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Willow species are hosts to more than a hundred aphid species, belonging to Chaitophorus and other genera, [16] forming large colonies to feed on plant juices, on the underside of leaves in particular. [17] Corythucha elegans, the willow lace bug, is a bug species in the family Tingidae found on willows in North America.
Description. 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. The bark is dark brown to blackish, becoming fissured in older trees, and frequently forking near the base. [ 3]
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. The bark is rough, with deep, vertical fissures and the young shoots leaves are silky. The leaves are lance-like, or ovate-lancelike, 8–15 cm long, with minutely and ...
Salix alba, the white willow, is a species of willow native to Europe and western and central Asia. [ 2 ] [ 3 ] The name derives from the white tone to the undersides of the leaves. It is a medium to large deciduous tree growing up to 10–30 m tall, with a trunk up to 1 m diameter and an irregular, often-leaning crown.
Salix discolor, the American pussy willow [2] or glaucous willow, [3] is a species of willow native to North America, one of two species commonly called pussy willow.. It is native to the vast reaches of Alaska as well as the northern forests and wetlands of Canada (British Columbia east to Newfoundland), and is also found in the northern portions of the contiguous United States (Washington ...
It is a deciduous shrub reaching 4–7 metres (13–23 ft) in height, exceptionally 7.6 m (25 ft) [4] spreading by basal shoots to form dense clonal colonies.The leaves are narrow lanceolate, 4–12 centimetres (1 + 1 ⁄ 2 – 4 + 3 ⁄ 4 in) long and 2–10 millimetres (1 ⁄ 16 – 3 ⁄ 8 in) broad, green, to grayish with silky white hairs at least when young; the margin is entire or with ...
Salix × fragilis is cultivated as a fast-growing ornamental tree. The cultivar 'Russelliana' (syn. S. × fragilis var. russelliana) is by far the most common clone of crack willow in Great Britain and Ireland, very easily propagated by cuttings. It is a vigorous tree commonly reaching 20–25 m (66–82 ft) tall, with leaves up to 15 cm long.
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 ( dioecious ). The male catkins mature yellow at pollen release, the female catkins mature pale green. Female catkins. Male catkins. The fruit is a small capsule 5–10 mm ...