Drosera binata | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Order: | Caryophyllales |
Family: | Droseraceae |
Genus: | Drosera |
Subgenus: | Drosera subg. Ergaleium |
Section: | Drosera sect. Phycopsis Planch. |
Species: | D. binata |
Binomial name | |
Drosera binata | |
Occurrence data from AVH | |
Synonyms | |
Drosera binata, commonly known as the forked sundew or fork-leaved sundew. It is a large, perennial sundew native to Australia and New Zealand. The specific epithet is Latin for "having pairs" - a reference to the leaves, which are dichotomously divided or forked. [3]
Like all sundews, it is a carnivorous plant. It is unique among sundews in having narrow, branching leaves. It is the only species in the Drosera section Phycopsis.
D. binata occurs naturally in Australia, primarily in coastal areas from Fraser Island in Queensland, southwards down through New South Wales and Victoria to Tasmania and the south-east corner of South Australia. The range of this species extends to New Zealand where it is common below an elevation of 1000 metres, being found in both the North and South Islands, Stewart Island / Rakiura and farther afield on the Chathams. [3] Some populations go dormant in the winter, while others are truly tropical.
Plants similar to the type specimen, commonly referred to as the "T-form", were first collected in 1792 by the French exploration of Australia's southern coast led by Bruni d'Entrecasteaux. The naturalist on board that expedition, Jacques Labillardière, first described D. binata in his 1804 publication on the flora of Australia, Novae Hollandiae Plantarum Specimen . The T-form, so named for its single leaf bifurcation spreading into a T-shape, is a robust plant from temperate zones that can grow up to 30 cm (12 in) and has green foliage that becomes redder with age. This form has been described as being genetically stable. [4] [5]
The second observed form, commonly referred to as var. dichotoma, is similar to the T-form, but the foliage is yellower and the leaf typically divides into four terminal leaf points, though it has been known to produce as many as eight leaf points. [4] [5] It was first validly described in an 1819 volume of Rees's Cyclopædia by James Edward Smith as D. dichotoma, based on the description by Joseph Banks and Daniel Solander. This name, however, has since been reduced to synonymy with D. binata. [6] [7] This morphological form was first published as "var. dichotoma" by J. A. Mazrimas in a 1976 volume of the Carnivorous Plant Newsletter , but the publication of that name was invalid under the rules of the International Code of Botanical Nomenclature. Even though the name is not valid, it is still widely used in cultivation to refer to this D. binata form. [4] [6] [8] This was one of many plants used by Charles Darwin in his investigation of carnivorous plants for his 1875 book Insectivorous Plants . [4] [9]
A third described form, often called D. binata f. multifida, has even more leaf divisions, bifurcating several times to produce anywhere from eight to 16 or even 30 terminal leaf points. [4] [5] This, too, was published by J. A. Mazrimas in the same 1976 volume of the Carnivorous Plant Newsletter as var. multifida, referring to the description of a 27-point D. binata found by George Ashley and published in a 1975 volume of the Carnivorous Plant Newsletter. [8] [10] Neither of these names were validly published, but again they remain in use among carnivorous plant growers. A final form, known for producing up to 40 terminal leaf points, is frequently titled f. extrema, another name that has never been validly published but remains in use. [4]
Two cultivars of D. binata have been named. Drosera 'Giant' is a particularly large form of the "var. dichotoma" type and was published by Peter D'Amato in 1998 and registered in 1999. The other, Drosera 'Marston Dragon', was published by Adrian Slack in 1986 and registered in 2001. [6]
Drosera, which is commonly known as the sundews, is one of the largest genera of carnivorous plants, with at least 194 species. These members of the family Droseraceae lure, capture, and digest insects using stalked mucilaginous glands covering their leaf surfaces. The insects are used to supplement the poor mineral nutrition of the soil in which the plants grow. Various species, which vary greatly in size and form, are native to every continent except Antarctica.
Cephalotus is a genus which contains one species, Cephalotus follicularis the Albany pitcher plant, a small carnivorous pitcher plant. The pit-fall traps of the modified leaves have inspired the common names for this plant, which also include Western Australian pitcher plant, Australian pitcher plant, or fly-catcher plant. It is an evergreen herb that is endemic to peaty swamps in the southwestern corner of Western Australia. As with the unrelated Nepenthes, it catches its victims with pitfall traps.
Drosera spatulata, the spoon-leaved sundew, is a variable, rosette-forming sundew with spoon-shaped leaves. The specific epithet is Latin for "spatula shaped," a reference to the form of the leaves. This sundew has a large range and occurs naturally throughout Southeast Asia, southern China and Japan, Micronesia, Papua New Guinea, eastern Australia, Tasmania and New Zealand. Variants are often known by the localities in which they are found. The plant does not form hibernacula in winter, and is easily grown using the same methods as Drosera capensis.
Drosera regia, commonly known as the king sundew, is a carnivorous plant in the sundew genus Drosera that is endemic to a single valley in South Africa. The genus name Drosera comes from the Greek word droseros, meaning "dew-covered". The specific epithet regia is derived from the Latin for "royal", a reference to the "striking appearance" of the species. Individual leaves can reach 70 cm (28 in) in length. It has many unusual relict characteristics not found in most other Drosera species, including woody rhizomes, operculate pollen, and the lack of circinate vernation in scape growth. All of these factors, combined with molecular data from phylogenetic analysis, contribute to the evidence that D. regia possesses some of the most ancient characteristics within the genus. Some of these are shared with the related Venus flytrap (Dionaea muscipula), which suggests a close evolutionary relationship.
