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PlantFiles: Clay's Hibiscus, Red Kauai Rosemallow
Hibiscus clayii

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Family: Malvaceae (mal-VAY-see-ee) (Info)
Genus: Hibiscus (hi-BIS-kus) (Info)
Species: clayii (KLAY-ee-eye) (Info)

Synonym:Hibiscus newhousei

» View all varieties of Hibiscus

3 members have or want this plant for trade.

Height:
6-8 ft. (1.8-2.4 m)

Spacing:
15-18 in. (38-45 cm)

Hardiness:
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Sun to Partial Shade

Bloom Color:
Red

Bloom Time:
Unknown - Tell us

Foliage:
Unknown - Tell us

Other details:
This plant may be considered a protected species; check before digging or gathering seeds
Suitable for growing in containers

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

Propagation Methods:
From herbaceous stem cuttings
From woody stem cuttings
From softwood cuttings
From semi-hardwood cuttings
From seed; winter sow in vented containers, coldframe or unheated greenhouse

Seed Collecting:
Bag seedheads to capture ripening seed
Allow pods to dry on plant; break open to collect seeds
Seed does not store well; sow as soon as possible

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Profile:

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1 neutral
No negatives

Gardeners' Notes:

RatingAuthorContent
Neutral htop On Dec 13, 2007, htop from San Antonio, TX (Zone 8b) wrote:

I have not grown this plant. Hibiscus clayi (also known as Hawaiian red hibiscus, Newhouse hibiscus) is an endemic Hawaiian shrub or small tree from 4 to 8 meters tall with single bright red flowers at the end of the branches. The branch tips have soft hairs. It similar to H. kokio. In its natural habitat, it is found in lowland dry forests. Hibiscus clayi was found at scattered locations on State and private land on the island of Kaua`i. As of 2001, only the Nounou Mountains population of a 4 trees was still known to exist (only 4 in 1995 also ). Cattle caused a great deal of damage to the Hisbiscus clayi habitat which contributed to the species decline. Presently, weeds (especially competition with alien plants) and feral pigs are the major threat as well as a hiking trail close to most of the plants which make them prone to human disturbance. Of course, USFWS has it classified as an endangered.

Its primary custodian is the Waimea Valley Audubon Center. Restoration. In 1995, 11 plants were outplanted at Kalepa and Nounou Forest Reserves and other restoration projects have been implemented. May this plant be blessed and watched over so it may again flourish for all to admire.



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