MAKIXa X/:W h-JXDS OF PLAXT8 



447 



has been sowu, the origin of the Broad Evening 

 Primrose from it has been observed. It is possible 

 to identify this and other new species in the seedling 

 stage. Fig. 250 shows the difference in the appeai'- 

 ance of the seedlings of (Enothera LamareMana and 

 (Enoiliera lata: wliile the strikingly small and pale 



251). ilutatious obtaiued by ^uwiug seed of Lamarck's Evening 

 Primrose TjT)ical Lamarck's Evening Primro8e on the 

 left, Pale Evening Primrose in the middle, and Broad 

 Evening Primrose on the right. 



leaves of (Enothera alhida, another of the new species, 

 contrasts with both the other two species. Most of 

 the other new species (of which there are several) 

 can be identified in the seedling stage; so that they 

 can be early transplanted and isolated from each 

 other. This greatly facilitates the handling of the 

 specimens, and makes it possible to deal with much 

 larger numbers than would otherwise be the case. 



Professor de Tries' ideas may Ije well illustrated 

 l:)y means of his experiments on the Eed Clover. 

 Every one knows that four- and five-leaved Clovers are 

 found occasionally. Beginning with a plant which 



