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The rhythm of flower bud development in hardwoods and S. sibirica.


, : The rhythm of flower bud development in hardwoods and S. sibirica.. Bjulleten' Moskovskogo Obscestva Ispytatelej Prirody (Otd. Biol.). 63: 6, 107-15

Investigations showed that in hardwoods that flower when leafless (Corylus avellana, Alnus glutinosa, Betula verrucosa), pollen formation in the flower buds takes place in the summer of the year before flowering. In others, that flower and flush at the same time (Aspen, Poplar, Oak), pollen formation begins in autumn, is interrupted in the winter, and is completed in the following spring.

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