgart, 1849. 

 Inheritance of flower-colour in hvbrids. 



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