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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.
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 pulchra is a species of flowering plant in the willow family, known by the common names diamondleaf willow, tealeaf willow, and thin red willow. [1] It is native to northern North America, where it occurs in Alaska, Yukon, the Northwest Territories, and Nunavut. The species is also found in northern British Columbia, and occurs in Russia. [2]
This willow is a shrub growing to 2 to 3 m (6.6 to 9.8 ft) tall, [2] and known to reach 5 m (16 ft) at times. [3] The stems and twigs are hairless. The leaves are lance-shaped to oval and are up to 11 cm long by 3.3 wide. They are hairless. The inflorescence is a catkin. [3]
The flowers are yellow catkins, 3–8 cm (1 + 1 ⁄ 4 – 3 + 1 ⁄ 4 in) long, produced in the spring with the leaves. The reddish-yellow fruit matures in late spring or early summer, and the individual capsules are 4–6 millimetres (3 ⁄ 16 – 1 ⁄ 4 in) long. [5] [6] The peachleaf willow grows very quickly, but is short-lived.
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 eriocephala, known as heart-leaved willow or Missouri River willow, is a species of willow native to a large portion of the temperate United States and Canada. [ 2 ] [ 3 ] [ 4 ] It is usually found as a narrow shrub or small tree with multiple trunks growing to a height of 20 ft (6.1 m).
Its apicies are can be acute to obtuse. The stipules of S. lasiolepis can appear absent or leaf-like, and its petioles are hairy. [8] The flowers are unisexual. Male (staminate) flowers feature yellow catkins 1.7–5.5 centimetres (0.67–2.17 in) long, and female (pistillate) flowers have green catkins 1.5–6 centimetres (0.59–2.36 in) long ...