Kalanchoe daigremontiana

Kalanchoe daigremontiana, formerly known as Bryophyllum daigremontianum and commonly called mother of thousands, or Mexican hat plant, is a succulent plant native to Madagascar. Like other members of Bryophyllum (now included in the genus Kalanchoe), it can propagate vegetatively from plantlets that develop on its leaf margins, as well as through upshoots from lateral roots, and seeds. All parts of this species contain a very toxic steroid known as daigremontianin.

It is often confused with K. laetivirens, K. delagoensis and K. × houghtonii. The leaves of K. laetivirens are completely green, while K. daigremontiana has bands or spots on the back of leaves. The leaves of K. delagoensis are linear, while K. daigremontiana has lanceolate, oblong, ovate or triangular leaves. K. × houghtonii is a hybrid between K. daigremontiana and K. delagoensis, therefore has characteristics in between; its leaves are narrower than those of K. daigremontiana, and its leaf base is attenuate, cuneate to weakly cordate or auriculate, while K. daigremontiana has strongly cordate to auriculate or even peltate leaves.