WordNet
calyx tube
n. the cuplike or ringlike or tubular structure of a flower which bears the sepals and stamens and calyx (as in Rosaceae) [syn: hypanthium, floral cup]
Usage examples of "calyx tube".
The calyx tube has fifteen ribs, a distinguishing feature of the genus Nepeta, to which this species belongs.
The calyx tube is thickly covered with soft, cartilaginous bristles.