Hibiscus Tiliaceus
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Hibiscus Tiliaceus

Hibiscus tiliaceus
Fleur de p?rau (hibiscus tiliaceus).jpg
Sea hibiscus from Tahiti
Hibiscus tiliaceus Blanco2.274-cropped.jpg
Sea hibiscus from Flora de Filipinas (Francisco Manuel Blanco, 1880-1883)

Secure (NatureServe)[1]
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malvales
Family: Malvaceae
Genus: Hibiscus
Species:
H. tiliaceus
Binomial name
Hibiscus tiliaceus
Synonyms[2]

Talipariti tiliaceum (L.) Fryxell

Hibiscus tiliaceus is a species of flowering tree in the mallow family, Malvaceae, that is native to the Old World tropics.[3] Common names include sea hibiscus, beach hibiscus, coastal (or coast) hibiscus, coastal (or coast) cottonwood, green cottonwood, native hibiscus, native rosella, cottonwood hibiscus, kurrajong, sea rosemallow, balibago (Tagalog), malabago or malbago (Cebuano - Southern), maribago (Cebuano - Northern), waru (Javanese), baru or bebaru (Malay), hau (Hawaiian), fau (Samoan), purau (Tahitian), and vau tree. The specific epithet, "tiliaceus", refers to its resemblance of the leaves to those of the related Tilia species.[4]

Description

Hibiscus tiliaceus reaches a height of 4-10 m (13-33 ft), with a trunk up to 15 cm (5.9 in) in diameter.[3] The flowers of H. tiliaceus are bright yellow with a deep red center upon opening. Over the course of the day, the flowers deepen to orange and finally red before they fall. The branches of the tree often curve over time. The leaves are heart shaped and deep red in the var. rubra.

Distribution and habitat

Hibiscus tiliaceus is a common coastal plant in Eastern and Northern Australia,[5]Oceania, Maldives, South Asia, and Southeast Asia. It has become naturalized in parts of the New World, such as Florida, Puerto Rico, and the Virgin Islands.[3] It is uncertain if the species is native to Hawaii, as it may have been introduced by the Polynesians.[4]Hibiscus tiliaceus can be found at elevations from sea level to 800 m (2,600 ft) in areas that receive 900-2,500 mm (35-98 in) of annual rainfall. It is commonly found growing on beaches, by rivers and in mangrove swamps. Sea Hibiscus is well adapted to grow in coastal environment in that it tolerates salt and waterlogging and can grow in quartz sand, coral sand, marl, limestone,[6] and crushed basalt.[7] It grows best in slightly acidic to alkaline soils (pH of 5-8.5).[6] The plant lends its name to a coastal community in Cotton Tree, Queensland, Australia.

Uses

Sea hibiscus from Hawaii

The wood of H. tiliaceus has a specific gravity of 0.6. It has been used in a variety of applications, such as seacraft construction, firewood, and wood carvings. It is easy to plane and turns well, so it is regarded by many as a high quality furniture wood. Plant fibers taken from the stems have traditionally been used in rope making,[8] while its bark has been used like cork, in sealing cracks in boats. The bark and roots may be boiled to make a cooling tea to cool fevers, and its young leafy shoots may be eaten as vegetables. Native Hawaiians used the wood to make ʻiako (spars) for waʻa (outrigger canoes), mouo (fishing net floats), and ʻau koʻi (adze handles). Kaula ʻilihau (cordage) was made from the bast fibers.[9]Hau would be used to make ʻama (canoe floats) if wiliwili (Erythrina sandwicensis) was unavailable.[10]

Hibiscus tiliaceus is widely used in Asian countries as a subject for the art of bonsai, especially Taiwan. The finest specimens are taken from Kenting National Park. Lending itself to free grafting, the leaf size is reduced fairly quickly.

