164 BULLETIN OF THE BUSSEY INSTITUTION. 
abundant, and being sown immediately it all germinated in the follow- 
ing spring. When the flowers opened, two years later, they showed 
no sign whatever of the male parent. The pure white was without tint 
or spot; neither did the foliage and stem show the slightest trace of 
foreign influence. The plants were in pots. I removed a number of 
them to the greenhouse, and, having no pollen of L. speciosum at 
hand, fertilized them with that of L. auratum. Several refused to 
bear seed, while others produced it freely. The young plants resulting 
from this last experiment, bloomed in the greenhouses of the Bussey 
Institution in the spring of 1874. Neither L. speciosum, their grand- 
father, nor L. auratum, their father, had produced any effect whatever 
on the pure white of their petals. They showed differences of habit, 
among themselves, some being very tall and vigorous, and others com- 
pact and bushy, with a tendency to bloom in clusters, but these may 
have been mere seedling variations, with which the hybridization had 
nothing to do. Yet distinct evidence could be seen of the action of the 
alien pollen. Some of the anthers were small and abortive, and some 
of the pistils were imperfect ; but what was more to the purpose was 
the changed color of many of the former. The white petals had com- 
pletely resisted the foreign influence; but the yellow anthers had 
undergone a marked change. About half of them were turned to a 
chocolate color, approaching that of the anthers of the male parent, 
though not so deep. | 
I determined to try the effect of impregnation in the third genera- 
tion, and applied the pollen of both L. auratum and L. speciosum to 
ten or twelve of the young hybrids whose organs of reproduction 
appeared to remain perfect. Not one of them would bear seed. In 
the present summer, 1877, I repeated the experiment on a larger 
scale, and fertilized about fifty flowers, after removing the anthers 
before they had ripened. Nine of these produced seed-pods, all of 
which were small and deformed, except two. ‘These two contained, 
along with chaff, a few seeds of promising appearance. The remaining 
seven were full of chaff alone. The reproductive power had been 
nearly destroyed by hybridization repeated through three generations. 
What will result from the few seeds obtained, remains to be seen. 
Some lilies refuse to be fertilized by the pollen of certain other 
lilies. Thus I have found that L. speciosum, so readily fertilized by 
L. auratum, will give no seed to the pollen of either L. Browni, L. 
