|A smooth, 3-pored,
grain with a sub-triangular polar view and sub-oblate
equatorial view (Godwin, 1975). The surface sculpturing
is faintly rugulate, with tiny scabrae on the ridges (Moore,
et al. 1991) but usually appears smooth after preparation.
The grain is very similar to Myrica gale (sweet gale)
and the two are difficult to separate (Edwards 1981),
often shown on pollen diagrams as a composite Coryloid
curve. Myrica is more robust with a thicker exine and
more pronounced pores.
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of a Corylus
photo of a Corylus avellana grain