calyx tube

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Noun1.calyx tube - the cuplike or ringlike or tubular structure of a flower which bears the sepals and stamens and calyx (as in Rosaceae)
plant organ - a functional and structural unit of a plant or fungus
References in periodicals archive ?
In the springboard or catapult mechanism, the fruit or persistent calyx tube (or gemmae in the case of Kalanchoe tubiflora; Brodie 1955) is attached to the stem by a resilient pedicel, which is bent downward by falling raindrops and, as it recoils upward, seeds are dispersed.