Lobelia monostachya is a species of flowering plant

Flowering plant

The flowering plants , also known as Angiospermae or Magnoliophyta, are the most diverse group of land plants. Angiosperms are seed-producing plants like the gymnosperms and can be distinguished from the gymnosperms by a series of synapomorphies...

 in the Campanulaceae

Campanulaceae

The family Campanulaceae , of the order Asterales, contains about 2000 species in 70 genera of herbaceous plants, shrubs, and rarely small trees, often with milky non-toxic sap...

 family that is endemic to the island of Oahu

Oahu

Oahu or Oahu , known as "The Gathering Place", is the third largest of the Hawaiian Islands and most populous of the islands in the U.S. state of Hawaii. The state capital Honolulu is located on the southeast coast...

 in Hawaii

Hawaii

Hawaii is the newest of the 50 U.S. states , and is the only U.S. state made up entirely of islands. It is the northernmost island group in Polynesia, occupying most of an archipelago in the central Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of...

. It inhabits cliffside mesic shrublands in the southern Koolau Mountains at an elevation of 44–614 m (144.4–2,014.4 ft). It was previously believed to be extinct. In 1994 it was rediscovered and only 8 individuals are currently known to exist. Associated native plants include Artemisia australis, Carex meyenii, Eragrostis spp., and Psilotum nudum

Psilotum nudum

Psilotum nudum is a fern plant. Like the other species in the order Psilotales, it lacks roots. It is found in tropical Africa, Central America, tropical and subtropical North America, South America,, tropical Asia, Australia, Hawaii, southern Japan, Lord Howe Island, New Zealand, with a few...

. It is threatened by habitat loss.

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