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American globeflower is an

endangered plant of eastern parts of North America. A press release datedSeptember 20, 2010, published on the IUCN website states that over one-fifth of

the world's plant species are threatened with extinction. Natural causes such as

forest fires, competition from non-native species, and pests are among the causes

of the threat. According to Professor Stephen Hopper, though, loss of habitat dueto human activities is the main threat to over 20 percent of the plant species on

Earth. Does this Spark an idea? Other People Are Reading

Endangered Plants of Assam Australian Endangered Plants List

Rafflesiao There are 16 known species of Rafflesia that grow in the rainforests of

Southeast Asia, and all of them are threatened or endangered. Rafflesia is

a parasitic plant that does not have leaves, stem, roots, or chlorophyll. It

grows on the root of a vine called Tetrastigma, from which it sucksnutrients with the help of thread-like structures that it sends into the body

of its host. The plant is visible only during its reproductive phase when theflowers--which grow almost a meter wide in diameter--sit directly on theforest floor. Over-collection of buds of this plant, which is used as

medicine, has contributed considerably to its endangered status. Also, the

fact that this plant can grow only in very specific regions of the world is a

big challenge for its conservation. 2. 2.

2.Wollemi Pine

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o Wollemi pine or Wollemia nobilis was recently discovered in 1994 in a

narrow canyon in the Wollemi National Park in Australia. The tree rises to

about 40 meters in height, with a trunk that can grow as big as a meter indiameter. It belongs to the family Araucariaceae, and today less than 100

of these plants are left on the planet. The Wollemi pine has upright

branches that grow from buds on the trunk. Leaves are borne on branchesthat grow sideways, from the upright branches. The younger leaves are

bright lime-green in color whereas the older ones are deep bluish in color.

Leaves are broad, unlike the pines of the northern hemisphere.

3.AmericanGlobeflowero American globeflower is a perennial that grows 12 to 20 inches in height

and bears pale yellow flowers that bloom between April and June. Theleaves are lobed and 3 to 5 inches wide. Once the plant bears flowers, the

leaves increase in size. This plant is found in 40 different populations

spread across eastern North America. None of the populations containsmore than 100 of these plants. Besides threat from human activities,

competition from invasive species, slugs eating up flowers, and changes in

watersheds by beavers are some other factors that threaten the survival ofthis plant.

4.Dwarf Bearclaw-Poppyo Dwarf bearclaw-poppy or Arctomecon humilis is endemic to Washington

County, Utah. It is a perennial herb that belongs to the poppy family. It

produces white flowers that bloom during mid April to May. The area in

which this plant thrives is undergoing rapid human population growth.Development to support this expansion and off-road vehicle use are

shrinking the plant's habitat further.