Red catkins of Port Orford Cedar, chamaecyparis lawsoniana, and cones, Corvallis, Oregon, USA.

Heartnut, Juglans ailantifolia, Side view of long green catkins and new leaves emerging on the end of a twig.

Alder, Alnus lanata, Close view from underneat of a cluster of catkins in the spring, against blue sky.

Dune willow, Salix hookeriana, Close side view of backlit catkins emerging on a twig against dappled light.

Alder, Grey Alder, Alnus incana, Front view of a bunch of male catkins.

Alder, Grey Alder, Alnus incana, Front view of a bunch of male catkins and a cone from the previous year behind.

Catkins of Hazel, Corylus avellana, covered in hoary frost, on a twig against a soft focus snowy background.

Hazel, Corylus avellana, Snow covered catkins on a twig against a soft focus snowy background.

Birch, Betula.

Pussy Willow, Salix caprea.

Birch, Betula.

Hazel, Cob-nut, Corylus avellana.