Dicranopteris linearis | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Division: | Polypodiophyta |
Class: | Polypodiopsida |
Order: | Gleicheniales |
Family: | Gleicheniaceae |
Genus: | Dicranopteris |
Species: | D. linearis |
Binomial name | |
Dicranopteris linearis | |
Synonyms [2] | |
List
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Dicranopteris linearis is a common species of fern known by many common names, including Old World forked fern, uluhe (Hawaiian), and dilim (Filipino). It is one of the most widely distributed ferns of the wet Old World tropics and adjacent regions, including Polynesia and the Pacific. [3] In parts of the New World tropics its niche is filled by its relative, Dicranopteris pectinatus . [3]
This rhizomatous fern spreads via cloning, spreading along the ground and climbing on other vegetation, often forming thickets 3 metres deep or more. The stem grows from the rhizome, branches at a 45° angle, and forms fronds that continue to bud and branch. In this way the growth can continue for a long distance as the plant forms a mat, grows over itself in layers, and spreads. [4] When climbing, the leafy branches can reach over 6 metres long [5] and can climb 10 high when supported by a tree. [3] The ultimate segments of the leaves are linear in shape, up to 7 centimeters long by a few millimeters wide. The undersides are hairy and sometimes waxy. [6] It can also reproduce via spores. [4]
The fern grows easily on poorly drained, nutrient-poor soils and in disturbed habitats and steep slopes. [3] [4] It does not tolerate shade, so once established it will eventually be shaded out by taller vegetation unless it climbs above it. [3] It may suppress the growth of new stands of trees, especially when it becomes a dense thicket. [3]
The fern is a keystone species in Hawaiian ecosystems, and dominates many areas in Hawaiian rainforests. [3] It occurs on all the main Hawaiian islands. [4] As a pioneer species in ecological succession, it can colonize bare sites such as lava flows, talus, and abandoned roads. When the fern grows onto a new site it produces layers of stems and leaves repeatedly until there is a network of vegetation. The leaves die and the stems are very slow to decompose, so the network persists. The network then fills with organic forest detritus, forming a litter layer which can be a meter thick. The network is penetrated by the fern's rhizomes and roots, such that the fern serves as its own substrate. [3] Where the fern is eliminated, invasive species of plants can move in, so "one important function" of the fern is to prevent these plants from encroaching on the rainforest. [3] The fern may have allelopathic effects, preventing the growth of other plants. [7] Also, the fern is a very productive member of the forest ecosystem; despite being a relatively small amount of the biomass in the forest it accounts for over half of the primary productivity in some areas. [3]
This plant is used medicinally to treat intestinal worms in Indochina, skin ulcers and wounds in New Guinea, and fever in Malaysia. [8] In vitro samples of the fern kill bacteria. [8]
The Diliman district in Quezon City in the Philippines' National Capital Region derived its name from Dicranopteris linearis, locally known as "Dilim" (the suffix "-an" indicates a place where something, in this case the fern, is common). As such, it is also the origin of the name of the University of the Philippines Diliman campus. [9]
The fiddleheads of the fern are used in floral arrangements. [4]
The tree ferns are arborescent (tree-like) ferns that grow with a trunk elevating the fronds above ground level, making them trees. Many extant tree ferns are members of the order Cyatheales, to which belong the families Cyatheaceae, Dicksoniaceae, Metaxyaceae, and Cibotiaceae. It is estimated that Cyatheales originated in the early Jurassic, and is the third group of ferns known to have given rise to tree-like forms. The others are the extinct Tempskya of uncertain position, and Osmundales where the extinct Guaireaceae and some members of Osmundaceae also grew into trees. In addition there were the Psaroniaceae and Tietea in the Marattiales, which is the sister group to most living ferns including Cyatheales.
A vine is any plant with a growth habit of trailing or scandent stems, lianas, or runners. The word vine can also refer to such stems or runners themselves, for instance, when used in wicker work.
The order Cyatheales, which includes most tree ferns, is a taxonomic order of the fern class, Polypodiopsida. No clear morphological features characterize all of the Cyatheales, but DNA sequence data indicate the order is monophyletic. Some species in the Cyatheales have tree-like growth forms from a vertical rhizome, others have shorter or horizontal expanding rhizomes.
Mount Bartle Frere is the highest mountain in Queensland at an elevation of 1,611 metres (5,285 ft). The mountain was named after Sir Henry Bartle Frere, a British colonial administrator and then president of the Royal Geographical Society by George Elphinstone Dalrymple in 1873. Bartle Frere was British Governor of Cape Colony at the outset of the Anglo-Zulu War.
