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An 'albino' redwood is a redwood tree which is unable to produce chlorophyll, so has white needles instead of the normal green. To survive, it must join its roots to the roots of a normal redwood, usually the parent tree from whose base it has sprouted, from which it obtains nutrition as a parasite.〔 Only about 60 examples are known. These can be found in both Henry Cowell Redwoods State Park and Humboldt Redwoods State Park, with eight trees in the first. However, the exact locations are not publicized to protect the rare trees. They reach a maximum height of about 20 m (66 ft).〔 Other conifers lack the ability to graft their roots, so 'albino' mutants of other species do not survive to become sizable trees.〔 The trees were important to Native Americans and were recorded in their legends. For example, the Pomo people used them in their cleansing ceremonies. Ten cases are known of chimeric redwoods that have a mosaic of albino and normal tissues. Only a single chimeric redwood is known to produce cones. Formerly threatened by the Sonoma-Marin Area Rail Transit rail development, it has since been replanted. Image:Humboldt Redwoods 'albino'.jpg | An 'albino' redwood in Humboldt Redwoods State Park, northern California Image:Humboldt Redwoods 'albino' 2.jpg | Image:Albino Redwood closeup.jpg| Image:Albino Redwood Tree.jpg| ==Notes== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Albino redwood」の詳細全文を読む スポンサード リンク
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