

1891J Botanical Papers at the A. A. A. S. 257 



a comparison of the development with that of other Pterido- 

 phytes, and a discussion of the systematic position of the Os- 

 mundaceae. • 



On the phytogeny of the Archegoniata : Douglas H. Cam p- 



BELL. — In this paper, in a certain sense a sequel to the pre- 



ceding, Dr. Campbell detailed the different views held as to 

 the relation of Hepaticae and Musci to each other and to the 

 Pteridophytes, and stating the hypothesis as to the primitive na- 

 ture of the Eusporangiate Pteridophytes, the author claimed an 

 evident inter-relationship of the different groups of the Hepat- 

 icae, showing the connection between the thallose and foliose 

 Hepaticae, and between the former and the mosses. A com- 

 parison of the Pteridophytes and Hepaticae was followed by a 

 consideration of the relationships of the Pteridophytes inter sc, 

 of heterospory among the Pteridophytes, and of the relation 

 to Gymnosperms and Angiosperms. 



Further observations on a bacterial disease of oats: P. T. 

 Galloway. — After a brief review of the paper read on this 

 subject at the Indianapolis meeting, the life history of the or- 

 ganism was set forth, it being shown that the germ may pass 

 the winter on seed from diseased plants, on volunteer oats ami 

 to a limited extent in .the soil. The characteristics of the 



germ as regards its behavior on different culture media were 

 given, together with the results of inoculation experiments. 

 In conclusion the experiments in combating the disease and 

 the results obtained were given. 



A new Nectria: B. D. Halstld. — The stem rot of sweet 

 potato is a puzzling disease. As the decay begins near tin 

 surface of the ground, and works in opposite directions, usu- 

 ally several fungi are found in the affected parts. A species 

 of Fusarium is uniformly abundant upon the aerial decaying 

 stems. Early in June an ascigerous fungus was found upon 

 the underground portions of the young plants and was first 

 thought to be a form of black rot. It is. however, a Nectria 

 and somewhat closelv related to Nectria Vaiuhe Warh 



Notes upon bacteria of 



B. D. Hals 1 1:1. .— Mel- 



--w*w^F ti/'L'^*- t'(£ltt/ * C» 1/ +0T wm -m- -— - 



ons, squash and cucumber plants have suffered from a bac- 

 terial disease during the present year in New Jersey. 1 lv 

 stem decays near the ground and the leaves wilt and "melt 

 away. The germs are ova! in shape and inoculations <> 

 healthy plants were successfully made by means of a flamed 



