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In the northern hemisphere, leafout may occur as early as February depending on the climate and is stimulated by air temperature. If daytime highs reach 10 °C (50 °F) for a few consecutive days, a willow will attempt to put out leaves and flowers.
American pussy willow (Salix discolor), native to northern North America. Before the male catkins of these species come into full flower they are covered in fine, greyish fur, leading to a fancied likeness to tiny cats, also known as “pussies”. The catkins appear before the leaves, and are one of the earliest signs of spring.
Flowers. Salix nigra is a medium-sized deciduous tree, the largest North American species of willow, growing to 10–30 m (35–100 ft) tall, exceptionally up to 45 m (148 ft), with a trunk 50–80 centimeters (20–30 in) diameter.
Salix caroliniana flowers in the early spring, either before or together with the emergence of leaves. In Alachua County, Florida in 1982, flowering was recorded during February and March. [3] The species was first described by French naturalist André Michaux in 1803 in his Flora Boreali-Americana. [4] The male flowers provide pring pollen for ...
The leaves are paler than most other willows because they are covered with very fine, silky white hairs, in particular on the underside; they are 5–10 cm long and 0.5–1.5 cm wide. The flowers are produced in catkins in early spring and are pollinated by insects .
The leaves are 3–12 cm long and from 2–8 cm wide, broader than most other willows. The flowers are soft silky, and silvery 3-7-cm-long catkins are produced in early spring before the new leaves appear; the male and female catkins are on different plants .
This tree is mostly deciduous during the winter, but can start growing back leaves early during warm snaps in the winter. Yellow flowers grow in drooping catkins. In female red willows, the catkins turn into tufts of cottony seeds, which are windborn, often in large quantities, for 2-3 weeks in the spring. [4] Flowering Time: Dec--Jun [5]
Salix tetrasperma, commonly called Indian willow, is a medium-sized tree of wet and swampy places, shedding its leaves at the end of monsoon season. It flowers after leafing. It flowers after leafing.