Gouania meyenii - Steud.
Meyen's Gouania
Taxonomic Status: Accepted
Related ITIS Name(s): Gouania meyenii Steud. (TSN 28546)
Unique Identifier: ELEMENT_GLOBAL.2.128581
Element Code: PDRHA070A0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Buckthorn Family
Image 117031

© G. D. Carr

 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Rhamnales Rhamnaceae Gouania
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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: Gouania meyenii
Conservation Status
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NatureServe Status

Global Status: G1
Global Status Last Reviewed: 07Aug1990
Global Status Last Changed: 07Aug1990
Rounded Global Status: G1 - Critically Imperiled
Reasons: This species was thought to have been endemic to the island of Oahu until it was discovered in a couple of locations on Kauai in the 1990's. On Oahu, it is currently restricted to two adjacent valleys in the northern Waianae Mountains. The total species population appears not to exceed 200 plants. The species and its habitat is being degraded by feral goats and pigs. Its habitat is being invaded by a number of alien weed species.
Nation: United States
National Status: N1

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 (S1)

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: Northern Waianae Mountains, Oahu and Kalalau Valley, Kauai.

Number of Occurrences: 6 - 20
Number of Occurrences Comments: Seven current (between 1982 and 1997) and two historical records.

Population Size Comments: Between 100 and 150 plants currently known. Estimate less than 200 plants total.

Overall Threat Impact Comments: This species is threatened by alien plant species, fire, rockslides or landslides, and habitat degredation by feral pigs and goats.

Intrinsic Vulnerability Comments: Unknown.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Northern Waianae Mountains, Oahu and Kalalau Valley, Kauai.

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)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: An erect to spreading shrub with stems 0.5-2.2 m long. Flowers are small and white.
Technical Description: "Erect to spreading shrubs, young growth yellowish brown pilose, soon glabrate; stems 0.5-2.2 m long. Leaves chartaceous, ovate to broadly elliptic or occasionally suborbicular, blades 3-7.5 cm long, 1.6-4.5 cm wide, upper surface glabrous, lower surface sparsely appressed pilose, more densely so along veins, or only along veins, margins entire, apex short-acuminate to obtuse, with a minute mucro or occasionally emarginate, base rounded to broadly cuneate, petioles 0.8-5(-7) cm long, stipules linear-lanceolate, 1-4 mm long, densely yellowish brown pilose, somewhat persistent. Flowers possibly unisexual (and the plants apparently monoecious), in axillary cymes 20-80 mm long, without tendrils, yellowish brown pilose throughout, glabrate with age, peduncles 30-60 mm long, pedicels 1-12 mm long, bracts linear-lanceolate to narrowly deltate, ca. 1-1.5 mm long; sepals white, 1.5-3 mm long; petals white, 1.2-1.8 mm long, each one enclosing a stamen; ovary apparently sometimes abortive; style 3-lobed. Fruit 9-16 mm long, glabrate to sparsely puberulent, 2-winged or occasionally 3-winged, the wings extending throughout the fruit, but somewhat wider toward apex, ca. (3-)4-5 mm wide, apex and base notched. Seeds brown, glossy, ellipsoid, 5-7 mm long." (Wagner et al., 1990)
Diagnostic Characteristics: Leaf margins entire; flowering branches without a tendril; fruit glabrate to sparsely puberulent, 2-winged or occasionally 3-winged, the wings ca. (3-)4-5 mm wide; peduncles 30-60 mm long. Waianae Mts, Oahu. (Wagner et al., 1990)
Duration: PERENNIAL
Terrestrial Habitat(s): Cliff, Forest - Hardwood, Forest/Woodland, Shrubland/chaparral, Woodland - Hardwood
Habitat Comments: Moist shrublands and forests. Rocky ridges, cliffs and gulch 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: 27Jan1987
NatureServe Conservation Status Factors Author: KMS
Element Ecology & Life History Edition Date: 14Jul1992

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.

  • St. John, H. 1969. Monograph of the Hawaiian species of Gouanaia (Rhamnaceae). Hawaiian plant studies 34. Pacific Sci. 23: 507-543.

  • St. John, H. 1973. A new living speices of Gouania (Rhamnaceae) on Oahu, Hawaiian Islands. Hawaiian plant studies 40. Pacific Sci. 27: 269-273.

  • 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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