64 
the 
basis of notes taken during one or more seasons ; many corrections 
ate summer and fall. The varieties were rearranged on the 
in the names of the varieties were made. 
A large number of seedlings have been grown. Several dif- 
ferent collections of seed were obtained froni Japan through Mr. 
S. Tanaka. Several different crosses involving various iris have 
been made during the past few years, and many of these bloomed 
during the past season. 
Additional watercolor drawings of varieties and species were 
made by Miss Louise B. Mansfield. The varieties selected repre- 
sented different types from the standpoint of color and form. 
SYSTEMATIC BoTANyY 
By ALFRED GUNDERSEN 
ee) 
The Classification of Dicotyledons 
During the past year I have continued studies on relationships 
of families of dicotyledons, especially as connected with the de- 
velopment of flowers. .\s the systematic section of the plantations 
is laid out according to the Engler system, the classification be- 
comes more evident than in a printed form. I have been inter- 
ested in making comparisons in particular between the Engler, 
Wettstein, Bessey, and Hutchinson systems, in so far as they re- 
late to the dicotyledons, These systems are alike in numerous 
respects. I have been occupied with a study of the differences. 
Comparisons with which I have been especially concerned are: 
Resemblances between families in the orders Parietales and Papa- 
verales. 
Resemblances between Caryophyllales and Primutales. 
The systematic position of the somewhat isolated families Cactaceae 
and Aristolochiaceae. 
Many drawings have been made by Miss Maud Purdy, showing 
the comparative morphology of the flower buds and adult flowers 
other 
jer 
in these groups. Interesting changes in placentation an 
characters relating to the directions of floral evolution have been ob- 
served. Some of these studies were presented before the Torrey 
Sotanical Club in March and were published in Vorreya for De- 
cember. 
