| 单词 | ditch fern |
| 释义 | ditch fern (extremely rare) n WORD FAMILY ditch fern n large deeply rooted fern of worldwide distribution with upright bipinnate compound tufted fronds Syn|Hyper French bracken, Osmunda regalis, king fern, royal fern, royal osmund flowering fern, osmund any fern of the genus Osmunda: large ferns with creeping rhizomes; naked sporangia are on modified fronds that resemble flower clusters |
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