CONTENTS. 



PART I. 



Essays Touching the General Fact and Philosophy of 

 Evolution. 



Page 

 I. The Survival of the Unlike V.i 



II. Neo-Lamarckism and Neo-Darwinism 55 



III. The Plant Individual in the Light of Evolution. 



The Philosophy of Bud -Variation, and its Bearing 

 upon Weismannism 81 



IV. Experimental Evolution amongst Plants .... 107 

 V. Van Mons and Knight, and the Production of Varieties 138 



VI. Some Bearings of the Evolution-Teacliing upon Plant- 

 Cultivation 162 



VII. Why have our Enemies Increased ? 180 



VIII. Coxey's Army and the Russian Thistle. A Sketch of 



the Philosophy of Weediness 193 



IX. Recent Progress in American Horticulture 202 



PART II. 

 Essays Expounding the Fact and Causes op Variation. 



A. The Fact. Page 



X. On the Supposed Correlations of Quality in Fruits 219 



XI. The Natural History of Synonyms 237 



XII. Reflective Impressions of the Nursery Business . 245 



XIII. The Relation of Seed -Bearing to Cultivation . . 251 



B, The Causes. 



XIV. Variation after Birth 256 



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