Cover of the first edition of Ethan Frome (1911). Source: ...
a tube formed by the fusion of the sepals (calyx), at least at the base.
the tubular, often cup shaped or bell shaped, fused part of the calyx when it is free from the corolla. cf. floral tube
A tube formed by fusion or cohesion of sepals. ... Compare: hypanthium. ... (09 Oct 1997) ...