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Proceedings of the International Plant Propagator's Society

Vol. 14

Title:
WHITE PINE WITCHES' — BROOM SEEDLINGS

Author:
Alfred J. Fordham

pp: 116-118

Abstract:
Last year at the St. Louis Meeting, I presented a series of slides depicting this white pine witches'-broom which grows in the Berkshire Hills of western Massachusetts. It has fruited and shed seeds for many years. Within its dispersal area over 200 genetically dwarf forms were found. In the intervening year some of its seeds have been germinated thereby providing an opportunity to observe the behavior of its progeny. The next slide shows the small twig and cone characteristics of the broom when compared with those of normal pine. These cones when compared with those taken from a normal tree show the variety of subnormal sizes which it produced.

Far fewer viable seeds were produced than would be expected in normal cones for many were abortive. However, 154 were acquired from the limited number of cones available.

On September 20, 1963 the seeds were separated into two lots and started on a stratification period of three months at 40 degrees. The first lot contained 135 seeds while the

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