They are called syngonium or arrowhead plant since they produce leaves shaped like arrowheads. The leaves are produced on long stems and have many variegated color patterns and shapes. Some syngoniums are dwarf and others large, some are compact with short stems and others are vining. They are often sold as nephthytis, a genus to which they are closely related but which is rarely available. Zantedeschia is the genus of the calla lily .
Callas have showy inflorescences, the spathe being white, yellow, pink or other colors.
Leaves may be solid green or spotted. Peat is often used alone for many of these plants, but any good mix with a lot of organic matter will do. Plants in this family are easy to grow and not fussy about medium as long as it is kept moist. The medium should be kept moist. Most will be damaged by wet medium but some can tolerate or even thrive in a wet medium.