220 The Botanical Gazette. [April, 
the bulbs of which were obviously swollen with mature macro- 
spores. The gathering was not studied closely until winter. 
So it comes that I cannot here give measurements of micro- 
spores; but in place of doing so, I have to announce that / 
riparia is polygamous 
All the plants collected in August were found to bear ma- 
ture macrospores all the way to the center. The whole 
gathering, minus a quantity pressed and sent away for ex- 
changes, consisted of about twenty-five plants. It afforded 
not a single microsporangium. Only two or three immature 
leaves in the center of each plant were without spores of any 
kind. The number of leaves was as large as usual, and in 
some cases larger. 
of another outer aspect, but the spores showed them to be / 
uite re- 
fourths 
ms of 
rim between the hemispheres were also jagged and q 
markably high. The velum was broad, covering three- 
Some smaller plants, collected in August, 1895: e 
Chester, rather darker green in color, were monoec 
wrsivig much as in some forms of /. saccharata. 
these Spores, and those from some Chesapeake plants, 
admit of distinguishing descriptions. 
The microspores of J. riparia vary, by actual measufe 
