1886. ] A Study of the Dandelion. d. 
perhaps by human selection. Thus two form-species of maize, 
when crossed, have not produced intermediates in their crop, but 
the parent types without intermediates, and the continuous plant- 
ing of the progeny tended toward a complete separation into the 
original types. Various crossings of a like kind, made at the 
Experiment station, seem confirmatory of this view, and seem to 
suggest in addition that seeming sports are often the result of 
atavism. 
Appended are a few of the variations which are to be found in 
the leaves of the dandelion, selected rather as representative than 
as exceptional. A series could ‘readily have been selected show- 
ing a passage from one type to another, as frequently leaves of 
quite different appearance appear on the same plant. 
* 
Varieties of Dandelion leaves. `" 
