Nototrichium humile - Hbd.
Kulu`i
Other English Common Names: Kaala Rockwort
Taxonomic Status: Accepted
Related ITIS Name(s): Nototrichium humile Hbd. (TSN 20827)
Unique Identifier: ELEMENT_GLOBAL.2.150926
Element Code: PDAMA0H010
Informal Taxonomy: Plants, Vascular - Flowering Plants - Amaranth Family
Image 118433

© J. K. Obata

 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Caryophyllales Amaranthaceae Nototrichium
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Concept Reference
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Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Nototrichium humile
Taxonomic Comments: GENUS ENDEMIC TO HAWAIIAN ISLANDS, SPECIES RESTRICTED TO OAHU & MAUI. ORIGINALLY DESCRIBED BY HILLEBRAND, SEVERAL VARIETIES RECOGNIZED BY DEGENER & SHERFF. WAGNER ET AL. ARE NOT RECOGNIZING ANY VARIETIES.
Conservation Status
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NatureServe Status

Global Status: G2
Global Status Last Reviewed: 07May1997
Global Status Last Changed: 07Aug1990
Rounded Global Status: G2 - Imperiled
Reasons: Aside from a single collection from East Maui, this species has been recorded only from the Waianae Mountains of Oahu. This species is now found almost exclusively on the leeward side of the mountain range. It is thought that fewer than 2,000 plants remain. Some populations have been partially destroyed by fire in recent years. Feral goats continue to degrade the largest populations of this species. Other threats to this species include cattle, feral pigs and alien plants.
Nation: United States
National Status: N2

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States Hawaii (S2)

Other Statuses

U.S. Endangered Species Act (USESA): LE: Listed endangered (29Oct1991)
U.S. Fish & Wildlife Service Lead Region: R1 - Pacific

NatureServe Global Conservation Status Factors

Range Extent Comments: Current range: Waianae Mountains of Oahu; also known historically from Lualailua Hills on Maui.

Number of Occurrences: 6 - 20
Number of Occurrences Comments: 13 current (between 1982 and 1997) and 11 historical occurrences.

Population Size Comments: Currently over 1,600 plants observed. It is thought that fewer than 2,000 plants remain.

Overall Threat Impact Comments: Threats include fires, feral goats, pigs, and cattle, and alien plants.

Intrinsic Vulnerability Comments: Fragility unknown.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Current range: Waianae Mountains of Oahu; also known historically from Lualailua Hills on Maui.

U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States HI

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
HI Honolulu (15003), Maui (15009)*
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
20 Maui (20020000)+*, Oahu (20060000)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: An upright to trailing shrub. The stems and young leaves are covered with short hairs, and its stalkless flowers are arranged in a spike at the ends of the stems.
Technical Description: "Shrubs; stems erect to decumbent, 1-5 m long, openly branched, sparsely pubescent with short appressed hairs. Leaves ovate to oblong, 3-9 cm long, 2-5 cm wide (juvenile leaves or leaves of young flowering plants narrower than those of mature plants), moderately pubescent with short appressed hairs, becoming glabrate with age, margins entire, apex obtuse to rounded, base cuneate to truncate, petioles 4-8 mm long. Flowers broadly ovoid, in slender spikes 3-14 cm long, ca. 4 mm or less in diameter, peduncles 0.5-1.5 cm long; sepals ovate, ca. 3 mm long, pubescent with short appressed to spreading hairs, subtended by a very broadly ovate, scarious bract ca. 1 mm long, ca. 1.5-2 mm wide, persistent on the rachis, bracteoles cordate to ovate, keeled, ca. 1 mm long, deciduous with the calyx and fruit. Fruit ca. 2 mm long, enclosed by the calyx." (Wagner et al., 1990)
Diagnostic Characteristics: Spikes slender, 3-14 cm long, 4 mm or less in diameter, pubescent with short, often appressed hairs, these not obscuring the flowers. Oahu, East Maui. (Wagner et al., 1990)
Duration: PERENNIAL
Terrestrial Habitat(s): Cliff, Forest - Hardwood, Forest/Woodland
Habitat Comments: Open, remnant dry or mesic forest, on cliff faces, in gulches, or on steep slopes.
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 07May1997
NatureServe Conservation Status Factors Author: L. Kashinsky
Element Ecology & Life History Edition Date: 30Sep1992

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Sherff, E.E. 1950. A preliminary paper on the genus Nototrichium (A. Gray) Hillebr. (fam. Amaranthaceae). Bot. Leafl. 1:2-4.

  • Sherff, E.E. 1951. A revision of the Hawaiian Island genus Nototrichium Hillebr. (fam. Amaranthaceae). Bot. Leafl. 4:2-21.

  • Wagner, W.L., D.R. Herbst, and S.H. Sohmer. 1990. Manual of the flowering plants of Hawaii. Univ. Hawaii Press and Bishop Museum Press, Honolulu. 1853 pp.

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