SOME SPECIES OF POTENTILLA. 277 
The mark x indicates a partial resolution of a stamen into two, the 
filament bearing two anthers. 
It will be seen from the above that, while P. peduncularis and P. 
Calabra have a tendency to vary, both in the antisepalous and anti- 
petalous stamens, P. inclinata varies only in the antisepalous ones. 
In the last-mentioned species, it is remarkable how frequently a 
partial or complete resolution of an antisepalous stamen into two takes 
place. 
B. Species exhibiting a tendency to reduction in the number of 
stamens :— 
P. sericea, L. (?). 
— Parapetalous Antisepalous Antipetalous 
eisndinod, stamens. stamens. stamens. 
Seneca | NESCeMERN A 5 5 
D dos IB Qmd d 5 4 
: E 19: eee eee 5 3 
P. maculata, Pourret (P. alpestris, Hall.). 
to eee ee Antipetalous 
r ERE ee 10:5, zu us 9 4 
E uw 10:.— 5. o 5 a 
Iu Es Is o E 4 8 
DEN 18 uu xD 4 2 
B3 SEES l9 lb 4 i 
l1 x0 I0 v —. 5 1 
P. opaca, L. (P. intermedia, Nestler). Six flowers were examined ; 
four were normal, while the other two each wanted one antipetalous 
stamen. 
P. Fragariastfum, Ehrh. In this species a great number of flowers 
have the andreecium reduced to the 10 parapetalous stamens. Of 
better-developed andreecia, I have noted the following :— 
antipetalous stamens is — by five figures, these five figures represent 
the ner of stamens in front of the five sepals or five ve petals respectively, and 
Fade noted down didis: as they may be read off bt round the 
ow 
