HYPANTHIUM
hypanthium, floral cup, calyx tube
(noun) the cuplike or ringlike or tubular structure of a flower which bears the sepals and stamens and calyx (as in Rosaceae)
Source: WordNet® 3.1
Etymology
Noun
hypanthium (plural hypanthia)
(botany) The bowl-shaped part of a flower on which the sepals, petals, and stamens are borne
Source: Wiktionary
Hy*pan"thi*um, n.; pl. L. Hypanthia, E. Hypanthiums. Etym: [NL., fr.
Gr. (Bot.)
Definition: A fruit consisting in large part of a receptacle, enlarged
below the calyx, as in the alycanthus, the rose hip, and the pear.
Source: Webster’s Unabridged Dictionary 1913 Edition