Names and Histories. 199 



Periods of Caltivation and Native Countries of Plants, continued. 



Pumpkin and Squash. Over 500 years ; temperate N. 

 America. 



Quince. Over 4,000 years ; North of Persia, south of the 

 Caucasus, Anatolia. 



Radish. Over 2,000 years ; temperate Asia. 



Rampion. Less than 2,000 years ; temperate and south- 

 ern Europe. 



Rape. Over 4,000 years ; Europe, Western Siberia (?). 



Rice. Over 4,000 years ; India, southern China (?). 



Rye. Over 2,000 years ; Eastern temperate Europe (?), 

 South-east of Europe, Algeria. 



Salsify. Less than 2,000 years (?); south-east of Eu- 

 rope, Algeria. 



Sea Kale. Less than 2,000 years; Western temperate 

 Europe. 



Scorzonera. Less than 2,000 years ; South-west of Europe. 



Shaddock. Over 2,000 years ; Pacific Islands. 



Shallot. Less than 2,000 years ; unknown wild. 



Spinach. Less than 2,000 years ; Persia (?). 



Sorghum. Over 4,000 years ; tropical Africa (?). 



Strawberry, Chili. Less than 300 years ; Chili. 



Strawberry, Virginia. Less than 300 years ; temperate 

 N. America 



Sunflower. Very ancient ; U. S. 



Sweet Potato. Very ancient ; tropical America. 



Tomato. Over 500 years ; Peru. 



Turnip. Over 4,000 years ; Europe, western Siberia (?). 



Watermelon. Over 4,000 years ; tropical Africa. 



Wheat. Over 4,000 years ; region of the Euphrates. 



