12 AMERICAN FERN JOURNAL 
this time than those in diffused light. It was found that 
the spores of this species germinate irregularly. Thus 
a sowing of spores examined twelve weeks after sowing 
showed all stages from mature prothallia down to spores 
just germinating. Also leaves collected in March fur- 
nished spores which germinated well in cultures. 
It may be noted finally that the writer of the article 
under review has further experiments of the same sort 
now under way and would undoubtedly appreciate the 
sending of spore-bearing leaves of any ferns frequenting 
dry situations, of Pellaeas, species of Cheilanthes, and 
any others. Such specimens may be sent to him at 
Pullman, Wash. 
ie Be 
Notes on IsorTES 
During the spring of 1909, I collected some Isoétes in 
a small, artificial pond, back of Stanford University, 
University, California. 
With some other ferns, I sent a sheet of this Isoétes 
to the Society Herbarium. Mr. Hopkins was inter- 
ested in the plant and I sent all the material I had to 
him. The specimens were collected too early to be in 
the best condition, but after a careful study of the plants, 
Mr. Hopkins gives the following data: 
r 
p 
a 386, shay ~ Hoge 386, 386, 368, 522, microns. 
lerospores 26, 26, 30, 24, 24, 28, 24, 24, 24, 24, 24, 24 
26,28, 28:96 Se tetas 
GELMANNI A. Br. 
