224 BOTANICAL GAZETTE [SEPTEMBER 
the differentiation during ontogeny admitted by zoologists. They 
desire to believe that most plant cells can reproduce the whole 
plant. But this is a belief and not a fact, and until it becomes a 
fact it is well to recognize this plausible alternative in considering 
matters such as periclinal and sectorial chimeras as well as endo- 
sperms. 
HARVARD UNIVERSITY 
LITERATURE CITED 
1. Cortins, G. N., Heredity of a maize variation. U.S. Dept. Agr. Bur. 
Plant Ind. Bull. 272. pp. 7-23. IQr3. 
2. Correns, C., Bastarde zwischen Maisrassen mit besonderer Beriicksichti- 
gung der Xenien. Bibliotheca Botanica 53:1-161. 1901. 
3- CouLTEr, J. M., The endosperm of angiosperms. Bor. Gaz. 51:380-385. 
4. Courter, J. M., and Cuampertaty, C. J., Morphology of angiosperms. 
Pp. x+348. New York. 1909, 
5. DeVries, H., Sur la fécondation hybride de albumen. Compt. Rend. 
Acad. Sci. 129:973-975. 1899. 
6, East, E. M., The Mendelian notation as a description of physiological 
facts. Amer. Nat. 46:633-655. 1912. 
7. East, E. M., and Haves, H. K., Inheritance in maize. Conn. Agr. Exp. 
Sta. Bull. 167. pp. 1-141. IQII. 
8. Emerson, R. A., Inheritance of color in the seeds of the common bean, 
Phaseolus vulgaris. Ann. Rep. Neb. Agr. Exp. Sta. 22:67-101. 1 
0. , Aleurone colors in F, in a cross between non-colored varieties of 
maize. Amer. Nat. 46:612-615. 1912. 
10, Gulcnarp, L., Sur les anthérozoides et la double copulation sexuelle chez 
les végétaux angiospermes. Rev. Gén. Botanique 11: 129-135. 1899. 
si. NAWASCEHIN, S., Resultiite einer Revision des Befruchtungsvorgangs bei 
Lilium Martagon wnd Fritillaria tenella. Bull. Acad. Imp. Sci. St. Péters- 
bourg g: no. 4. 1899. 
12, Wesser, H. J., Xenia, or the immediate effect of pollen in maize. U.S. 
Dept. Agr., Div. Veg. Phys. and Path. 22: I~44. 1900. 

