Gerald D. Carr

Dubautia kalalauensis is a rare species of flowering plant in the family Asteraceae. It is endemic to Hawaii where it is known only from the island of Kauai. There is only a single known population composed of 26 plants. It was federally listed as an endangered species of the United States in 2010. Like other Dubautia this plant is known as na`ena`e. This member of the silversword alliance was part of Dubautia laxa until 2005, when it was separated and described as a new species. The population grows in wet mountain forest habitat in the understory of ʻōhiʻa lehua (Metrosideros polymorpha)

Dubautia pauciflorula is a rare species of flowering plant in the family Asteraceae known by the common name Wahiawa Bog dubautia. It is endemic to Hawaii where it is known only from the Wahiawa Mountains on the island of Kauai. Fewer than 50 individuals are remaining. It was federally listed as an endangered species of the United States in 1991. Like other Dubautia this plant is called na`ena`e. This member of the silversword alliance was first collected in 1909, and again in 1911, but it went without a name for many decades. It was not collected again until 1979, and it was finally

Dubautia kenwoodii, the Kalalau rim dubautia, is an "extremely rare" species of flowering plant in the family Asteraceae. It is endemic to Hawaii where it is known only from the island of Kauai. Only one plant has ever been seen: the type specimen. A part of this plant was collected in 1991 and the individual was described as a new species in 1998. It was federally listed as an endangered species of the United States in 2010. Like other Dubautia this plant is known as naʻenaʻe. This member of the silversword alliance was discovered growing on a cliff along the Kalalau Rim adjacent to the

Dubautia imbricata is a rare species of flowering plant in the family Asteraceae known by the common names bog dubautia and imbricate dubautia. It is endemic to Hawaii where it is known only from the island of Kauai. There are four known occurrences. Like other Dubautia this plant is known as na`ena`e. This member of the silversword alliance was first described to science in 1981 after it was discovered in a Kauaian rainforest. It grows in just a few spots in boggy forest habitat in the understory of ʻōhiʻa lehua (Metrosideros polymorpha) trees among sedges in the genera Oreobolus and

Dubautia herbstobatae, the Na'ena'e or Keaau Valley dubautia, is an endangered species of shrub which is endemic to Oahu, Hawaii.

Calycadenia micrantha is an uncommon species of flowering plant in the family Asteraceae known by the common name small-flowered calycadenia. It is endemic to California, where it is known from about 13 occurrences that are widely spread over several counties, including Napa, Siskiyou, Shasta, Mendocino, Trinity, and Monterey Counties, with several populations known in Lake County. It was described to science as a species in 2004. Some specimens of the plant had previously been included within the description of its relative, Calycadenia truncata. The fact that it has been found in relatively

Calycadenia hooveri is a California species of flowering plant in the family Asteraceae known by the common name Hoover's western rosinweed. It is endemic to a short portion of the western Sierra Nevada foothills, where it grows in rocky areas in the hills along from Amador County to Madera County.

Dubautia syndetica, the Wahiawa dubautia, is a plant species endemic to the island of Kauai in the state of Hawaii. It is found only in the upper portions of the Wahiawa drainage basin at elevations of 680–950 m. Dubautia syndetica is a branching shrub up to 3 m tall. Leaves opposite, up to 16 cm long, elliptic to lanceolate, dark green above, lighter below, tapering to a point at the tip. Flowering heads number 10–90, with reddish-purple phyllaries. Each head has 8–17 pale yellow flowers.

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