Cenchrus agrimonioides 


Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Liliopsida Cyperales Gramineae

Scientific Name: Cenchrus agrimonioides
Species Authority: Trin.
Infra-specific Taxa Assessed:
Taxonomic Source(s): Wagner, W.L., Herbst, D.R. and Lorence, D.H. 2005. Flora of the Hawaiian Islands website. Available at:

Assessment Information [top]

Red List Category & Criteria: Critically Endangered C2a(i) ver 3.1
Year Published: 2003
Date Assessed: 2003-04-30
Needs updating
Assessor(s): Bruegmann, M.M. & Caraway, V.
Reviewer(s): Maunder, M. (Plant Conservation Committee) & Pollock, C.M. (Red List Programme Office)
Cenchrus agrimonioides is endemic to the island of Oahu. Formerly its range included Hawaii, Maui, Molokai and Lanai, but it is now extinct from these islands. Currently it is known from six subpopulations, totaling less than 100 individuals. Threats to the species include feral pigs and goats, fire and competition with invasive plant species.

Geographic Range [top]

Range Description: Cenchrus agrimonioides is endemic to the Hawaiian Islands. Currently it is only known to exist on Oahu.
Countries occurrence:
United States (Hawaiian Is.)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Current Population Trend: Decreasing
Additional data:

Habitat and Ecology [top]

Habitat and Ecology: A perennial tufted grass occurring in dry to moist forests on ridges and on gulch slopes, or on old lava flows.
Systems: Terrestrial

Threats [top]

Major Threat(s): The taxon is threatened by pigs, goats, deer, cattle, alien plants and fire.

Conservation Actions [top]

Conservation Actions: Army Environmental staff have completed a report entitled "U.S. Army Garrison Hawaii, Oahu Training Areas, Natural Resource Management Final Report". This includes very detailed management plans and descriptions of completed actions for each endangered plant species that occurs on Army land. The Army has also constructed a fence around two subpopulations of 18 plants and removed all pigs from within the exclosure. Weed control and quarterly phenological monitoring are in progress.

A long-range management plan for the Honouliuli Preserve prescribes actions for alien plant management, ungulate control, fire control, rare species recovery and native habitat restoration. It is expected that these actions will benefit Cenchrus agrimonioides within the Preserve.

Plants found at the Pahole Natural Area Reserve are found within a fenced exclosure.

Cenchrus agrimonioides has been successfully propagated at the Lyon Arboretum's micropropagation laboratory, at the Waimea Arboretum, at the Division of Forestry and Wildlife's Pahole Plant Nursery, and at the National Tropical Botanical Garden. Reintroduction has not been attempted.

Citation: Bruegmann, M.M. & Caraway, V. 2003. Cenchrus agrimonioides. The IUCN Red List of Threatened Species 2003: e.T44153A10864904. . Downloaded on 27 November 2015.
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