IV.] VARIATION IN MAIZE. 127 



same thing, although they are labelled L. racemiforme of 

 Lange at Kew.* Lycopersicum Hnmboldtii, N, closely 

 resembles our garden tomato, and I should not be sur 

 prised if it proves to be only a racial offshoot of it 

 Dunal's L. agrinionuvfoUum is shown at 0, Miller's L 

 Peruvianum at P, and Phillippi's L. imhernlum at Q 

 This last I know only from the di-awing which Mr. Allen 

 sends me. The last two species, P, Q, are most unlike 

 the garden tomato tj'pes of any of the lot, yet they 

 are not so widely removed from them in foliage as the 

 Grandifolium and Upright sub -types are. 



Other Garden -Species. 



Similar observations respecting the evolution of 

 forms of specific importance could be made for most 

 species of plants Avhich have been widely cultivated for 

 a considerable length of time. The case is singularly 

 well illustrated in Indian corn. Maize has been very 

 uniformly accepted as a single species by botanists. 

 This arises mostly from the fact that corn is nowhere 

 known truly wild, and has, therefore, attracted little 

 attention from systematic botanists. There are some 

 authors, however, who have made species of some of the 

 marked cultivated types, either upon the hypothesis that 

 these forms must have been derived from distinct wild 



♦According to " Index Keweusis," Lycopersicum racemiforme of Lange should 

 be L. racemigcrum, Lange. The Currant tomato of American gardens is to all 

 appearances the same, and this was first referred to a botanical species — L. pim- 

 pinellifolium—m my Bulletin 19, Michigan Agricultural College, 1886. It is not 

 there recorded, however, that this determination was made tor me by Asa Gray. 

 Vilmorin's " Plantes Potageres'' calls the species Solatium racemi/lormn of 

 Dunal. The species seems to have been first described by Linnseus as Solanum 

 pimpinelli folium, and Philip Miller took up the specific name and attached it to 

 Lycopersicum. Dunal, however, ujwn the evidence of a specimen in Banks' 



