308 BOTANICAL GAZETTE [ OCTOBER 
TWO MEGASPORANGIA IN SELAGINELLA. 
(WITH ONE FIGURE) 
ProressorR Bower records’ finding two sporangia subtended by 
the same sporophyll of Lycopodium rigidum. In my work on Selaginella 
rupestris 1 have recently found two instances of the same irregularity. 
In both cases they were megasporangia, and were placed not side by 
Fic. 1.—Longitudinal section of a megasporophyll of Selaginella rupestris, 
showing two megasporangia in nearly median longitudinal section. From a photo- 
micrograph. 
side as in the Lycopodium described by Professor Bower, but as if the 
additional sporangium was developed in the line connecting the nor- 
mal megasporangium with the ligule, as shown in the figure. The two 
sporangia are of equal size, and no smaller than the other sporangia 
in the same cycle. The figure shows the normal reduction of the 
megaspores to one or two, so common in Selaginella rupestris, as 
recorded by the writer..—FLorence M. Lyon, Zhe University of 
Chicago. 
5 Bower, F. O., Note on Pane plurality of sporangia in Lycopodium rigidum 
Gmel. Ann. Botany 17: 278-280. 1903. 
® Bot. GAZ. 32:138. 1901. 
