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A catkin or ament is a slim, cylindrical flower cluster (a spike), with inconspicuous or no petals, usually wind-pollinated (anemophilous) but sometimes insect-pollinated (as in Salix). It contains many, usually unisexual flowers, arranged closely along a central stem that is often drooping.
Amentotaxus is a genus of conifers (catkin-yews) comprising five species, treated in either the Cephalotaxaceae, or in the Taxaceae when that family is considered in a broad sense. The genus is endemic to subtropical Southeast Asia, from Taiwan west across southern China to Assam in the eastern Himalaya , and south to Vietnam .
Two flowering male catkins from a goat willow tree (Salix caprea).Pussy willow used as Lunar New Year decoration. Easter postcard (Germany, 1902) Pussy willow is a name given to many of the smaller species of the genus Salix (willows and sallows) when their furry catkins are young in early spring.
'Melanostachys', also known as the black pussy willow, is known for its jet-black male and female catkin blooms which appear in early spring. Its male catkins also have red anthers, which slowly turn soft yellow from pollen. It has gained the Royal Horticultural Society's Award of Garden Merit. [3] [4]
Female alder catkins after shedding their seeds Alnus serrulata male catkins. Alders are trees of the genus Alnus in the birch family Betulaceae.The genus includes about 35 species [2] of monoecious trees and shrubs, a few reaching a large size, distributed throughout the north temperate zone with a few species extending into Central America, as well as the northern and southern Andes.
The flowers are wind-pollinated catkins produced in late winter; the male catkins are pale yellow, 5–10 cm (2–4 in) long, while the female catkins are bright red and only 1–3 mm (1 ⁄ 16 – 1 ⁄ 8 in) long.
It is dioecious, with male and female catkins on separate trees; the male catkins are 4–5 cm long, the female catkins 3–4 cm long at pollination, lengthening as the fruit matures. When mature in midsummer, the female catkins comprise numerous small (4 mm) capsules , each containing numerous minute seeds embedded in silky white hairs, which ...
Young tree in natural habitat American chestnut male (pollen) catkins. Castanea dentata is a rapidly-growing, large, deciduous hardwood eudicot tree. [20] A singular specimen manifest in Maine has attained a height of 115 feet (35 m) [21] Pre-blight sources give a maximum height of 100 feet (30 m) and a maximum circumference of 13 feet (4.0 m). [22]