Pertaining to, or resembling, a natural order
   (Orchidaceae) of endogenous plants of which the genus Orchis is the
   type. They are mostly perennial herbs having the stamens and pistils
   united in a single column, and normally three petals and three sepals,
   all adherent to the ovary. The flowers are curiously shaped, often
   resembling insects, the odd or lower petal (called the lip) being
   unlike the others, and sometimes of a strange and unexpected
   appearance. About one hundred species occur in the United States, but
   several thousand in the tropics.