Lobelia niihauensis - St. John
Niihau Lobelia
Taxonomic Status: Accepted
Related ITIS Name(s): Lobelia niihauensis St. John (TSN 196205)
Unique Identifier: ELEMENT_GLOBAL.2.134393
Element Code: PDCAM0E0Y0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Other flowering plants
Image 118400

© J. K. Obata

 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Campanulales Campanulaceae Lobelia
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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: Lobelia niihauensis
Taxonomic Comments: GENUS FOUND THROUGHOUT TROPICAL & TEMPERATE REGIONS WORLD- WIDE. FIRST DESCRIBED BY ST.JOHN IN 1931. LAMMERS IN WAGNER ET AL DOES NOT RECOGNIZE ANY VARIETIES.
Conservation Status
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NatureServe Status

Global Status: G2
Global Status Last Reviewed: 13May1997
Global Status Last Changed: 07Aug1990
Rounded Global Status: G2 - Imperiled
Reasons: Endemic to Niihau, Kauai, and the Waianae Mountains of Oahu. This species may number 5,000 or more plants. Much of this species' habitat is being degraded by feral goats and pigs, and is being invaded by a number of alien plant species. Additional threats include rats and fire.
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: Oahu and Kauai; historical range included Niihau.

Number of Occurrences: 21 - 80
Number of Occurrences Comments: Thirty-three current (between 1982 and 1997) and seven historical occurrences.

Population Size Comments: At least 2000 individuals. May number more than 5000 plants.

Overall Threat Impact Comments: Feral pigs and goats have degraded much of this species' habitat. Invasive alien plants, rats, and fires also threaten the species.

Short-term Trend Comments: The restriction of most populations of Lobelia niihauensis on both islands to virtually inaccessible cliffs suggests that goat predation may have eliminated this species from more accessible locations and thus may have played a role in limiting the distribution of this species.

Intrinsic Vulnerability Comments: Fragility unknown.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Oahu and Kauai; historical range included Niihau.

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), Kauai (15007)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
20 Oahu (20060000)+, Kauai (20070000)+, Niihau (20080000)+*
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A sprawling shrub branching near the base. Each branch bears a terminal rosette of leaves. The magenta flowers are borne on unbranched terminal inflorescences.
Technical Description: "Stems woody, prostrate, 2-4 dm long, branched at or below the middle, each branch with an apical rosette of leaves. Leaves narrowly elliptic or oblanceolate, 7-15 cm long, 0.7-1.8 cm wide, glabrous or pubescent, margins entire to callose-serrulate, flat to undulate or revolute, apex acute to acuminate, sessile or subsessile. Inflorescences unbranched, 12-15 cm long, glabrous or pubescent, pedicels 8-25 cm mm long, bracts filiform, linear, or subulate, 2-10 mm long; hypanthium obconical to hemispherical, 2-5 mm long, glabrous or pubescent; calyx lobes linear to triangular, 1-5 mm long, glabrous or pubescent; corolla magenta, 22-36 mm long, 3-5 mm wide, glabrous or pubescent, the lobes spirally revolute; staminal column glabrous or sparsely pubescent; anthers glabrous, the lower 2 with apical tufts of white hairs. Capsules ovoid, 6-8 mm long, glabrous or pubescent. Seeds brownish, 0.5 mm long." (Lammers in Wagner et al., 1990)
Diagnostic Characteristics: Stems prostrate, contorted, branched at or below the middle, 2-4 dm long; corolla magenta, 22-36 mm long; leaves narrowly elliptic or oblanceolate, 0.7-1.8 cm wide. Niihau, Kauai, Oahu. (Lammers in Wagner et al., 1990)
Terrestrial Habitat(s): Cliff
Habitat Comments: Exposed mesic to dry vertical rock cliffs.
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: 13May1997
NatureServe Conservation Status Factors Author: L. Kashinsky
Element Ecology & Life History Edition Date: 01Oct1992

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.

  • Lammers, T.G. 1990. Campanulaceae, pp. 420-489. In: Wagner, W.L., D.R. Herbst, and S.H. Sohmer, Manual of the flowering plants of Hawai`i. Special Publ. Bishop Mus., Honolulu 83: 1-1853.

  • Rock, J.F. 1919. A monographic study of the Hawaiian species of the tribe Lobelioideae, family Campanulaceae. Mem. Bernice P. Bishop Mus. 7(2): 1-395.

  • St. John, H. 1939. New Hawaiian Lobeliaceae. Hawaiian plant studies 7. Occas. Pap. Bernice P. Bishop Mus. 15(2):21-35.

  • 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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