Usnea:
"Usnea" is a genus of mostly pale grayish-green fruticose lichens that grow like leafless mini-shrubs or tassels anchored on bark or twigs.203 The genus is in the Parmeliaceae family.
en.wikipedia.org
鬍鬚地衣:
鬍鬚地衣是一種梅衣科的屬，叢生，外表黃色或微綠色。
zh.wikipedia.org
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Usnea鬍鬚地衣