Donkey-ears (Bryophyllum gastonis-bonnieri (Hamet & Perrier) Lauzac-Marchal) is native to Madagascar. The long leaves are wavy and have regularly scattered dark mottles. Donkey-ears reproduce only at the apex (tip) of the leaves.
As soon as the plantlets have a few roots, they can be removed and placed on the surface of the soil. Bryophyllum plantlets are often shared between plant collectors resulting in such names as friendship plants and pregnant plants. Left to themselves, donkey-ears plantlets root around the parent plant forming colonies.
Bryophyllum.com is a beautiful and well-organized website about the "viviparous crassulas". To learn more about the plants and other closely related succulents, click on the link: http://www.bryophyllum.com/index.php