Dieffenbachia, also known as dumb cane, is a popular tropical perennial often grown indoors for its attractive foliage. These plants are characterized by their large, ovate, and waxy leaves, typically green with white or cream variegation, and a thick, succulent stem. They are relatively low-maintenance and can tolerate various light conditions, making them a good choice for indoor spaces. 

Key characteristics of Dieffenbachia:

Foliage: Large, pointed, ovate leaves with varying patterns of green, cream, and white variegation. 

Size: Can grow up to 6-10 feet tall in ideal conditions, but typically smaller indoors. 

Stem: Thick and succulent, becoming noticeable as lower leaves drop off. 

Toxicity: Contains raphides, which can cause temporary swelling and speech impairment if ingested, hence the common name "dumb cane". 

Light: Thrives in indirect light and can tolerate lower light conditions. 

Watering: Water when the soil is almost completely dry. 

Humidity: Prefers higher humidity but can adapt to average household levels. 

Air Purification: Known for air-purifying qualities, removing toxins like formaldehyde, benzene, and trichloroethylene. 

Varieties: Many cultivars exist, including 'Camille', 'Tropic Snow', and 'Delilah', each with unique leaf variegation patterns.