Juncus marginatus | |
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Scientific classification
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Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Clade: | Commelinids |
Order: | Poales |
Family: | Juncaceae |
Genus: | Juncus |
Species: | J. marginatus
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Binomial name | |
Juncus marginatus Rostk.
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Synonyms [1] | |
List
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Juncus marginatus is a species of flowering plant, it is a type of rush with the common names of margined rush and grass-leaf rush. [2]
Juncus marginatus is a grass-like, herbaceous, short-lived perennial growing from short rhizomes. [3] Plants produce dense tufts or clumps growing 30-130 cm tall. [4] The plants are sometimes rhizomatous. The leaf blades are flat. The flowers are grouped together into a terminal inflorescence called a glomerulus. [5] Each flower has three stamens and three sharply acute sepals that are reddish-brown in color. The plump and ribbed seeds are produced in a rounded and beakless capsule. The small yellow to light brown seeds are spindle-shaped, and around 0.5mm in length and lack a tail but have sharp points on either end (apiculate). [3] [4] The diploid chromosome count is 38. [4]
Juncus marginatus grows in North America in the Eastern and Southeastern US, ranging to Texas and South Dakota. [5] It is also found Ontario Canada, California, Colorado, New Mexico, Oregon, New Mexico, the West Indies (Cuba), and Central America; where is found growing in moist to wet bogs, on shorelines, in marshes and ditches - with sandy, peaty, or clayey soils. [4] One historic population existed in Minnesota until 1999 when other small populations were found in Anoka County; because of its rarity it was listed as an endangered specie in the state. [3] In Minnesota the species is found growing in shallow wetlands/prairies of the Anoka Sand Plain where the normally dry sandy ground dips below the water table. [3]