Heliotropium arboreum | |
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In the Hawaiian Islands | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Boraginales |
Family: | Boraginaceae |
Genus: | Heliotropium |
Species: | H. arboreum |
Binomial name | |
Heliotropium arboreum (Blanco) Mabb. | |
Synonyms | |
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Heliotropium arboreum is a species of flowering plant in the borage family, Boraginaceae. It is native to tropical Asia including southern China, Madagascar, northern Australia, and most of the atolls and high islands of Micronesia and Polynesia. Common names include velvetleaf soldierbush, [2] tree heliotrope, veloutier, and octopus bush. It is a shrub or small tree typical of littoral zones reaching a height of 3.6 m (12 ft), with a spread of about 5 m (16 ft).[ citation needed ]
Originally published as Tournefortia argentea, it was transferred to Argusia argentea, and remained under that name until recently. It was subsequently restored to the genus Tournefortia before being transferred into the genus Heliotropium under a new name in 2003. [3] [4]
The Tree Heliotrope is a small to medium sized growing tree that typically reaches heights of 3.7 metres (12 ft). The leaves of this tree are light green in color, silvery in sheen, and silky in texture. The tree produces small fruits and flowers during its bloom, (May through November). The flowers are tiny, only reaching 0.61 centimetres (0.24 in) in diameter, white, and do not begin to appear until the tree has reached a few years of age. The fruits it produces are small, opaque and fleshy. The bark is light gray/brown and is corrugated.
The wood of H. arboreum is commonly used to make handicrafts, tools, and, in Polynesia, frames for swim goggles. Due to its availability, H. arboreum is used as firewood, and has become rare in some areas as a result. [5]
In the Marshall Islands, corpses are washed in water soaked with the leaves of the tree heliotrope to mask smells. The leaves are used as a spice on some islands, and can also be eaten raw as a salad. In Kiribati, oil from the leaves is used to make deodorant. [6]
Octopus bush is used in many Pacific islands as a traditional medicine to treat ciguatera fish poisoning, which is caused by powerful ciguatoxins produced by microscopic Gambierdiscus algae. Scientists from the Institute of Research for Development (IRD) and the Louis Malarde Institute in French Polynesia and Pasteur Institute in New Caledonia are researching the plant chemistry and believe that senescent leaves contain rosmarinic acid and derivatives, which are known for its antiviral, antibacterial, antioxidant, and anti-inflammatory properties. [7] The researchers think that rosmarinic acid removes the ciguatoxins from their sites of action, as well as being an anti-inflammatory agent.
The preferred growing conditions of ''H. Arboreum'' are in the littoral zone. It thrives in sandy barren soil with high drainage. It is capable of withstanding sea spray, and can grow in heavy winds. The tree is also a drought resistant variety, allowing it to survive the subtropical dry season of the South Pacific. These factors, plus the roots of "H. Arboreum" taking hold in the sand, help stabilize the shore, mitigating coastal erosion. [5] [6]
Boraginaceae, the borage or forget-me-notfamily, includes about 2,000 species of shrubs, trees, and herbs in 146 to 156 genera with a worldwide distribution.
Ciguatera fish poisoning (CFP), also known simply as ciguatera, is a foodborne illness caused by eating reef fish whose flesh is contaminated with certain toxins called ciguatoxins. Such individual fish are said to be ciguatoxic. Symptoms may include diarrhea, vomiting, numbness, itchiness, sensitivity to hot and cold, dizziness, and weakness. The onset of symptoms varies with the amount of toxin eaten from half an hour to up to two days. The diarrhea may last for up to four days. Some symptoms typically remain for a few weeks to months. Heart difficulties such as slow heart rate and low blood pressure may also occur.
Bokak Atoll or Taongi Atoll is an uninhabited coral atoll in the Ratak Chain of the Marshall Islands, in the North Pacific Ocean. Due to its relative isolation from the main islands in the group, Bokak's flora and fauna has been able to exist in a pristine condition.
Thespesia populnea, commonly known as the portia tree, Pacific rosewood, Indian tulip tree, or milo, among other names, is a species of flowering plant belonging to the mallow family, Malvaceae. It is a tree found commonly on coasts around the world. Although it is confirmed to be native only to the Old World tropics, other authorities consider it to have a wider, possibly pantropical native distribution. It is thought to be an invasive species in Florida and Brazil.
The Austral Islands are the southernmost group of islands in French Polynesia, an overseas country of the French Republic in the South Pacific. Geographically, they consist of two separate archipelagos, namely in the northwest the Tupua'i islands consisting of the Îles Maria, Rimatara, Rūrutu, Tupua'i Island proper and Ra'ivāvae, and in the southeast the Bass Islands composed of the main island of Rapa Iti and the small Marotiri. Inhabitants of the islands are known for their pandanus fiber weaving skills. The islands of Maria and Marotiri are not suitable for sustained habitation. Several of the islands have uninhabited islets or rocks off their coastlines. Austral Islands' population is 6,965 on almost 150 km2 (58 sq mi). The capital of the Austral Islands administrative subdivision is Tupua'i.
