Proceedings Am. Philos. Soc. Vol. LVI. No. 7 



Plate VI 



Fig. I. Longitudinal section of anther showing area of reinforced cells 

 on outer side, vascular tracts, pollen loculi with reinforced cells in the septa, 

 and thin exothecium separating off. Pollen grains in loculi and dark cells 

 of nectary at base of stamen. (Cam. luc.) X /O. 



Fig. 2. Transverse section of anther showing pollen loculi, vascular 

 bundle, and areas of reinforced cells. (Cam. luc.) X 340- 



Fig. 3. Longitudinal section of cells of reinforced area of anther show- 

 ing lignified rib thickenings. (Cam. luc.) X 5oo. 



Fig. 4. Transverse section of reinforced area of anther, showing lignified 

 ribs. (Cam. luc.) X 5oo. 



