| 单词 | autumn fern | 
| 释义 | autumn fernnoun  : a shield fern (Dryopteris erythrosora) native to eastern Asia that is widely cultivated as an ornamental for its triangular, evergreen fronds which are copper-colored when young before turning a glossy, dark green  Autumn fern has colorful fronds that emerge copper-colored in spring, then unfurl with a pinkish tinge before turning glossy green in summer.  called also Japanese shield fern | 
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