Phenology of Cone and Shoot Development of Noble Fir and Some Associated True Firs

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External development of male and female strobili, from bud burst to maturity, and of vegetative shoots was studied on noble, Pacific silver, grand, and subalpine firs. The various stages in strobili development are described and illustrated. The sequence in bud burst, male buds first and vegetative last, was consistent for all species. Pollen shedding and female receptivity were well synchronized, although cool moist weather appeared to delay onset of pollen shedding. Synchronization on individual trees makes self-pollination readily possible. Differences in timing of phenological events occurred between locations, years, and species, with noble fir being the last to develop. Forest Sci. 16:356-364.

Keywords: Abies spp; frost damage; seed production and dispersal; selfing

Document Type: Journal Article

Affiliations: Pre-Doctoral Research Associate, College of Forest Resources, University of Washington, Seattle

Publication date: September 1, 1970

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