Florida Flowers and Insects 297 
serving merely as a protection to the stamens on the 
lower side. The banner is folded longitudinally. At 
base it enfolds the stamens, wings and keel and is itself 
enfolded by the calyx tube. ‘Access to the nectar is on 
each side of the free filament. The stamens are of 
unequal length, so that the anthers form a pollen surface 
12 mm. in length. They are enclosed in the infolded ban- 
ner, but their tips are slightly exposed below. Visitors 
must have a proboscis 14% inches or more to reach the 
nectar conveniently. The stigma stands among the an- 
thers and may easily receive their pollen, but the way 
neglected flowers fall seems to show that self-fertiliza- 
tion does not occur. It is evidently adapted to humming 
birds, and dusts their throats with pollen. F. 26-Ap. 29. 
Brrps (1)—Trochil.: Trochilus ab. 
Lupinus Dirrusus, Ma., R.—Often the plants grow in 
clusters a few feet across, which increases the conspicu- 
ousness of the flowers. The racemes are erect and densely 
flowered. 
The flower is 15 mm. long. The banner has its blade 
entirely exposed, since it has mainly an attractive func- 
tion. At base it runs forward and is creased so as to 
give a head-rest to bees depressing the keel. It is blue 
with a longitudinal white spot, which forms a path-finder. 
It is nearly orbicular, 12 mm. across. 
The wings form a colored envelope of the keel. They 
are coalescent at tip and move with the keel so as to keep 
it concealed. 
The keel is faleate, without color, and is bent abruptly 
upward, ending in a sharp beak, as in Crotalaria. The 
keel petals are coalescent above and below, leaving a 
small opening at the tip. 
