CONTENTS Xlll 



Fruit — Geographical — Classification — Key to Groups of Genus 



Rubus 350-354 



Blackberries — Key to Species of Blackberries — Rubus nigro- 

 baccus — Rubus nigrobaccus X R. villosus — Rubus argutus — 



Rubus cuneifolius 354-355 



Dewberries — Key to Principal Species of Dewberries — Rubus 

 trivialis — Rubus invisus — Rubus vitifolius — Rubus villosus. .355-357 

 Raspberries — Key to Principal Species of Raspberries — Rubus 

 occidentalis — Rubus idaeus — Rubus strigosus — Rubus stri- 



gosus X R. occidentalis — The Loganberry — Mayberry 355-358 



Fragaria (Strawberry) — Roots and Stems — Leaves — Inflores- 

 cence and Flowers— Fertilization, and Development of the 

 Fruit — The Mature Fruit — Geographical — Principal Fruit- 

 bearing Species — Key to Principal Species of Fragaria — 

 Fragaria virginiana — Fragaria vesca — Fragaria chiloensis — 

 Varieties — Origin of New Varieties — Uses — References 358-365 



CHAPTER XXVIL— Pomaces (Apple Family). 



Habit, Leaves — Inflorescence — Flowers — Fruit — Geographical 



— Key to Important Genera of Pomaceae 366-367 



Malus (Apples) — Stems — ^Leaves — Inflorescence — Flowers and 

 Their Development — Pollination and Fertilization — Self- 

 . sterility and Self-fertility— Effects of Strange Pollen— Par- 

 thenocarpy — The Fruit and Its Development — Key to Principal 

 Species of Malus — Malus floribunda — Malus baccata — Malus 

 angustifolia — Malus coronaria — Malus ioensis— Malus soul- 

 ardii — Malus sylvestris — The Classification of Apples — Com- 

 position — Cider and Vinegar — Dried Apples — Production of 



Apples in the United States 367-384 



Pyrus (Pear) 384 



Pyrus communis (Common Pear) — Stem — ^Leaves and 



Flowers — Fruit — Geographical 385 



Pyrus serotina culta (Sand, Japanese, or Chinese Pear) — Self 



-sterility in Pears — Dwarf Pears 385-387 



Cydonia (Quince) —Cydonia oblonga (Common Quince) — 

 Stem — ^Leaves — Flowers — Fruit — Varieties — Uses — Refer- 

 ences 387-390 



CHAPTER XXVIIL— Drupace^ (Plum Family). 



Habit, Stems — Leaves — Flowers — Fruit 391-394 



Prunus — Key to Main Groups of Genus Prunus 394 



Plums — Stems — ^Leaves — Inflorescence — Flowers— Fertiliza- 

 tion — Fruit — Classification of Plums — Key to Principal 



Species of Plums 394-397 



Discussion of Species — Prunus domestica — Prunus insititia— 



