414 THE SURVIVAL OF THE UNLIKE. [XXV. 



stance of the recent Crystal City. I have also tried to 

 cultivate it, and its response, like the Crystal City, is 

 mostly in leaves and runners, not in any permanent 

 or striking modification in fruit. It is true that the 

 botanical features of the garden strawberries and the 

 var. lUinoensis are much alike, particularly in her- 

 barium specimens, and for some time I was not able 

 to separate them readily ; but there are botanical 

 characters, even aside from habit, which distinguish 

 them. The garden strawberries are lower in habit, 

 producing runners freely only after fruiting, with 

 shorter petioles and more leaves springing from the 

 crown of the plant, and the leaves are spreading, — all 

 of which are striking peculiarities of the Chilian 

 plant, — while in the Illinoensis the leaves stand up 

 on long nearly perpendicular stalks, and the runners 

 are produced at flowering time ; the leaflets are thick 

 and firm in texture, broader than in Illinoensis and 

 lacking the long, narrow base of the native, with 

 mostly rounder teeth, and they are particularly dis- 

 tinguished by the dark upper surface and the bluish - 

 white under surface of the mature leaflets, the color 

 of the leaflets in the native plant being light, lively 

 green, with little difference between the two surfaces. 

 In these points of difference, too, the garden berries 

 are characteristically like the Chilian. The truss or 

 inflorescence is different in the two. In the garden 

 berries, the truss stands more or less oblique, or is 

 often prostrate, and it is broken up into two or three 

 strong, often unequal spreading arms, from which 

 the short and stout fruit -stems spring, and this is the 

 distinctive habit of the Chilian species ; in the Illino- 

 ensis, the truss is erect, and it breaks up more 



