Schoenoplectus triqueter | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Clade: | Commelinids |
Order: | Poales |
Family: | Cyperaceae |
Genus: | Schoenoplectus |
Species: | S. triqueter |
Binomial name | |
Schoenoplectus triqueter | |
Present Present in some parts Not present | |
Synonyms | |
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Schoenoplectus triqueter, commonly known as the triangular club-rush , is a species of sedge which lives in temperate Eurasian wetlands, on muddy shores and river margins. It is found across Eurasia, as well as in South Africa, and has been introduced to North America on the west coast. Because of its tolerance of salty habitats, it is considered a halophyte, but plants which were subjected to a high salinity level (10 parts per thousand) in an experiment were noticeably stunted.
Schoenoplectus triqueter is a medium-sized sedge, growing 50–150 centimetres (1.6–4.9 ft) tall, with long, thick (2–10 mm in diameter) rhizomes and thin stems (2–4 mm in diameter). [2] The sedge flowers and fruits in summer; the fruit are small, brown, and bristly. [3] The flowers are wind-pollinated. [4]
S. triqueter spreads both asexually through rhizomes—underground stems which send up new shoots—and sexually through seeds; it spreads by seed far more in cultivation than in the wild. In fact, no seeds were found during surveys of the wild population around the Shannon River. [5]
A 2005 study looked at the effects of varying levels of salinity on S. triqueter's growth habits. The plants subjected to a salinity level of 10 ppt had their growth noticeably stunted relative to the control sample. The plants at 2 ppt, however, were 21% taller with 67%-heavier rhizomes than the control sample. [5] Another study, in Punjab, found that, in general, the length of the plants' roots consistently increased as the salinity of the soil was raised. Other modifications to the root structure, such as an increase in the area of the vascular bundles as the salinity increased. The study concluded that, of the three species it had looked at (S. triqueter, S. juncoides, and S. lacustris ) S. triqueter was the most salt-tolerant, due to its root adapdations. The species is considered a halophyte. [6]
S. triqueter inhabits wetlands, shores, and muddy river banks. [3] [1] The species was classified as "Least Concern" by the IUCN in 2013. In some regions, it is classified as endangered, and the species has been extirpated from the Czech Republic. [7] S. triqueter is also known to be in decline in north-central Europe and in the British Isles. [5] However, it grows prolifically enough in China that it is considered a pest in rice paddies. [5]
In the British Isles, although many populations have been lost due to construction projects and land reclamation, populations in Ireland around the River Shannon persist in some numbers. [8] The species is classified as critically endangered by the Botanical Society of Britain and Ireland. [9] It has been suggested that its distribution is restricted due to the plants' low tolerance of salinity. [5] The main factors driving the species' decline are habitat loss, soil erosion, hybridisation with other related species, and the spread of Phragmites plants. [8] [10] [3] The last known English population, on the River Tamar, died in 2012, but the species has been successfully re-introduced at ten sites. [8]
In Portugal, the species is classified as vulnerable. [11]
In North America, S. triqueter has been introduced in and around the lower Columbia River tidal region, where it is known to produce fertile hybrids with S. tabernaemontani . [12] It is found in southwestern Washington state and adjacent parts of Oregon. [4]
The Cyperaceae are a family of graminoid (grass-like), monocotyledonous flowering plants known as sedges. The family is large; botanists have described some 5,500 known species in about 90 genera – the largest being the "true sedges", with over 2,000 species.
Schoenoplectus acutus, called tule, common tule, hardstem tule, tule rush, hardstem bulrush, or viscid bulrush, is a giant species of sedge in the plant family Cyperaceae, native to freshwater marshes all over North America. The common name derives from the Nāhuatl word tōllin, and it was first applied by the early settlers from New Spain who recognized the marsh plants in the Central Valley of California as similar to those in the marshes around Mexico City.
Schoenoplectus is a genus of plants in the sedge family with a cosmopolitan distribution. Note that the name bulrush is also applied to species in the unrelated genus Typha as well as to other sedges. The genus Schoenoplectus was formerly considered part of Scirpus, but recent phylogenetic data shows that they are not closely related.
Scirpus is a genus of grass-like species in the sedge family Cyperaceae many with the common names club-rush, wood club-rush or bulrush. They mostly inhabit wetlands and damp locations.
Schoeneoplectus californicus is a species of sedge known by the common names California bulrush, southern bulrush and giant bulrush. It is also sometimes called "tule", but the closely related Schoenoplectus acutus is the species most often referred to by that name.
Rhynchospora alba, the white beak-sedge, is a plant in the sedge family, Cyperaceae. It is a tufted herbaceous perennial around 50 cm tall, with white inflorescences that flower in August. The fruit of the sedge is a small achene with a characteristic beak-like cap. It is dispersed by wind or falls by gravity, leading to individuals existing in tight clumps. The species favours wet, acidic and nutrient poor soils, thriving in Sphagnum-dominated bogs, but also peaty grasslands. As such, it is often used as a positive indicator for bog and mire ecosystem health.
