Dieffenbachia+amoena

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The work "dumb" is derived from the extremely unpleasant sensation this plant can give the mouth if consumed. It contains irritants. Dumb cane comes from a family Araceae of tropical plants characterized by a thick, unbranched stem and large, oblong leaves. Depending on the species, dumb cane will grow up to 6 feet tall and can have leaves as long as 18 inches. Its leaves often have narrow white or yellow stripes on either side of the midrib. There are also Spotted Dumb Cane varieties, D. maculata and D. picta, with yellow markings and a "Rudolph Roehrs" variety (D. roehrsii) with pale chartreuse and ivory coloration.