perigynous
adjective
pe·rig·y·nous pə-ˈri-jə-nəs 
: borne on a ring or cup of the receptacle surrounding a pistil
perigynous petals
also : having perigynous stamens and petals
perigynous flowers
perigyny
pə-ˈri-jə-nē
noun 
Word History
Etymology
borrowed from New Latin perigynus, from peri- peri- + -gynus -gynous
Note: The term was apparently introduced, along with epigynus epigynous, by the French botanist Antoine Laurent de Jussieu (1748-1836) in Genera plantarum secundum ordines rationales disposita (Paris, 1789), p. xiii.
First Known Use
1807, in the meaning defined above