264 BOTANICAL GAZETTE [OCTOBER 
The size of these cultures is given in table V. 
TABLE V 
Year |Generation| Parent ofseting | individuels lof pellescens| -Mutants 
grt.) Second | mutant 129 GE ean 1 rubrine 
TOUT US. Second | mutant 40 40 42 1 liquida 
EGES Third pallescens 69 69 Be ers Gees 
og ees bs pallescens 65 65 43 rnanela,. 2 
cana 
ret we es 45 Lamarckiana go 50 ° 1 scintillans 
rt lata, 1 al- 
inna _ Lamarckiana 56 50 OS han wae 
eens. hg rubrinervis 70 25 0. (bo isseaaeweree 
1004 ..:.: Fourth | pallescens 55 53 24 1 nanella 
ae ee a Lamarckiana 58 25 ed Pyne et 
eee t Lamarckiana 80 25 meee errno 
IOt5 4. Fifth pallescens 60 25 Me Tas ehh a 
The offspring of the 4 specimens of Lamarckiana had this 
uniform type, in the flowering specimens as well as in the other 
ones. These were examined in June and July when in large rosettes 
of radical leaves. The offspring of the mutant rubrinervis was also 
uniform and exactly resembled the race of this name in all its 
marks, and especially in the brittleness of its stems. The offspring 
of the original mutant, cultivated in 1911, embraced 129 plants, 
only 6 of which have flowered, the others having been destroyed 
before the significance of the culture had been realized. Among 
these 6, 2 were Lamarckiana, 3 pallescens, and 1 mut. rubrinervis. 
Their offspring were studied in 1913, as given in table V. Among 
the mutants the rubrinervis, liquida, scintillans, lata, and cana, as 
well as one nanella, flowered and proved their identity with the 
races of these names at that period. 
PEDIGREE OF MuT. pallescens NO. 2 
ro11..Mutant Mutant 
1913. .Second generation 28 percent pallescens ‘ Lamarckiana 1 mut. rubrinervis 
oe 
1914..Third generation 42 percent pallescens Lamarckiana lLamarckiana 
