Hammeria salteri, also known as the "living rock" cactus, is a low-growing ground cover, native to South Africa. The plant is considered quite rare and is found only in collections of private growers. The round, daisy-like flowers are a deep magenta with a lighter colored center. The plant is propagated from seeds and root cuttings.
Pachycormus discolor var. veatchianus, also known as the Elephant tree, is very rare and is only found in the California Baja region of North America. The tree-like plant exhibits a bright red flower.
Pitahaya cactus (Hylocereus undatus,) also known as "Dragon Fruit," is an usual vining forest cactus that grows in tropical areas of the world. The plant exhibits large 8-inch trumpet-shaped flowers that only bloom at night. The flowers are white or a creamy yellow. The fruit is similar in texture and flavor to a kiwi fruit. The flesh of the fruit is white or pink and full of tiny, edible seeds.
Native to Bolivia and Argentina, Blossfeldia liliputana is the smallest known cactus. The tiny plant presents multiple stems that are less than 3/4 inch in diameter. This low-growing cactus is spineless and covered in a fine tufts of wool. The plant exhibits small yellow flowers and has a tuberous root.
Native to Africa, Adansonia digitata, known as the baobab tree, has one of the thickest trunks of any tree worldwide. The succulent tree grows to more than 60 feet tall and presents a trunk up to 30 feet in diameter. Several varieties of the baobab tree are very rare. Adansonia perrieri is the rarest baobab tree with only a few in existence. Baobab trees store water in huge, swollen trunks. The plant presents large flowers and edible fruit.