42 
The Bulletin 
PLATE IV 
Photomicrographs of pollen grains of Vitis 
rotundifolia 
Pig. 1. Pollen from a staminate vine, Dark Male 
Ho. 1 
Pig. 2-4. Pollen from the three types of vines of the 
Pi generation when Hope is selfecl 
Pig. 2. Pollen from a staminate vine 
Pig. 3. Pollen from a hermaphrodite vine with up¬ 
right stamens 
Pig. 4. Pollen from a hermaphrodite vine with re¬ 
flexed stamens 
