| 单词 | Osmunda clatonia |
| 释义 | Osmunda clatonia (extremely rare) n WORD FAMILY Osmunda clatonia n North American fern having tall erect pinnate fronds and a few sporogenous pinnae at or near the center of the fertile fronds Syn|Hyper interrupted fern 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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