150 
same kinds of cells produces vegetative and floral structures that 
are quite different in appearance, a fact well illustrated by the 
leaves possessed by the four plants shown in Plate CXXI]. 
While the investigations indicate that the supposed graft- 
hybrids mentioned in this brief survey are in nature periclinal 
chimeras, the production of a true graft-hybrid due to vegetative 
cell-fusion is still to be considered possible. In fact, Dr. Winkler 
has presented proof that such is the case with the plant Solanum 
Darwinianum, which appeared on an adventitious branch that 
arose from a decapitated graft. It appears that certain if not all 
of the tissues of this plant are composed of cells derived from the 
actual fusion of tomato with nightshade cells which involved also 
nuclear fusion. This is at the present time the only true graft- 
hybrid kno 
The om oe of solanum-nightshade chimeras especially 
noted in this article will be propagated along with other plant 
chimeras at the New York Botanical Garden in the effort to 
e€ a representative collection of these interesting ne for 
pane 
A. B. Srovt. 
THE PROTECTION OF OUR NATIVE PLANTS 
In August, 1901, the Misses Olivia and Caroline Phelps Stokes 
presented to the New York Botanical Garden a fund of $3,000, 
the interest of which was to be used for the protection of native 
plants. Various methods have been tried, beginning with a 
series of three prizes for essays on this subject, offered first to the 
teachers and older persons, which resulted in a good series of 
— the best of which were printed in the JoURNAL OF THE 
RK BoTANICAL GARDEN in 1902 and ae The prize 
essays were written by Dr. F. H. Knowlton, U. S. National 
Museum, Washington, D. C.; Miss Cora H. ce oe of 
James Freeman Clarke, of Boston; Dr. A. J. Grout, boys’ high 
school, Brooklyn; Miss Mary Perle Anderson, supervisor of 
nature study, Unwersity. School for Girls, eos Ill.; Miss 
Jean Broadhurst, of Teachers College, N. Y. C.; Mr 
Gordon Copp. 
