Assertion: flowering fern | /r/Synonym | those of the ostrich fern
Facets:
Source sentences:
text: In Japan, fiddleheads of flowering fern (Osmunda japonica), known as zenmai (薇), as well as those of the ostrich fern (Matteuccia struthiopteris), known as kogomi (コゴミ), are commonly eaten in springtime.