226 BOTANICAL GAZETTE [ SEPTEMBER 
to changes in different species it is found that the lactic acid 
bacteria develop to an overwhelming degree while the gas bac- 
teria and the peptonizing germs are gradually destroyed. 
CuarLes R. Barnes: Terminology of reproduction and reproduc- 
tive organs.—Two points were discussed, which are not directly 
related : , 
(1) The distinction between vegetative and non-sexual repro- 
duction. The reproduction of the earliest plants was undoubtedly 
vegetative reproduction. Non-sexual reproduction is not fairly 
differentiated from it until the Bryophyta are reached, and with 
them a clear alternation of generations. In Bryophyta, Pterido- 
phyta, and Spermatophyta, the forms of vegetative reproduction, 
viz., by brood buds or gemme, by detached shoots, and by pro- 
liferation (with detachment late when it occurs at all) are clearly 
distinguishable from the non-sexual form, viz., by spores pro- 
duced ina compound sporangium. The fundamental distinction 
lies in this, that vegetative reproduction repeats the same phase, 
while non-sexual reproductiongzves rise to thé alternate phase. 
(2) The classification of sporangia and gametangia into si™m- 
ple and compound was suggested. The simple gametangium of 
Sporangium is one consisting of a single cell whose contents 
become respectively the gametes or the spores. The compound 
gametangium or Sporangium is an aggregate of several or many 
(rarely reduced to one) simple gametangia or sporangia Sut 
rounded by one or more layers of sterile protective cells. 
Oogonia and carpogonia are simple gametangia, archegonia are 
compound gametangia. Simple sporangia occur below Bryo- 
phyta ; compound in Bryophyta and above. 
BertHa Stoneman: A comparative study of the development of 
some anthracnoses in artificial cultures. — Different species of Glao- 
sporium and Colletotrichum, and the allied genera Vermiculari@ 
and Volutella, present in artificial cultures distinct characters 
varying to a certain extent with varying conditions of light 
temperature, and nutrient media. Under uniform conditions of 
