284 Self- Sterility in Plums, Cherries, and A^yples 



of these self-sterile kinds pollinisers must be planted ; (3) that provided 

 that a variety produces plenty of pollen and flowers simultaneously with 

 the variety which it is intended to pollinate, any variety, at least of 

 plums and apples, will probably serve for this purpose, apart from the 

 special case of the Coe varieties of plums and their presumable co- 

 derivative; Jefferson. 



The paper by Stout published in this volume gives (p. 102) references 

 to the more important papers on the physiology of self-sterility. To 

 these may be added the following, relating for the most part to horti- 

 cultural observations made in this country. 



REFERENCES. 



(1) Backhouse, W. O. Rep. Brit. Ass. 1911, p. 599. 



(2) . Gard. Chron. Oct. 28, 1911, p. 299. 



(3) . Gard. Chron. Nov. 23, 1912, p. 381. 



(4) Berry, G. P. ""Investigations in Cherry Orchards." Journ. Bd. Agr. Vol. 



XXIV. p. 288. 



(5) Chittenden, F. J. "Pollination in Orchards I. II. III." Journ. R. H. &'. 



Vols. XXXVII. p. 350, XXXIX. p. 366, p. 615. 



(6) MiDDLEBROOKE, W. J. " Pollination of fruit-trees." Journ. Bd. Agr. Vol. xxii. 



p. 418. 



(7) Waite, M. B. " Pollination of Pear Flowers." U.S.A. Dept. Agr. Div. Veg. 



Path. Bull. 5, 1894. 



Self-Sterile 

 Coe's Golden Drop ^ 

 Coe's Violet 

 Crimson Drop 

 Jeff6rson 

 Bryaaston Gage 

 McLaughlin's Gage 

 Early Green Gage 

 Old Green Gage 

 Reine Claude d'Althan 

 Pond's Seedling 

 Wyedale 



Frogmore Orleans ) 

 Late Orleans ) 



Prune d'Agen 



Primate (small numbers of 

 Flowers selfed, but no 

 other cross on tree) 



Frogmore Damson 



PLUMS. 

 Partly Self -Fertile 

 Rivers' Early Prolific 

 Early Favourite 

 Cox's Emperor 

 Early Orleans 

 Farleigh Damson 



Self-Fertile 

 Denniston Superb 

 Early Transparent 

 Reine Claude Violette 

 Golden Transparent 

 Reine Claude Bavay 

 OuUin's Golden Gage 

 Belle de Louvain 

 Monarch 

 Prince Eugelbert 

 Prune G^ante 

 Gisborne 

 Victoria 

 Czar 

 Pershore 



Yellow Magnum Bonum 

 Early Mirabelle 

 Myrobalan Red 

 Belgian Purple 



