Jan 7, 2025 · Each alder tree has both male and female flowers. Appearance: The catkins which house the male flowers are up to 6cm long. Young catkins appear green before turning yellow and releasing pollen in February.

Nov 16, 2022 · An alder tree flower is a type of slender, conical flower cluster called a catkin. Alders are also monoecious trees—meaning they have male and female flowers on the same tree. The female flowers turn into the recognizable stiff, woody cones that alder trees are known for.

Jul 25, 2024 · The most notable features of all varieties of alder trees are their catkins and strobiles. Both male and female flowers (catkins) appear on the trees. The plant is wind-pollinated. When the female flowers are pollinated, they mature into small cones (called strobiles).

Jul 14, 2022 · Alder (Alnus glutinosa) – The Tree with Cone-Like Catkins. The alder tree is unique because it produces both male and female flowers simultaneously. Here’s how to identify them: Size: Can grow up to 6 cm long. Color: Green when young, turning yellow as they mature. Growth Pattern: Hang in long clusters from branches.

Learn to identify the Common Alder, a tree often found near rivers and lakes. Look for its rounded, notched leaves and long catkins.

Alder is the food plant for the caterpillars of several moths including the alder kitten, pebble hook-tip, the autumnal and the blue-bordered carpet moth. Catkins provide an early source of nectar and pollen for bees, and the seeds are eaten by the siskin, redpoll and goldfinch.

Nov 4, 2019 · Female catkins grow on the same tree. They are ½-¾ inches in diameter and resemble pinecones that mature from bright green to woody brown. They contain tiny fruit called winged nutlets that are built for wind travel.