Pollen-containing male flowers form conspicuous drooping catkins on gray birch. MIKE BOTTINI
Pollen-containing male flowers form conspicuous drooping catkins on hickory. MIKE BOTTINI
Pitch pines release pollen from male staminate cones. MIKE BOTTINI
Pollen-containing male flowers form conspicuous drooping catkins on gray birch. MIKE BOTTINI
Pollen-containing male flowers form conspicuous drooping catkins on hickory. MIKE BOTTINI
Pitch pines release pollen from male staminate cones. MIKE BOTTINI
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