Hibiscus tiliaceus, commonly known as the sea hibiscus or coast cottonwood, is a species of flowering tree in the mallow family, Malvaceae, with a pantropical distribution along coastlines. It has also been introduced to Florida and New Zealand. It has been debated whether this species is native or introduced to Hawaii.
Pandanus tectorius is a species of Pandanus (screwpine) that is native to Malesia, Papuasia, eastern Australia, and the Pacific Islands. It grows in the coastal lowlands typically near the edge of the ocean. Common names in English include thatch screwpine, Tahitian screwpine, hala tree and pandanus. The fruit is edible and sometimes known as hala fruit.
Heliotropium is a genus of flowering plants in the heliotrope family, Heliotropiaceae. There are around 325 species in this almost cosmopolitan genus, which are commonly known as heliotropes. They are highly toxic to dogs and cats.
Phacelia is a genus of about 200 species of annual or perennial herbaceous plants in the borage family, native to North and South America. California is particularly rich in species with over 90 recorded in the region.
Boraginales is an order of flowering plants in the asterid clade, with a total of about 125 genera and 2,700 species. Different taxonomic treatments either include only a single family, the Boraginaceae, or divide it into up to eleven families. Its herbs, shrubs, trees and lianas (vines) have a worldwide distribution.
Sida fallax, known as yellow ilima or golden mallow, is a species of herbaceous flowering plant in the Hibiscus family, Malvaceae, indigenous to the Hawaiian Archipelago and other Pacific Islands. Plants may be erect or prostrate and are found in drier areas in sandy soils, often near the ocean. ʻIlima is the symbol of Laloimehani and is the flower for the islands of Oʻahu, Hawaiʻi, and Abemama, Kiribati.
The wildlife of the Maldives includes the flora and fauna of the islands, reefs, and the surrounding ocean. Recent scientific studies suggest that the fauna varies greatly between atolls following a north–south gradient, but important differences between neighbouring atolls were also found, which may be linked to differences in fishing pressure – including poaching.
The blue lorikeet is a small lorikeet from French Polynesia and the Cook Islands. It is also known as the Tahiti lorikeet, violet lorikeet, Tahitian lory, blue lory, nunbird, and the indigo lory. It was formerly found on 23 islands around Tahiti, but now restricted to perhaps eight islands: Aitutaki, Apataki, Arutua, Kaukura, Manuae, Maupihaa, Motu One, Rangiroa, and possibly Manihi and Manuae. Its plumage is mainly dark blue and it has a white area over its upper chest, throat and face. The first captive breeding in the UK was by the Marquess of Tavistock in the 1930s. He was awarded a silver medal by the Foreign Bird League for this achievement.
Myrsine is a genus of flowering plants in the family Primulaceae. It was formerly placed in the family Myrsinaceae before this was merged into the Primulaceae. It is found nearly worldwide, primarily in tropical and subtropical areas. It contains over 280 species, including several notable radiations, such as the matipo of New Zealand and the kōlea of Hawaiʻi. In the United States, members of this genus are known as colicwood. Some species, especially M. africana, are grown as ornamental shrubs.
Heliotropium curassavicum, commonly called salt heliotrope, a species of flowering plant in the borage family (Boraginaceae). It is native to much of the Americas, from Canada to Argentina, including the West Indies and Hawaii. It can be found as an introduced, and sometimes invasive, species in Africa, Asia, Australia, and Europe. It thrives in salty soils, such as beach sand, alkali flats, and salt marshes. It is often found in disturbed coastal sites.
Heliotropium anomalum is a species of flowering shrub in the borage family, Boraginaceae, that is native to the Hawaiian Islands, Guam, Christmas Island, Saipan, Tinian, Wake Island and New Caledonia. Common names include Polynesian heliotrope, Pacific heliotrope, Scrub heliotrope and hinahina kū kahakai (Hawaiian). H. a. var. argenteum is the official flower of the island Kahoʻolawe in Hawaii.
Heliotropiaceae are a cosmopolitan family of flowering plants with approximately 450 species worldwide, though it is concentrated especially in the tropics and subtropics.
The Central Polynesian tropical moist forests is a tropical and subtropical moist broadleaf forests ecoregion in Polynesia. It includes the northern group of the Cook Islands, the Line Islands in Kiribati, and Johnston Atoll, Jarvis Island, Palmyra Atoll, and Kingman Reef which are possessions of the United States.
The Western Polynesian tropical moist forests is a tropical and subtropical moist broadleaf forests ecoregion in Polynesia. It includes Tuvalu, the Phoenix Islands in Kiribati, Tokelau, and Howland and Baker islands, which are possessions of the United States.