Dragon tree is a palmlike member of the agave family, related to Spanish bayonet (Yucca aloifolia), and century plant (Agave americana). The overall shape is that of an umbrella with a thick, swollen trunk and many stout, upright branches each terminating with a rosette of stiff, sword shaped leaves about 2 ft (60 cm) long.

Mature plants produce terminal clusters of greenish flowers, followed by round reddish orange fruits. In cultivation dragon tree barely gets 20-30 ft (6-9 m) tall, but in its native habitat 50 ft (15 m) tall specimens are not uncommon.

Dracaena draco is native to the Canary Islands, an archipelago of seven volcanic islands in the Atlantic Ocean about 160 miles (100 km) off the northwest coast of Africa. In its native habitat, dragon tree is an endangered species (listed as "Vulnerable") due to over collecting for its red colored resin, called "dragon's blood".

Dragon tree is grown as an ornamental throughout the world in Mediterranean climates, and is very popular in southern California.

Source