''Metrosideros macropus'', the ''lehua mamo'' or ohi'a'', is a species of

tree In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are ...

in the eucalyptus family,

Myrtaceae Myrtaceae, the myrtle family, is a family of dicotyledonous plants placed within the order Myrtales. Myrtle, pōhutukawa, bay rum tree, clove, guava, acca (feijoa), allspice, and eucalyptus are some notable members of this group. All spe ...

. It is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...

to the island of

Oahu Oahu () ( Hawaiian: ''Oʻahu'' ()), also known as "The Gathering Place", is the third-largest of the Hawaiian Islands. It is home to roughly one million people—over two-thirds of the population of the U.S. state of Hawaii. The island of O� ...

in the

Hawaiian Islands The Hawaiian Islands ( haw, Nā Mokupuni o Hawai‘i) are an archipelago of eight major islands, several atolls, and numerous smaller islets in the North Pacific Ocean, extending some from the island of Hawaii in the south to northernmost ...

. It is closely related to the widespread and highly variable ''ōhia lehua'' ( M. polymorpha), found throughout the islands. ''Lehua mamo'', however, is only found in the Koolau mountains. It is distinguished from ''M. polymorpha'' by the elongate leaf petioles (1/3-1/2 as long as the leaf blades, compared to less than 1/4 as long in ''M. polymorpha'') and the

flower A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae). The biological function of a flower is to facilitate reproduction, usually by providing a mechanism ...

s are usually yellow. The latter character is also found in some varieties of ''M. polymorpha'', which normally has red flowers, but occasionally the flowers of ''M. macropus'' are red as well.

References

macropus ''Macropus'' is a marsupial genus in the family Macropodidae. It has two extant species of large terrestrial kangaroos. The term is derived from the Ancient Greek μάκρος, ''makros'' "long" and πους, ''pous'' "foot". Thirteen known exti ...

Endemic flora of Hawaii Trees of Hawaii Flora without expected TNC conservation status {{rosid-tree-stub