Dieffenbachia is a genus of tropical flowering plants that are popular as houseplants due to their attractive foliage. Here are some of the most common types of Dieffenbachia houseplants:

1. Dieffenbachia Camille Dieffenbachia Camille is a popular variety known for its large, oval-shaped leaves with green and yellow variegation. The leaves can grow up to 12 inches long and provide a striking contrast to the plant's bright green stems.

2. Dieffenbachia Tropic Snow Dieffenbachia Tropic Snow is another popular variety known for its large, variegated leaves with green and white coloring. The leaves are typically wider than those of other Dieffenbachia varieties and can grow up to 14 inches long.

3. Dieffenbachia Compacta Dieffenbachia Compacta is a smaller variety of Dieffenbachia that typically grows to a height of 2-3 feet. It has smaller, more compact leaves with green and cream variegation.

4. Dieffenbachia Maculata Dieffenbachia Maculata, also known as Leopard Lily or Spotted Dumb Cane, is a variety with large, green leaves that are spotted with white or cream-colored markings. The leaves can grow up to 12 inches long and provide a striking contrast to the plant's upright stems.

5. Dieffenbachia Seguine Dieffenbachia Seguine, also known as Giant Dumb Cane, is a larger variety that can grow up to 10 feet tall in ideal conditions. It has large, ovate-shaped leaves with green and yellow variegation.

6. Dieffenbachia Exotica Dieffenbachia Exotica is a popular variety known for its large, broad leaves with green and yellow variegation. The leaves are typically wider than those of other Dieffenbachia varieties and can grow up to 12 inches long.

In summary, there are several types of Dieffenbachia houseplants, each with unique foliage and growth habits. Whether you're looking for a smaller variety or a large statement plant, there's a Dieffenbachia variety to suit your needs.