In Indonesia H. tiliaceus is also used for fermenting tempeh. The undersides of the leaves are covered in downy hairs known technically as trichomes to which the mold Rhizopus oligosporus can be found adhering in the wild. Soybeans are pressed into the leaf, and stored. Fermentation occurs resulting in tempeh.[11]

Chemistry

Cyanidin-3-glucoside is the major anthocyanin found in flowers of H. tiliaceus.[12] Leaves of H. tiliaceus displayed strong free radical scavenging activity and the highest tyrosinase inhibition activity among 39 tropical plant species in Okinawa[13] and Konnichiwa. With greater UV radiation in coastal areas, it is possible that leaves and flowers of natural coastal populations of H. tiliaceus have stronger antioxidant properties than planted inland populations.[14]

See also

References

  1. ^ "Hibiscus tiliaceus". NatureServe Explorer. NatureServe. Retrieved .
  2. ^ "Talipariti tiliaceum". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved .
  3. ^ a b c Little Jr., Elbert L.; Roger G. Skolmen (1989). "Hau, sea hibiscus" (PDF). Common Forest Trees of Hawaii (Native and Introduced). United States Forest Service. Retrieved .
  4. ^ a b Motooka, P.; L. Castro; D. Nelson; G. Nagai; L. Ching. "Hibiscus tiliaceus Hau" (PDF). Weeds of Hawai?i's Pastures and Natural Areas; An Identification and Management Guide. University of Hawai?i at M?noa. Retrieved .
  5. ^ "Hibiscus tiliaceus". PlantNET - NSW Flora Online. Retrieved 2019.
  6. ^ a b Elevitch, Craig R.; Lex A.J. Thomson (April 2006). "Hibiscus tiliaceus (beach hibiscus)" (PDF). The Traditional Tree Initiative. Cite journal requires |journal= (help)
  7. ^ Allen, James A. (2003-01-01). "Hibiscus tiliaceus L." (PDF). Tropical Tree Seed Manual. Reforestation, Nurseries & Genetics Resources. Retrieved .
  8. ^ Standley, Paul C.; Blake, S. F. (1923). "Trees and Shrubs of Mexico (Oxalidaceae-Turneraceae)". Contributions from the United States National Herbarium. Washington, D.C.: Department of Botany, Smithsonian Institute. 23 (3): 780. JSTOR 23492504.
  9. ^ "hau, hau ka?eka?e". Hawaii Ethnobotany Online Database. Bernice P. Bishop Museum. Archived from the original on 2007-07-02. Retrieved .
  10. ^ Medeiros, A. C.; C.F. Davenport; C.G. Chimera (1998). "Auwahi: Ethnobotany of a Hawaiian Dryland Forest" (PDF). Cooperative National Park Resources Studies Unit, University of Hawai?i at M?noa. Cite journal requires |journal= (help)
  11. ^ Shirtleff, William; Akiko Aoyagi (1979). "The Book of Tempeh" (PDF). Soyinfo Center, Harper and Row. Cite journal requires |journal= (help)
  12. ^ Lowry, J.B. (1976). "Floral anthocyanins of some Malesian Hibiscus species". Phytochemistry 15: 1395-1396.
  13. ^ (Masuda et al., 1999; 2005)
  14. ^ (Wong et al., 2009; Wong & Chan, 2010).

Bibliography

  • Masuda, T., Yonemori, S., Oyama, Y., Takeda, Y., Tanaka, T., Andoh, T., Shinohara, A., Nakata, M. (1999). "Evaluation of the antioxidant activity of environmental plants: activity of the leaf extracts from seashore plants". Journal of Agricultural and Food Chemistry 47: 1749-1754.
  • Masuda, T., Yamashita, D., Takeda, Y., Yonemori, S. (2005). "Screening for tyrosinase inhibitors among extracts of seashore plants and identification of potent inhibitors from Garcinia subelliptica". Bioscience, Biotechnology, and Biochemistry 69: 197-201.
  • Wong, S.K., Lim, Y.Y., Chan, E.W.C. (2009). "Antioxidant properties of Hibiscus: Species variation, altitudinal change, coastal influence and floral colour change". Journal of Tropical Forest Science 21(4): 307-315. http://info.frim.gov.my/cfdocs/infocenter_application/jtfsonline/jtfs/[permanent dead link] V21n4/307-315.pdf.
  • Wong, S.K., Chan, E.W.C. (2010). "Antioxidant properties coastal and inland populations of Hibiscus tiliaceus". ISME/GLOMIS Electronic Journal 8(1): 1-2. http://www.glomis.com/ej/pdf/EJ_8-1.pdf.

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