Contents v 



CHAPTER X 



PAGES 



The Miner Group 58-59 



Pomological importance — Botanical position — Prunus 

 hortulana mineri — Probable mongrel origin — Charac- 

 ters — Hardiness. 



CHAPTER XI 



The Wayland Group 60-66 



History of the treatment of this group — Its name — 

 Prunus rivularis — Origin of the varieties geographi- 

 cally considered — Genealogy of the group — Identity 

 of the group with Prunus rivularis — Pomological 

 characters — Distinctness — Adaptations. 



CHAPTER XII 



The Wildgoose Group 67-69 



History of Prunus hortulana — Characterization — Bo- 

 tanical position — The present view of Prunus hor- 

 tulana — Popularity of the varieties — Blossoming. 



CHAPTER XIII 



The Chicasaws . . . . . . . . 70-73 



Geographical range — Possible nativity — Wild char- 

 acters — Blooming — The fruit — Uses — The species in 

 cultivation. 



CHAPTER XIV 



The Sand Plum 74-78 



Personal paragraph — Description — The fruit — Nat- 

 ural range — The Sand plum in a Kansas garden — 

 Named varieties — Behavior in cultivation. 



CHAPTER XV 



The Hybrid Plums 79-85 



The beginnings — The first monograph — Possibilities — 

 Origin of the Hortulanas — Hybridization in nature — 

 Hybridization in the orchard — Hybrids in groups — 

 Tests of hybridity— Pedigree vs. external charac- 

 ters — Intermediateness of character — Caution — Diffi- 

 culties foreseen — The classification of hybrids — Lim- 

 its and affinities in crossing — The utility of various 

 species in hybridizing. 