Carex pauciflora, the few-flowered sedge, is a perennial species of sedge in the family Cyperaceae native to bogs and fens in cool temperate, subarctic, and mountainous regions of the Northern Hemisphere. The specific epithet pauciflora refers to the Latin term for 'few flowered'.
Juncus articulatus is a flowering plant species in the rush family Juncaceae. It is known by the common name jointleaf rush or jointed rush, which can also refer to J. kraussii from Australia. It is native to Eurasia, Canada, Greenland and much of the United States. It grows in moist areas, such as wet sand, and thrives in calcareous soils. J. articulatus was found to be more sensitive to drought and salt stress than its congeners J. acutus and J. maritimus. It is a perennial herb producing mainly erect stems from a short rhizome. The stem may root at nodes, and it generally has one or more flattened hollow cylindrical leaves up to 10 centimeters long. Transverse internal partitions or joints may be seen or felt in the leaf of the plant.
Ficinia nodosa, the knotted club-rush or knobby club-rush, is a rhizomatous perennial in the family Cyperaceae, native to South Africa, Australia, and New Zealand. Widespread in the Southern Hemisphere, Ficinia nodosa grows to between 15 and 220 cm in height. Although it grows best in sandy, salty soil, the plant grows in a wide variety of environments from coastal sand dunes to alpine regions. F. nodosa’s appearance is characterised by dense clusters of long green stems topped with small, rounded flowers often remaining throughout the year.
Schoenoplectus pungens is a species of flowering plant in the sedge family known as common threesquare, common three-square bulrush and sharp club-rush. It is a herbaceous emergent plant that is widespread across much of North and South America as well as Europe, New Zealand and Australia.
Bolboschoenus maritimus is a species of flowering plant from family Cyperaceae. Common names for this species include sea clubrush, cosmopolitan bulrush, alkali bulrush, saltmarsh bulrush, and bayonet grass. It is found in seaside wetland habitats over much of the world. It is widespread across much of temperate and subtropical Africa, Asia, Europe, North America, South America and various islands.
Schoenoplectus americanus is an American species of flowering plant in the sedge family known by the common names chairmaker's bulrush and Olney's three-square bulrush.
Schoenoplectus heterochaetus is a species of flowering plant in the sedge family known by the common name slender bulrush. It is native to North America, where it can be found in scattered locations in Canada and the United States.
Schoenoplectiella mucronata is a species of flowering plant in the sedge family known by the common names bog bulrush, rough-seed bulrush, and ricefield bulrush. It is native to Eurasia, Africa and Australia. It grows in moist and wet terrestrial habitat, and in shallow water. It is a perennial herb growing from a short, hard rhizome. The erect, three-angled stems grow in dense clumps and can reach a metre tall. The leaves take the form of sheaths wrapped around the base of stem, but they generally do not have blades. The inflorescence is a headlike cluster of cone-shaped spikelets accompanied by an angled, stiff bract which may look like a continuation of the stem.
Schoenoplectus subterminalis is a species of flowering plant in the sedge family known by the common names water bulrush, water club-rush, and swaying bulrush. It is native to North America, where it is known from many parts of the Canada and the United States. It has been common in the northeastern US and eastern Canada as well as the Great Lakes region, as well as many locations in the mountains of the West, though apparently absent from the Southwest and from most of the Great Plains.
Schoenoplectus tabernaemontani is a species of flowering plant in the sedge family known by the common names softstem bulrush, grey club-rush, and great bulrush. It can be found throughout much of the world; it has been reported from every state in the United States, and from every province and territory in Canada except Nunavut. It grows in moist and wet habitat, and sometimes in shallow water.
Carex binervis, the green-ribbed sedge, is a European species of sedge with an Atlantic distribution. It is found from Fennoscandia to the Iberian Peninsula, and occurs in heaths, moorland and other damp, acidic environments. It typically grows to a height of 15–120 cm (6–50 in), and has inflorescences comprising one male and several female spikes, each up to 45 mm (1.8 in) long. The utricles have two conspicuous green veins, which give rise to both the scientific name and the common name of the species. In the vegetative state, it closely resembles C. bigelowii, a species that usually grows at higher altitude. C. binervis was first described by James Edward Smith in 1800, and is classified in Carex sect. Spirostachyae; several hybrids with other Carex species are known.
Carex bigelowii is a species of sedge known by the common names Bigelow's sedge, Gwanmo sedge, and stiff sedge. It has an Arctic–alpine distribution in Eurasia and North America, and grows up to 50 centimetres (20 in) tall in a variety of habitats.
Schoenoplectus lacustris, the lakeshore bulrush or common club-rush, is a species of club-rush that grows in fresh water across Europe and some neighbouring areas.