1. Hardy palmately branched North American fern with divergent recurved branches borne on lustrous dark reddish stipes
   - American maidenhair fern, five-fingered maidenhair fern

Type of: maidenhair, maidenhair fern

• unobservable
• unobservant
• unobserved
• unobserved fire
• unobstructed
• unobtainable
• unobtrusive
• unobtrusively
• unobtrusiveness
• unobvious
• unoccupied
• unoffending
• unofficial
• unofficially
• unoiled
• unopen
• unopened
• unopposable
• unopposed
• unordered
• unorganised
• unorganized
• unoriented
• unoriginal
• unoriginality