490 
thus giving two cases in one spring in such widely separated 
places, may be justly regarded as being uncommonly susceptible 
to pistillody. 
Staminody occurred freely on a birch tree (Betula populifolia), 
in the suburbs of Racine. The pistillate catkins bore stamens for 
a half inch or more from the end. 
Teratology. Two items which seem worthy of record will be 
mentioned. A Trillium grandiflorum was found in which a stamen 
and a petal were united edge to edge, one anther cell being Oh 
literated by the union. It did not seem to be a case of reversion, 
as only the normal number < petals were present. A Rheum 
Rhaponticum stamen was: seen which bore on its apex the fila- 
ment of another stamen. This second stamen was perfect, and, 
in every observable detail, like any other in the flower. This oc- 
currence of stamens, “tandem,” as it were, reminds one of the 
prolification of the rose, giving one peduncle from the centre of 
another flower, but any such phenomenon among stamens has 
never come to my notice before. 
2 F. L. STEVENS. 
SyracusE, N. Y., July > 1894. 
Alge Exsiccate. The undersigned have made preparations 
for the issuing of sets of dried specimens of the North Amefi- 
can Alge, both of the fresh and of the salt waters, for the aid ee 
investigators and to assist in the development of a better knowr 
edge of the North American species. Contributions a sets of 80° 
specimens each are solicited. 
FRANK S. COLLINS, 
Wiiiiam A. SETCHELT, © 
Isaac HOLDEN. — a 
All interested are requested to address Frank S. Ci 97. 
Dexter St., Malden, Mass. 
Lemna Valdiviana Philippi. I have collected and. ernie 
a large number of sheets of the Lemna Valdiviana, eecenly ie - 
covered by Dr. Geo. G. Kennedy in Randolph, Mass. - oe 
Station is an interesting one, the plant will be desired by “oe 
ists, and I shall be glad to send it to anybody who may wu 
, WALTER Deane 
: : = 9 BREWSTER Smee, CAMBRIDGE Mass., November, - 
