BOTANICAL GAZETTE [JUNE 
2. The microsporangia reach maturity before the megaspo- 
rangia. ~ 
3. No archesporial cell or plate of archesporial cells is differ- : 
entiated in the microsporangium. . 
The tapetum is cut off from the outside of the sporoge- 
nous mass. — : 
i" Several archesporial cells are differentiated in the mega- 
sporangium, These cut off tapetal cells, by the divisions of — 
ther-cells become deep-seated. 
6. The megaspore mother-cell which is centrally located 
aelogs, and the megaspore near the chalazal end of the ovule 
AS eaally the auccessinl one. 
cells with aed walls and denser 
