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Year ponderosa pine pinus ponderosa var scopulorum produces pollen



Year ponderosa pine pinus ponderosa var scopulorum produces pollen



Southwestern Naturalist: 211-214



A greenhouse-grown P. ponderosa var. scopulorum produced pollen at the early age of 1 yr. Stress is hypothesized as the cause of the precocious cone-production. Pollen viability tests were negative.

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