sectioned before we know which type is predominant.

"The anthers of type one are greatly shriveled, and a band of
deeply-staining collapsed cells apparently represents the remains
of archesporial or pollen-forming tissue.

"The anthers of type two are normal in appearance, but the
pollen-mother-cells degenerate before pollen grains are formed. A
comparison of the degenerate pollen-mother-cells of this plant with
normal pollen-mother-cells is given below:"

[Illustration: Sections of anthers of the Weschcke Hickory Carya ovata

_Illustrations by Dr. McKay showing pollen degeneration in Weschcke
hickory._]

This substantiates the conclusion that I had arrived at previous to this
report, that this hickory is able to mature its nuts early in the fall
by reason of not having to waste its energy in the production of pollen.
(There is only one other variety of hickory which I have grafted on
bitternut which has proved unable to mature pollen and it is the Creager
from Iowa.) I was immensely pleased to find that it responded very well
to Bridgewater pollen, a high percentage of the blooms treated with it
developing mature nuts. The results with the Kirtland pollen were almost
equally good, the poorest showing coming from those branches treated
with Beaver pollen on which only three mature nuts developed. (The
Beaver is presumed to be a hybrid between bitternut and shagbark
hickories.) Sixty-two nuts from these pollinizations were planted in the
fall of 1941 in rodent-proof seed beds. In the spring, counting
germination, I found 100% of these nuts had sprouted and grown into