hypogynous
adjective
hy·pog·y·nous hī-ˈpä-jə-nəs 
1
of a floral organ : inserted upon the receptacle or axis below the gynoecium and free from it
2
: having hypogynous floral organs
hypogyny
hī-ˈpä-jə-nē
noun 
Word History
Etymology
borrowed from New Latin hypogynus, from hypo- hypo- + -gynus -gynous
First Known Use
1821, in the meaning defined at sense 1