Salix L.

Leaves linear to obovate; usually less than 5 cm wide. Flowers with 1 or 2 elongated nectaries Salix

Trees or shrubs not with a column shape; completely deciduous

Trees with one to several trunks 10–20 m high. Leaves linear to oblanceolate more than 3 times as long as broad. Catkins emerging with leaves

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Trees with spreading or ascending branches

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Twigs fragile at junctions, breaking with a snap. Leaves glossy green above, becoming glabrous on both surfaces

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Leaf margins with course uneven glandular teeth. Leaves 6–15 cm long, glabrous from first; dark green above. Petiole with 2 glands towards the top. Male catkins 4–6 cm long, 10 mm wide. Rootlets red. Tree up to 20 m high. Widespread. Near fresh water. Introd. from Europe. Fl. spring. Crack Willow Salix fragilisfragilis

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Leaf margins with many small even glandular teeth. Leaves silky but becoming glabrous on upper surface. Male catkins 6–8 cm long, 8 mm wide. Spreading tree to 16 m high. Widespread in riverbeds. Introd. from Europe. (hybrid between S. fragilis var. fragilis and S. alba var. vitellina) s. rubens