CPC Plant Profile: Hawai`i Lady's-nightcap
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Plant Profile

Hawai`i Lady's-nightcap (Bonamia menziesii)

A closeup shows the flower of this rare bindweed. Photo Credit: Waimea
  • Global Rank: G1 - Critically Imperiled
  • Legal Status: Federally Endangered
  • Family: Convolvulaceae
  • State: HI
  • Nature Serve ID: 145685
  • Date Inducted in National Collection: 02/10/1987

Bonamia menziesii is a member of the morning-glory family (Convolvulaceae). It is a vine or twining liana with branches that can measure up to 10 meters long. The leaves are usually leathery and oval shaped. Its flowers are white to greenish colored, funnel shaped and produced singly or in clusters of three on stalks. Bonamia menziesii was historically known from scattered locations on Kaua`i, the Waianae Mountains of O`ahu, on Moloka`i, one location on Maui and on the eastern end on the island of Hawai`i. Today, it is known from a total of 28 populations consisting of a few thousand individuals.

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Nature Serve Biotics
  • 05/02/2017

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.

David Orr
  • 01/01/2010

Habitat degradation and possible predation by wild and feral ungulates (pigs, goats, axis deer, black-tailed deer, and cattle). Competition with alien plant species. Fire. (USFWS 1999, 2001)

David Orr
  • 01/01/2010

Kaua`i- Kalalau, Upper Waioli Valley, Limahuli, Hanakapiai to Milolii, Kawaiula Valley, Hipalau Valley, Paaiki Valley, Mount Kahili and Hono O Na Pali, approximately 12 populations, several thousand. O`ahu-Waianae Mountains, 7 to 8 populations, 25-50 individuals and Ko`olau Mountains, 4 populations, 75-100 individuals. Lana`i-Kaa and Paomai, 3 locations, 7 individuals. Hawai`i-Kaupulehu, 1 population, 1 individual. Maui-West Maui, 1 population, 1 individual. (USFWS 1999, 2001)

David Orr
  • 01/01/2010

Propagation-seed, tissue culture. (USFWS 1999)

David Orr
  • 01/01/2010

Waianae Mountains-weed control and monitoring at Army's Makua site. Fenced exclosure at the Navy's Lualualei site. Lana`i-fuel reduction and fire protection plan for the Kanepuu Preserve site. (USFWS 1999) In 2002, the U.S. Fish and Wildlife Service determined that a designation of critical habitat was prudent for this species. (USFWS 2002)

David Orr
  • 01/01/2010

Construct exclosures to protect against wild and feral ungulates. Control competing alien plant species. Enhance wild populations. Protect against fire. (USFWS 1999)

David Orr
  • 01/01/2010

Genetic studies. Physiological studies. Seed banking and germplasm preservation. Propagation. Ex situ site establishment. (USFWS 1999)


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Taxon Bonamia menziesii
Authority A. Gray
Family Convolvulaceae
CPC Number 606
ITIS 30828
Common Names Hawaii lady's nightcap | Menzies' bonamia
Associated Scientific Names Bonamia menziesii | Bonamia menziesii var. rockii
Distribution Found on the islands of Kaua`i, O`ahu, Lana`i, Mau`i, and Hawai`i in scattered populations (USFWS 1999).
State Rank
State State Rank
Hawaii S1

Bonamia menziesii is found on steep slopes as well as on level ground in dry to mesic forest and sometimes in wet forest at elevations between 150-625 meters (USFWS 1999).

Ecological Relationships

Little is known about the life history of this plant. Reproductive cycles, longevity, specific environmental requirements and limiting factors are unknown (USFWS 1999).

Common Name Name in Text Association Type Source InteractionID
Lead Institution State Reintroduction Type Year of First Outplanting

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