Definition of parsley fern
: any of several plants with finely cut foliage that suggests that of parsley: such as a : a tansy (Tanacetum vulgare) b (1) : a lady fern (Athyrium felix-femina) (2) : a European rock brake (Cryptogramma crispa) that has a short creeping or ascending rhizome and densely tufted leaves of which the outer are sterile and the inner fertile and that grows chiefly on acid upland soils in cool regions (3) : rock fern c
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