89 
The accompanying illustration (Fig. 9) shows the bud and 
central parts of a flower of Passiflora alato-coerulea from our 
conservatories. The passion flowers are characterized by having 
stamens and pistils raised on an androgynophore. But in the bud 
the parts are practically on the receptacle, the same as in Mitos- 
temma and other members of the family. The development of 
the flower of Passiflora is therefore suggestive of the direction of 
evolution of the family. 
Similarly in Glaucium flavum (Fig. 9) from our outdoor col- 
lections. The poppy family is characterized by a rather broad 
stigma. But in the bud we see a form of stigma more like the 
buttercup family. 
Again, in the flower of Narcissus Pseudo-Narcissus, the crown 
is equal in length to the free perianth-segments, in the bud it is 
less than half as long, more like Narcissus poeticus, suggesting a 
direction of evolution different from that adopted in standard 
works. Other studies have been made of the flowers of Cactaceae 
and Aigzoaceae. 
DOOR OD.O00og0an 
O09 O02 
ae 
ODOR 
I*tc. 9. Horned Poppy (Glaucium flavum). Longitudinal section of bud 
showing Buttercup-like stigma in the bud, and (at the right) the mature 
broad stigma characteristic of the Poppy Family. Fuller explanation in the 
text. (7021 
