1. Encephalartos woodii

The first name that goes on the list of rare plants in the world is Encephalartos woodii. Initially, it was spotted growing at the wild forests of Ngoya in Zululand, in South Africa in 1895. It was conserved and now this plant is restricted to the botanical garden only where it was transported from Zululand and planted on the soil bed of the calibrated Temperate House together with other South African plants. It is a cycad variety and has separate male and female plants. Unfortunately, no female plants were found ever since, which indicates that the propagation will be extremely limitedd The male cones are orange yellow in color.

2. Amorphophallus titanum (Titan Arum)

You can find this rare plant of the world only in Huntington. You will find this plant growing in the botanical garden of the area, known as Rose Hills Foundation Conservatory for Botanical Science. The only time botanists can study or research more about this plant is when it blooms on rare occations. The characteristic bloom features a half open giant flower with a red, thick central wick. The internal part of the flower is red with greenish yellow outer surface.

3. Rafflesia arnoldii

Apart from being the world’s rarest plant, it is also one of the largest flowers in the world.  The Rafflesia arnoldii does not have a beautiful aromatic fragrance; instead, its odor is very similar to decaying flesh. Which is why, it also goes by the name- Corpse flower. You can find this flower in the dense rain-forests of Sumatra, Indonesia, Malaysia and Bengkulu. The characteristics of this parasite plant are that it lives on Tetrastigms vine, has large leaves, stems and roots. Insects are attracted to the odor of the flower, which also helps in pollination

4. Erysimum menziesii

If you happen to be in the sandy beach areas of California, Humboldt, Mendocino and Monterey, then you may get a chance to see this rare wall flower. The Erysimum menziesii do not grow more than 15 centimeters. The plant consist of long and straight leaves with thick, hairy and lobed stems. This rare plant has thick cluster of yellow flowers with round petals grow on tops of each of the stems. The flowers shed to give way to the long, sticky fruits.

5. Manzanita

Manzanita is a common name for many varieties of evergreen shrubs or small trees that fall under the genus of Arctostaphylos. You can find this rare plant in North America, mainly in the areas of British Columbia, Washington and California, Mexico, etc. The twisted  branches and barks of these vegetation are smooth. Another beautiful feature of this plant is that the barcks or branches are either orange or red in color. From ground hugging ones to six meter tall trees, these shrubs come in different heights. Some of these varieties are used for culinary while others form parts of landscape gardening.