Sere ting eer aac 
1888. ] BOTANICAL GAZETTE, 227 
tribe flowers, since, the flower being shallow, there is room 
for many stamens without crowding. 
We have observed that sternotribe flowers may become 
hototribe by inverting, and now it appears that nototribe 
flowers may become sternotribe by becoming shallow, or by 
having their stamens and styles exserted. .An observation 
of H. Miiller on the flower of Odontites serotina shows how 
n the foregoing it is claimed that the original visitors 
must have lighted on some part of the flower, and that the 
But some 
birds and — 
riginally mod- 
ifie by them and have been usurped by other visitors. 
mithout lighting. If they visit ro 
“y are not influenced by any place 0 ace ieee 
one nectary as convenient as another, so that there 1s : 
* Fertilization of Flowers, 446. 
See Foerste on L. nepetoides, Am. Nat. XVIII, 92. 
