ai2 BOTANICAL GAZETTE [OCTOBER 
18. An extensive micropylar haustorium and a more simple 
chalazal one develop from the endosperm. 
19. The embryo possesses a short suspensor. 
20. The bivalent chromosomes in both megasporogenesis and 
microsporogenesis show X’s, Y’s, and V’s. 
21. A multipolar spindle appears in the prophase of the hetero- 
typic division in microsporogenesis. 
22. The nucleus of the microspore has but a short period of rest; 
the prophase of division is initiated early and persists for some time. 
In conclusion, I wish to thank Professor MARGARET C. FERGU- 
son for her careful reading of this paper and for her very helpful 
suggestions. 
WELLESLEY COLLEGE 
WELLESLEY, Mass. 
LITERATURE CITED 
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pls. 1-6. 1899 
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