Schiedea attenuata

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Schiedea attenuata
Status iucn3.1 CR.svg
Critically endangered, possibly extinct in the wild  (IUCN 3.1) [1]
Status TNC G1.svg
Critically Imperiled  (NatureServe) [2]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Caryophyllaceae
Genus: Schiedea
Species:
S. attenuata
Binomial name
Schiedea attenuata
W.L.Wagner, S.G.Weller & A.K.Sakai

Schiedea attenuata is a rare species of flowering plant in the family Caryophyllaceae known by the common name Kalalau schiedea. It is endemic to Hawaii, where it is known only from the Kalalau Valley on the island of Kauai. [2] It is threatened by the degradation of its habitat. It was federally listed as an endangered species of the United States in 2010. [3]

This plant is a shrub growing up to about 75 centimeters tall. It is covered in tiny, curved, purplish hairs. The oppositely arranged leaves have thick, somewhat fleshy blades which are linear to lance-shaped and measure up to 7 centimeters long by less than a centimeter wide. The inflorescence is an open cyme of up to 55 flowers. The flower has small lance-shaped green sepals and no petals. [4]

This shrub grows on very steep basalt cliffs on the slopes of the Kalalau Valley of Kauai. Other plants in the habitat include Gouania meyenii , Peucedanum sandwicense , Poa mannii , Hedyotis sp., Lysimachia glutinosa , Melicope pallida , Dubautia sp., Dryopteris unidentata , Metrosideros polymorpha , Coprosma sp., Vaccinium sp., Lipochaeta sp., Wilkesia sp., Lobelia niihauensis , Lepidium serra , Nestegis sandwicensis , and Hibiscus kokio . When the plant was first described in 1994 there were only 20 individuals counted. [4] By 2007 there had been no more plants discovered. [2]

One major threat to the species is the feral goat population. It is also threatened by the invasion of non-native plants into its habitat. Because there are only a few plants of this species, it could face extinction in any one major event, such as a hurricane. [2]

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The Kalalau Valley is located on the northwest side of the island of Kauaʻi in the state of Hawaiʻi. The valley is located in the Nā Pali Coast State Park and houses the Kalalau Beach. The Nā Pali Coast is rugged and is inaccessible to automobiles. The only legal ways to access the valley are by kayak or by hiking the Kalalau Trail.

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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 na`ena`e.

Exocarpos luteolus is a rare species of flowering plant in the sandalwood family known by the common names leafy ballart or heau. It is endemic to Hawaii, where it is known only from the island of Kauai. There are eight populations remaining, for a total global population of only 39 individuals. The plant was federally listed as an endangered species of the United States in 1994.

Isodendrion longifolium is a rare species of flowering plant in the violet family known by the common names longleaf isodendrion and aupaka. It is endemic to Hawaii, where it is known from fewer than 1000 individuals on the islands of Kauai and Oahu. It is a federally listed threatened species of the United States.

<i>Lysimachia iniki</i> Species of flowering plant

Lysimachia iniki is a rare species of flowering plant in the family Primulaceae known by the common names Wailua River yellow loosestrife and Wailua River island-loosestrife. It is endemic to Hawaii, where there is only one known occurrence existing on the island of Kauai. The plant was federally listed as an endangered species of the United States in 2010.

Lysimachia pendens is a rare species of flowering plant in the family Primulaceae known by the common name broad-leaf yellow loosestrife. It is endemic to Hawaii, where there is a single occurrence known on the island of Kauai. It was federally listed as an endangered species of the United States in 2010.

Lysimachia scopulensis is a rare species of flowering plant in the family Primulaceae known by the common name shiny-leaf yellow loosestrife. It is endemic to Hawaii, where there are two small populations on the island of Kauai. It was federally listed as an endangered species of the United States in 2010.

<i>Cyperus pennatiformis</i> Species of plant

Cyperus pennatiformis is a rare species of sedge known by the common name coastal flatsedge. It is endemic to Hawaii, where it grows on the islands of Maui, Kauai, and Laysan. It is a federally listed endangered species of the United States.

Schiedea apokremnos is a rare species of flowering plant in the family Caryophyllaceae known by the common names Kauai schiedea, Na Pali Coast schiedea, and ma`oli`oli. It is endemic to Hawaii, where it is known only from the island of Kauai. It is threatened by the degradation of its habitat. It is a federally listed endangered species of the United States.

