Pseudoannual

In the pseudoannual rings of the root, the zones of tracheal tubes are separated from each other by rows of lignified tracheids.

Having detected pseudoannual growth zones by the methods already described, an attempt was made to find out how to identify them in nature.

A few red oak species have pseudoannual fruit maturation, that is, the fruit appears annual because the branches bearing the fruit did not elongate the following year ( Engelman , 1876-1877 ; Nixon , 1993 ) .

These so-called pseudoannual species are characterized by the absence of a persisting shoot system that connects shoots longer than one vegetation period. One of these pseudoannuals is T. europaea.