In cell biology, an organelle (/ ÉËr É¡ É Ë n É l /) is a specialized subunit within a cell that has a specific function. Individual organelles are usually separately enclosed within their own lipid bilayers.
Salix babylonica, commonly called weeping willow or Babylon weeping willow, is a medium to large deciduous tree with a stout trunk topped by a graceful broad-rounded crown of branches that sweep downward to the ground.It grows to 30-50â (sometimes to 60â) tall and as wide. It is native to China.ark is gray-black. Branchlets are typically green or brown. This weeping willow can be a spectacular specimen at the edge of a pond with its branches gracefully weeping down to touch the water, however, it is often very difficult to site this tree in a residential landscape.
The weeping âPendulaâ cultivar was developed in Holland in 1884; North American cultivation began in 1907. Though the species can grow up to 90 feet tall in its native habitat, the weeping Alaskan cedar generally grows to 50 feet tall with a 20-foot spread when grown as an ornamental.ommon pests of the weeping Alaskan cedar include juniper scale, bagworms, beetle borers, spruce mites and spider mites. Diseases include tip, twig and needle blights, root rot, rust and phytophora.