<i>Schiedea haleakalensis</i> Species of flowering plant

Schiedea haleakalensis is a rare species of flowering plant in the family Caryophyllaceae known by the common name Haleakalā schiedea. It is endemic to Hawaii, where it is known only from Haleakalā National Park on the island of Maui. It is threatened by the degradation of its habitat. It was federally listed as an endangered species of the United States in 1992. Its native habitat includes dry subalpine cliffs with native shrubs.

Schiedea helleri is a rare species of flowering plant in the family Caryophyllaceae known by the common names Heller's schiedea and Kaholuamanu schiedea. It is endemic to Hawaii, where it is known only from the island of Kauai. It is threatened by the degradation of its habitat. It was federally listed as an endangered species of the United States in 1996.

<i>Schiedea hookeri</i> Species of flowering plant

Schiedea hookeri is a rare species of flowering plant in the family Caryophyllaceae known by the common names Hooker's schiedea and sprawling schiedea. It is endemic to Hawaii, where it is known only from the island of Oahu. It is thought to have been extirpated from Haleakalā on Maui. It is threatened by the degradation and destruction of its habitat. It was federally listed as an endangered species of the United States in 1996.

Schiedea kauaiensis is a rare species of flowering plant in the family Caryophyllaceae known by the common name Kauai schiedea. It is endemic to Hawaii, where it is known only from the island of Kauai. It is threatened by the degradation and destruction of its habitat. It was federally listed as an endangered species of the United States in 1996.

Schiedea kealiae is a rare species of flowering plant in the family Caryophyllaceae known by the common name Waianae Range schiedea. It is endemic to Hawaii, where it is known only from the Waianae Range on the island of Oahu. It is threatened by the degradation and destruction of its habitat. It was federally listed as an endangered species of the United States in 1996.

Schiedea membranacea is a rare species of flowering plant in the family Caryophyllaceae known by the common name valley schiedea. It is endemic to Hawaii, where it is known only from the island of Oahu. It has been extirpated from Maui and Molokai. Plants in a population known from Kauai are actually members of other species. Thus, the species is now endemic to Oahu. It is threatened by the degradation and destruction of its habitat. It is a federally listed endangered species of the United States.

Schiedea sarmentosa is a rare species of flowering plant in the family Caryophyllaceae known by the common name cliff schiedea. It is endemic to Hawaii, where it is known only from the island of Molokai. It is threatened by the degradation and destruction of its habitat. It is a federally listed endangered species of the United States.

Schiedea spergulina is a rare species of flowering plant in the family Caryophyllaceae known by the common name canyon schiedea and spreading schiedea. It is endemic to Hawaii, where it is known only from the island of Kauai. It is threatened by the degradation and destruction of its habitat. There are two varieties of this plant, one federally listed as an endangered species of the United States, and the other listed threatened.

Schiedea stellarioides is a rare species of flowering plant in the family Caryophyllaceae known by the common name lau lihilihi. It is endemic to Hawaii, where it is known only from the island of Kauai. It is threatened by the degradation and destruction of its habitat. The plant is federally listed as an endangered species of the United States.

Stenogyne campanulata is a rare species of flowering plant in the mint family known by the common name Kalalau Valley stenogyne. It is endemic to Hawaii, where it is known only from the Kalalau Valley on the island of Kauai. It is a federally listed endangered species of the United States.

References

  1. ↑ Clark, M. (2017) [errata version of 2016 assessment]. "Schiedea attenuata". IUCN Red List of Threatened Species . 2016: e.T80230525A115511371. doi: 10.2305/IUCN.UK.2016-1.RLTS.T80230525A80230535.en . Retrieved 11 April 2024.
  2. 1 2 3 4 "Shiedea attenuata". NatureServe explorer. The Nature Conservancy.
  3. ↑ USFWS. Determination of Endangered Status for 48 Species on Kauai and Designation of Critical Habitat; Final Rule. Federal Register April 13, 2010.
  4. 1 2 Wagner, W. L., et al. (1994). Description of a rare new cliff-dwelling species from Kauai, Schiedea attenuata (Caryophyllaceae). Novon 4 187-90.
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