Bonamia menziesii - Gray
Hawai`i Lady's-nightcap
Other Common Names: Hawai`i lady's nightcap
Taxonomic Status: Accepted
Related ITIS Name(s): Bonamia menziesii Gray (TSN 30828)
Unique Identifier: ELEMENT_GLOBAL.2.145685
Element Code: PDCON03020
Informal Taxonomy: Plants, Vascular - Flowering Plants - Morning-Glory Family
Image 117563

© J. K. Obata

 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Solanales Convolvulaceae Bonamia
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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: Bonamia menziesii
Taxonomic Comments: GENUS PANTROPICAL, SPECIES ENDEMIC TO HAWAIIAN ISLANDS. WHILE DEGENER THOUGHT THIS SPECIES REPRESENTED AN ENDEMIC GENUS, ALL EVIDENCE INDICATES THAT IT IS A SOMEWHAT UNUSUAL FORM OF BONAMIA (MYINT & WARD, 1968)
Conservation Status
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NatureServe Status

Global Status: G1
Global Status Last Reviewed: 14Oct1996
Global Status Last Changed: 23Nov1996
Rounded Global Status: G1 - Critically Imperiled
Reasons: Endemic to the six largest islands of Hawaii. Although still occurring on most of the larger islands in Hawaii, the total number of plants probably does not exceed several hundred individuals. The dry habitats where this species occurs have been destroyed or altered by agriculture, development, alien plants and animals, and fire.
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 (10Nov1994)
U.S. Fish & Wildlife Service Lead Region: R1 - Pacific

NatureServe Global Conservation Status Factors

Range Extent Comments: Current range includes Oahu, Lanai, Maui, Kauai, and Hawaii. Also known historically from Molokai.

Number of Occurrences: 21 - 80
Number of Occurrences Comments: Twenty-five current (between 1982 and 1997), sixteen historical occurrences and two with status unknown.

Population Size Comments: Currently about 40+ plants observed. Total estimate probably fewer than 1000 plants.

Overall Threat Impact Comments: Threats from fires, non-native weed invasion, feral pigs and goats, Black-Tailed Deer, and cattle.

Intrinsic Vulnerability Comments: Fragility unknown.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Current range includes Oahu, Lanai, Maui, Kauai, and Hawaii. Also known historically from Molokai.

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 Hawaii (15001), Honolulu (15003), Kalawao (15005)*, Kauai (15007), Maui (15009)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
20 Hawaii (20010000)+, Maui (20020000)+, Lanai (20040000)+, Molokai (20050000)+*, Oahu (20060000)+, Kauai (20070000)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A twining liana covered with yellowish brown hairs. Flowers are white to greenish white.
Technical Description: "Lianas; stems twining, especially the lateral branches, up to 10(-15) m long, yellowish brown tomentose when young, becoming glabrate. Leaves soft coriaceous, oblong-elliptic, ovate to rarely orbicular, 3-9 cm long, 1-4 cm wide, upper surface glabrous or with short tomentulose hairs, lower surface densely yellowish brown tomentose, rarely glabrous, apex truncate, emarginate, obtuse, or acute, base usually rounded, petioles 8-25 mm long. Flowers solitary or sometimes in cymes, pedicels 1-2 cm long, with 2 scale-like bracts at base; sepals soft coriaceous, ovate, 7-10 mm long, the outer 2 slightly longer than inner ones, yellowish brown tomentose, apex usually acute; corolla white to greenish white, funnelform, 20-25 mm long, 15-20 mm wide, hirsute with brown hairs in 5 bands. Capsules tan to yellowish brown, tardily dehiscent or indehiscent, usually pendent, chartaceous, ovoid-conical, 10-15 mm long, 7-10 mm wide, glabrous. Seeds 1 or occasionally 2, dark brown to black, surrounded by black pulp, ovoid, 6-8 mm long, 4-5 mm wide, glabrous. [2n = 30*]" (Wagner et al., 1990)
Diagnostic Characteristics: The only species of this genus in the Hawaiian Islands.
Duration: PERENNIAL
Terrestrial Habitat(s): Forest - Hardwood, Forest/Woodland
Habitat Comments: Dry to mesic forest, rarely in wet forest.
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: 04Jun1997
NatureServe Conservation Status Factors Author: KMS
Element Ecology & Life History Edition Date: 25Jun1992

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
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  • Austin, D.F. 1990. Convolvulaceae. Pp. 548-564 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.

  • Hillebrand, W.F. 1888. Flora of the Hawaiian Islands: a description of their phanerogams and vascular cryptogams. Facsimile ed., 1981. Lubrecht & Cramer, Monticello, NY. 673 pp.

  • 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.

  • Myint, T., and D.B. Ward. 1968. A taxonomic revision of the genus Bonamia (Convolvulaceae). Phytologia 17(3): 121-239.

  • 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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