_MAMMILLA'RIA. MAMMILLA'RIA._ Cal. superior, coloured, 5-8-lobed. Cor. of 5-8 petals, united in a short tube. Stam-filiform. Style thread-shaped. Stigma 4-7 cleft. Berry smooth, seeds small and numerous. The flowers are produced from the _axillæ_, or base, of the _mammillæ_, or teats, and the seed vessels appearing the following year.