The calyx and corolla are fused to form a floral tube (also called a hypanthium) that is cylindrical (4-6 mm long), greenish, and 8-12 nerved.    From Wordnik.com.  [Featured Articles - Encyclopedia of Earth] Reference

I want to stop smelling the basal stipules, pinnate leaflets, hypanthium and achenes.    From Wordnik.com.  [Yolanda Reid Chassiakos: A Rose By Any Other Name] Reference

The structure now is regarded as a hollowed receptacle or stem (hypanthium), with the pistil inside, the petals and stamens on its rim.    From Wordnik.com.  [The Apple-Tree The Open Country Books—No. 1] Reference