112 



Hypnuni siihiniponeiis, Lesq. (129). 



Hypmun adimaun, Hedw. var. giganteum, Br. & Sch. (88). 



Description of Plate XCI. 



Figs. 1-5, drawn from J. B. Leiberg's specimens. 

 Figs, a and b, drawn from Dr. Braithwaite's specimen. 

 Figs, a and 4, hyaline toothed apices of the leaves. 

 Figs, b and 5, elongated basal cells. 

 Fig. 3, Old, ridged capsule. 



Botanical Notes. 



The Botanical Society of Western Pennsylvania is the name 

 of an organization estabUshed last October at Pittsburgh, " to 

 bring into communication those who are interested in Botany, to 

 advance their knowledge of the subject, and to create a more 

 wide-spread interest in the study of plants," in which praise- 

 worthy objects the editors of the BULLETIN wish the ofificers of 

 the new society the greatest success. Meetings are held monthly, 

 the fourth Thursday in every month, at the Pittsburgh Library. 

 From the calendar of the society recently received we learn that 

 the officers for i888-'89, are as follows: President, Dr. Wm. R. 

 Hamilton; Vice-president, Dr. A. Ziegler ; Corresponding Sec- 

 retary, Mr. J. D. Shafer ; Recording Secretary, Miss Willa Z. 

 Matthews ; Treasurer, Mr. C. C. Mellor. Over 50 members are 

 now enrolled. 



Heterogamy in Alniis serrulata. Passing along a road 

 fringed with Alnus serrulata near Yonkers, New York, the other 

 day, I was interested to note that one clump had no staminate 

 catkins, and that the pistillate ones were much more numerous 

 than in the normal monoecious type. A day or so later, other 

 plants showing the same peculiarity were observed in another 

 locality. These were marked so that they might be watched 

 next season. This entire absence of staminate catkins seems to 

 show a tendency on the part oi Almis to become dioecious. I 

 could, however, find no plants producing only male catkins, and 

 am interested to know whether any such have been observed by 

 others, and whether the peculiarity noted by me has been com- 

 mon elsewhere this spring. ALICE B. RiCH. 



[Androgynous catkins are recorded for this species from 



