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THE AMERICAN NATURALIST [Vol. LIII 



Of the total number of Mammoth phmts, i. e., 986, appear- 

 ms: iTi the Fo of the^e crosses, oiilv two were Green Mam- 

 moth, the rest beini>' tvpieallv of I^urley character. 

 Whether these two exeei)tions represent mixtures or re- 

 versions can not be stated. 



In tlie second q;toui:), one of tlie parents involved in the 

 oriiiuial cross was Green, the other being of Burlev 

 cliai-acKT. 



l-'roiii ihc (MOSS Connecticut Broadleaf ? X Burlev 

 :\I.niiniot,i !ir, r_ plant- \\eie o,o\mi of ^^hlch si\t> 

 nine were ot Maiimiolh hahil. Tlii> approximates the 

 tli(oi(ti<al latio !()-) 4 ?(. _> lioinili. oo.. MaiUand 

 Mammoth ?x W liiti Ihnhx txpi ol m V T) J F. plants 

 ^eieoioxMi, of N\hichfoit\ xsiieot M.minioth habit Thi, 

 figure is very close to the theoretical ratio 152/4 = 88. 

 Of the total number of :\rammoth ])lants, i. c, 457, which 

 appeared m the two (io--e^ (V)nne(ticnt Broadleaf $ X 

 Burlev :\Iammotli and Marvland Mammoth ? X AVhite 

 Buile\ t^pe80A o «ii \ two uci, ,,1 P,niU\ (oloi, the i est 



A\e wdl now consider the tiiird yroup, which involves 

 normal ureen color m both jvarents. 



From the cross (/onnecticiit P.roadleaf 9 X Marvland 