Drosera peltata, commonly called the shield sundew or pale sundew, is a climbing or scrambling perennial tuberous species in the carnivorous plant genus Drosera. Among the tuberous sundews, D. peltata has the largest distribution, which includes eastern and western Australia, New Zealand, India, and most of Southeast Asia including the Philippines. The specific epithet is Latin for "shield shaped", a reference to the shape of the cauline leaves. It is either a single extremely variable species, or a complex of several closely related species of uncertain taxonomic boundaries. In Australia at least four forms have had or still have specific taxonomic recognition: Drosera peltata subsp. peltata, D. peltata subsp. auriculata, D. foliosa and D. gracilis.
Drosera anglica, commonly known as the English sundew or great sundew, is a carnivorous flowering plant species belonging to the sundew family Droseraceae. It is a temperate species with a circumboreal range, although it does occur as far south as Japan, southern Europe, and the island of Kauai in Hawaii, where it grows as a tropical sundew. It is thought to originate from an amphidiploid hybrid of D. rotundifolia and D. linearis, meaning that a sterile hybrid between these two species doubled its chromosomes to produce fertile progeny which stabilized into the current D. anglica.
Drosera intermedia, commonly known as the oblong-leaved sundew, spoonleaf sundew, or spatulate leaved sundew, is an insectivorous plant species belonging to the sundew genus. It is a temperate or tropical species native to Europe, southeastern Canada, the eastern half of the United States, Cuba, Hispaniola, and northern South America.
Drosera arcturi is a perennial, insectivorous species of sub-alpine or alpine herb native to Australia and New Zealand. It is one of New Zealand's two alpine species of sundew, the other being Drosera stenopetala. The specific epithet, which translates as "of Arthur" from Latin, is a reference to Mount Arthur, in north-eastern Tasmania, the type locality of the species.
Utricularia dichotoma, commonly known as fairy aprons, is a variable, perennial species of terrestrial bladderwort. It is a widespread species with mauve or purple fan-shaped flowers on a slender stalk and usually grows in wet locations.
There are two native genera of carnivorous plants in New Zealand with fourteen species and four species that have been known to occur in the past.
Drosera zonaria, the painted sundew, is a perennial tuberous species in the carnivorous plant genus Drosera and is endemic to south-west Western Australia from near Perth southeast to near Esperance. It grows in a tight rosette approximately 5 to 7 cm in diameter with 20 to 30 green to red leaves that are arranged in concentric layers. The leaves are typically 1 cm wide and are usually described as being "kidney-shaped" with crimson leaf margins. It grows in deep silica sands in open woodland or coastal heathland and only flowers after a bush fire, which is speculated to be caused by the release of ethylene. Its white, sweetly perfumed flowers, which are very similar to those of D. erythrorhiza, emerge on 4 to 5 cm tall scapes. As with most other tuberous Drosera species, D. zonaria will die back during the dry summer months and retreat to the fleshy tuber 10 to 30 cm below ground.
Drosera gigantea, the giant sundew, is an erect perennial tuberous species in the carnivorous plant genus Drosera that is endemic to Western Australia. It grows in sandy soils at the margins of swamps and near granite outcrops along the Western Australian coast from Albany north to just south of Geraldton. D. gigantea produces small shield-shaped leaves along many lateral branches that look like a small tree. Individual plants can grow up to 0.2–1 m (0.7–3.3 ft) tall. Because of its tall, tree-like form, it is considered one of the largest Drosera species. It is also easily cultivated and enjoys damp, humid conditions often provided in greenhouses. White flowers emerge from August to November. The red tubers of this species can grow to be 3.8 cm (1.5 in) in diameter and may be a metre below ground.
Drosera glanduligera, commonly known as the pimpernel sundew or scarlet sundew, is a species of carnivorous plant endemic to southern Australia. It is an ephemeral annual plant that grows in the winter and flowers from August to November.
Drosera meristocaulis is a perennial species in the carnivorous plant genus Drosera, the only member of the subgenus Meristocaulis. It is a small, rosette- and branched stem-forming sundew that has many morphological affinities to the Australian pygmy sundews. D. meristocaulis is wholly endemic to Pico da Neblina, an isolated mountain on the Brazil-Venezuela border.
Drosera falconeri is a carnivorous plant in the family of Droseraceae. It is endemic to the Northern Territory of Australia.
Drosera peruensis is a carnivorous plant of the genus Drosera, commonly known as the Peruvian sundew. This Drosera species was first identified in Peru in 2002 by Tânia Regina dos Santos Silva and Mireya D. Correa following work to update the genus Drosera for the reference text, Flora Neotropica..
Carnivorous Plants of Australia is a three-volume work on carnivorous plants by Allen Lowrie. The three tomes were published in 1987, 1989, and 1998, by University of Western Australia Press.
Olearia myrsinoides, commonly known as silky daisy-bush or blush daisy bush, is a species of flowering plant in the family Asteraceae and is endemic to south-eastern Australia. It is a spreading shrub with hairy branchlets, egg-shaped to elliptic leaves with toothed edges, and white and yellow or mauve, daisy-like inflorescences.
Drosera magnifica is a species of sundew endemic to Pico do Padre Ângelo in eastern Minas Gerais in southeastern Brazil, where it grows among sandstone outcrops in herbaceous and shrubby vegetation. It is one of the three largest species of Drosera – the other two being D. regia from South Africa and D. gigantea from Australia – and was discovered in 2015 through images which appeared on the social network Facebook. It is the largest New World sundew, and it is closely related to Drosera graminifolia and Drosera spiralis. According to the IUCN Red List categories and criteria, it is considered Critically Endangered. Brazil is home to some 30 species of Drosera.
Hibbertia acicularis, commonly known as prickly guinea-flower, is a species of flowering plant in the family Dilleniaceae and is endemic to eastern Australia. It is an erect or prostrate shrub with linear to lance-shaped leaves and yellow flowers arranged singly in leaf axils with the six to eight stamens joined at the base, in a single cluster.