cypripediums is cypripedium's Plural Form

cypripedium

US 
UK 
  • n.杓兰(属)；兜兰(属)
Plural Form：cypripediums  Plural Form：cypripedia  

E-C

n.
1.
杓兰(属)
2.
兜兰(属) (Paphiopedilum)