psj3.orgpsj3.org/jp/papers/30_pdf/30(1)-25.pdf · Pinus densiflora 1 . Pollen grain in equatorial...
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psj3.orgpsj3.org/jp/papers/30_pdf/30(1)-25.pdf · Pinus densiflora 1 . Pollen grain in equatorial view showing ornamentation of the lobes of the saccus. x 800. 2 . Pollen grain in