Early in spring, often in March, long before trees begin to leaf out, the swollen red buds of Silver Maple (Acer saccharinum) begin to open, revealing the flowers within. Typically, most of the buds on a given tree bloom at the same time; in fact, if there are several Silver Maples in an area, they will usually all flower within days of each other. Most of the flowers on any given tree are of the same gender, so there are male and female trees.
The flowers of maples are wind-pollinated and lack petals (which would hinder dissemination of the pollen). Therefore, the flowers are not large and flashy, and often escape notice. Flowering before leaves emerge also enhances pollen dispersal. The flowers are generally either male or female. If you look closely at the male flowers, what you will see are bundles of stamens, sometimes red and sometimes yellowish-green, tipped with yellow pollen. Female flowers have reddish clusters of pistils forming clumps of bristly little balls along the branches. The pistils develop petal-like extensions at the tips called stigmas, which are receptors for the pollen. (Photo: Silver Maple buds opening; inset = male Silver Maple flowers)
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Silver maple (Acer saccharinum) is second only to skunk cabbage when it comes to early spring flowering. Even with our nights still well below freezing, silver maple trees are bursting with blossoms. This close relative of red maple bears its male (pictured) and female flowers separately, sometimes on the same tree and sometimes not. Silver maple’s sap can be tapped and boiled into syrup, but the yield is much less, and it’s only about half as sweet as that of sugar maple.