Haha (Cyanea obtusa)

Listing Status: Endangered

Where Listed: WHEREVER FOUND

General Information

Cyanea obtusa is a shrub in the Campanulaceae (bellflower) family approximately 2 to 5 m (6.6 to 16 ft) tall, with branched pubescent (hairy) stems. Leaves are oblong to oblanceolate, with blades 15 to 30 cm (6 to 12 in) long and 4 to 9 cm (1.6 to 3.5 in) wide, with the upper surface green and sparsely pubescent, and the lower surface pale green and densely pubescent. Inflorescences are 6- to 12-flowered, densely pubescent, with flower stalks 2 to 5 cm (0.8 to 2.0 in) long. The hypanthium (cup structure formed by fusion of calyx and corolla) is obovoid, with narrowly triangular calyx lobes 1 to 2 mm (0.04 to 0.08 in) long. The corolla is purplish, 3 to 3.6 cm (1.2 to 1.4 in) long, 1.5 to 3 mm (0.06 to 0.1 in) wide, and is also densely pubescent. Berries are not described.
Current Listing Status Summary

» Range Information

Current Range
Last Updated: 05-21-2021 - Wherever found
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  • Wherever found

    Listing status: Endangered

    • States/US Territories in which this population is known to or is believed to occur: Hawaii
    • US Counties in which this population is known to or is believed to occur: View All
    • USFWS Refuges in which this population is known to occur: 

» Candidate Information

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Candidate Notice of Review Documents

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» Federal Register Documents

Federal Register Documents

» Species Status Assessments (SSAs)

Species Status Assessments (SSAs)

No Species Status Assessments (SSA's) are currently available for this species.

Special Rule Publications

No Special Rule Publications currently available for this species.

» Conservation Plans

No Conservation Plans currently available for this species.

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» Life History

Habitat Requirements

Cyanea obtusa is known from the mesic forests and wet grassland and shrublands (wet cliff subtype) of west Maui. Associated native plant species within Metrosideros spp. (ohia)-Acacia koa (koa)-Cheirodendron spp. (olapa) forest include Psychotria sp. (kopiko), Pleomele sp. (hala pepe), Nestegis sandwicensis (olopua), Vaccinium calycinum (ohelo), Phyllostegia ambigua, and Diplazium sandwichianum (hoio). On east Maui, the montane-subalpine mesic habitat occurs from 900 to 2,000 m (2,953 to 6,562 ft) with Metrosideros spp. (ohia), Acacia koa (koa) and Nestegis sandwicensis (olopua). Lowland mesic and dry grassland-shrubland is found at 30 to 850 m (98 to 2,789 ft) with Metrosideros, Leptecophylla tameiameiae (pūkiawe), Osteomeles anthyllidifolia (ulei), and Lipochaeta spp.

Movement / Home Range

Cyanea obtusa is endemic to Maui. It was rediscovered on east and west Maui in the early 1980s but by 1989 those plants could not be relocated. In 1997, four individuals were found in Manawainui gulch on east Maui and 5 to 10 individuals were found at Kahakapao gulch. Those at Kahakapao gulch were later determined to be C. elliptica or hybrids with C. elliptica. In 2001, individuals were found on west Maui at Hanaula and Pohakea but were also determined to be hybrids. Currently, there is one wild individual at Manawainui.

Reproductive Strategy

Historically, Cyanea obtusa was likely pollinated by members of the honeyeater family (Meliphagidae) and by native honeycreepers (Drepanididae) (Lunau 2004) that are now extinct, as well as by generalist honeycreepers, which still exist today but no longer overlap in range. Cyanea obtusa has only been reported fruiting in November.

» Other Resources

NatureServe Explorer Species Reports-- NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.

ITIS Reports-- ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.

FWS Digital Media Library -- The U.S. Fish and Wildlife Service's National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video." +

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