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nounany of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by sporestype of:
Definition that contains fern
- bracken fern of southeastern Asia; not hardy in cold temperate regions
- marsh fern fern having pinnatifid fronds and growing in wet places; cosmopolitan in north temperate regions
- indian button fern fern of tropical Asia having round buttonlike bulbils
- mountain bladder fern fern of rocky mountainous areas of hemisphere
- pityrogramma argentea fern of southern tropical Africa having fronds with white undersides
- walking leaf ferns having lanceolate fronds that root at the tip
- thelypteris palustris pubescens fern of northeastern North America
- button fern fern of New Zealand and Australia having trailing fronds with dark green buttonlike leaflets
- campyloneurum augustifolium fern with shorter and narrower leaves than Florida strap fern; Florida to West Indies and Mexico and south to Argentina
- dryopteris fragrans fern or northern Eurasia and North America having fragrant fronds