Which plant is informally known as "Dumb Cane"?

The plant commonly referred to as "Dumb Cane" is Dieffenbachia. This name stems from the plant's toxic sap which can cause temporary speechlessness or difficulty in swallowing if ingested, particularly in humans. Dieffenbachia contains calcium oxalate crystals, which can lead to swelling and irritation in the mouth and throat, thus the informal name that alludes to the potential loss of speech or dexterity in speaking.

Understanding this plant's characteristics is important for those involved in floral design and arrangement, as it highlights the need for safety considerations when handling and displaying live plants. In contrast, the other plant options listed do not carry the same level of risk associated with their sap or foliage, thereby making Dieffenbachia distinctive in this regard.