1894. ] Notes on Dédoublement. 465 
Podophyllum peltatum. The numerical floral plan given by 
Eichler in his Bliithendiagramme, 2: 137, based upon the 
work of Payer and Baillon, assumes a ternary arrangement of 
the stamens, of which the outer circle contains three stamens, 
and the inner zzze stamens in three groups of three stamens 
each, each group being consid- 
ered a single but compound sta- 
i" =\ men. That this is not a correct 
S 
O2n g, interpretation can be readily seen 
( o€ Yc by one having access to abundant 
v e fresh material. The typical plan 
WH is undoubtedly ternate (fig. 4). 
aed As is well known from aberrant 
—) occurrences and from _ other 
Fig. 4. species, the leaves are not truly 
opposite, but alternate, the terminal flower having on this ac- 
count the appearance of appearing higher up on the side 
of one of the petioles. This fact has been emphasized 
in the diagrams. The three bracts and six sepals are in- 
troduced in accordance With the interpretation of Asa Gray, 
which accords with the general ternate structure of the petals 
and stamens. The position and number of the petals and 
stamens and of the placenta of the ovary are taken from an 
occurrence actually at hand at the time the drawing was pre- 
pared. There are evidently three petals, with which de- 
Cussate three more petals, and with these as a whole decus- 
Sate first six stamens, and then again six stamens. Nothing 
can be more improbable than the peculiar occurrences of 
ternary dédoublement assumed by these distinguished au- 
rs. 
Dayton, Ohio. 
