Abstract
The normal sequence of pollen development in Douglas fir is described and is essentially the same as that for Pinus. Mature pollen grains normally consist of five cells: two lens-shaped prothallial cells, a stalk cell, a body cell, and a large tube cell. The normal sequence of development is described as well as the structure and histochemistry of the spore wall. Possible reasons are given for earlier misinterpretations of pollen development and spore wall structure in Douglas fir.
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