The Hawaiian tropical rainforests are a tropical moist broadleaf forest ecoregion in the Hawaiian Islands. They cover an area of 6,700 km2 (2,600 sq mi) in the windward lowlands and montane regions of the islands. Coastal mesic forests are found at elevations from sea level to 300 m (980 ft). Mixed mesic forests occur at elevations of 750 to 1,250 m, while wet forests are found from 1,250 to 1,700 m. Moist bogs and shrublands exist on montane plateaus and depressions. For the 28 million years of existence of the Hawaiian Islands, they have been isolated from the rest of the world by vast stretches of the Pacific Ocean, and this isolation has resulted in the evolution of an incredible diversity of endemic species, including fungi, mosses, snails, birds, and other wildlife. In the lush, moist forests high in the mountains, trees are draped with vines, orchids, ferns, and mosses. This ecoregion includes one of the world's wettest places, the slopes of Mount Waiʻaleʻale, which average 373 in (9,500 mm) of rainfall per year.
Elymus repens, commonly known as couch grass, is a very common perennial species of grass native to most of Europe, Asia, the Arctic biome, and northwest Africa. It has been brought into other mild northern climates for forage or erosion control, but is often considered a weed.
Bambusa vulgaris, common bamboo, is an open-clump type bamboo species. It is native to Indochina and to the province of Yunnan in southern China, but it has been widely cultivated in many other places and has become naturalized in several regions. Among bamboo species, it is one of the largest and most easily recognized.
Eugenia koolauensis, commonly known as Koʻolau eugenia or nioi, is a species of flowering plant in the myrtle family, Myrtaceae. It is endemic to Hawaii, where it could previously be found on the islands of Molokaʻi and Oʻahu; today populations only exist on the latter. This is a federally listed endangered species of the United States.
Melicope pallida, the pale melicope, is a species of tree in the family Rutaceae. It is endemic to the Hawaiian Islands. It is threatened by habitat loss. It is a federally listed endangered species of the United States. Like other Hawaiian Melicope, this species is known as alani.
In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are usable as lumber or plants above a specified height. In wider definitions, the taller palms, tree ferns, bananas, and bamboos are also trees.
Aloiampelos ciliaris, formerly Aloe ciliaris, the common climbing-aloe, is a thin, tough, rapidly growing succulent plant from South Africa.
Cyanea rivularis is a rare species of flowering plant in the bellflower family known by the common name plateau cyanea. It is endemic to Hawaii, where it is known only from the island of Kauaʻi. There are three small populations of the plant remaining in the wild, for a total of 19 individual plants. The plant was federally listed as an endangered species of the United States in 1996.
Dubautia latifolia is a rare species of flowering plant in the family Asteraceae known by the common name koholapehu. It is endemic to Hawaii where it is known only from the west side of the island of Kauai. Like other Dubautia this plant is called na`ena`e.
Exocarpos luteolus is a rare species of flowering plant in the sandalwood family known by the common names leafy ballart or heau. It is endemic to Hawaii, where it is known only from the island of Kauai. There are eight populations remaining, for a total global population of only 39 individuals. The plant was federally listed as an endangered species of the United States in 1994.
Lygodium japonicum is a species of fern that is known by the common names vine-like fern and Japanese climbing fern. It is native to eastern Asia, including Taiwan, Japan, Korea, southeastern Asia, and India, and eastern Australia. The fern is present in the southeastern United States and Puerto Rico as an introduced species.
Elymus lanceolatus is a species of grass known by the common names thickspike wheatgrass and streamside wheatgrass. It is native to North America, where it is widespread and abundant in much of Canada and the western and central United States. There are two subspecies, subsp. lanceolatus occurring throughout the species' range and subsp. psammophilus occurring in the Great Lakes region.
Panicum hemitomon is a species of grass known by the common name maidencane. It is native to North America, where it occurs along the southeastern coastline from New Jersey to Texas. It is also present in South America.
Olyra latifolia, commonly known as carrycillo, is a species of bamboo in the grass family Poaceae. It occurs in Mexico, Central and South America, and in sub-Saharan Africa. It is a common species, up to 5 m (16 ft) tall, growing prolifically in rainforests, particularly near the margins.
Tasmania is home to 'Australia’s largest cool temperate rainforests. Most of Tasmania’s rainforests occur in the North-West and throughout the North East highlands. Cool temperate rainforests typically have a heavy rainfall, cool climate, favor high altitudes and have a limited availability of light.
Dipteris conjugata is a species of fern. It has a rhizome, and 2-3 tall stems with mid green or dark green fronds, which have several divisions to toothed lobes. It is grows in clearings, mountain ridges and in forest margins, from tropical and temperate Asia, northern Queensland in Australia and some islands in the Pacific Ocean. It has limited native medicinal uses.