112 
Spiraea Bumalda. BUMALDA SPIRAEA. 
Location: Fruticet 
Hybri 
Spiraea Humalda var. Anthony Waterer. ANTHONY WATERER 
PIRAEA. 
Location: Fruticetum. 
Hybri 
Spiraea canescens. CUNEATE SPIRAEA. 
Location: Fruticetum. 
Natural distribution: Asia. 
CONFERENCE NOTES FOR MARCH 
The March conference of the scientific staff and registered 
students of the Garden was held in the laboratory of the museum 
building on the afternoon of March 6 
The program for this conference was as follows: 
“ American species of Riccia,’’ by D . A. How 
ee in plant and animal on ” by ae W.C. Twiss. 
Marshall A. Howe discussed ‘“‘The Ricciaceae of North 
e r f 
the “North American Flora.’’ After the general morphological 
cHARACte ry, of na family were SE WES it was remarked that all 
d 
generic an 
in the United States, and the chdeaceeneties of the rouse Riccia, 
Ricciocarpus, and Oxymiira mee. which are admittedl 
genera, and of Ricciella and Thallocarpus, which should perhaps 
d ” : sues 
these being of particular interest in recording changes of form 
nto the usual broad form. The characters which seem to be 
most dependable in distinguishing species were discussed. 
