Eleocharis flavescens

Eleocharis flavescens is a perennial flowering plant species called bright green spikerush, pale spike-rush, or wrinkle-sheathed spike-rush;[1] it is a type of spikerushes belonging to Juncaceae. It is clump-forming species that also spreads into colonies. It is a small species that looks similar to other Spikerush species. The species is native to temperate North America, the West Indies, and South America.[1]

Bright Green Spikerush
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Clade:	Commelinids
Order:	Poales
Family:	Cyperaceae
Genus:	Eleocharis
Species:	E. flavescens
Binomial name
Eleocharis flavescens (Poir.) Urb.
Synonyms
List Baeothryon flavescens (Poir.) A.Dietr. Eleocharis albivaginata Boeck. Eleocharis albivaginata var. humilis Boeck. Eleocharis albovaginata Boeckeler Eleocharis albovaginata var. flaccida Boeckeler Eleocharis albovaginata var. humilis Boeckeler Eleocharis albovaginata var. macrostachya Boeckeler Eleocharis albovaginata var. stricta Boeckeler Eleocharis albovaginata var. tenuis Boeckeler Eleocharis arechavaletae Boeckeler Eleocharis biocreata Nees Eleocharis dussiana Boeckeler Eleocharis flaccida (Rchb. ex A.Spreng.) Urb. Eleocharis flaccida var. arechavaletae Osten Eleocharis flaccida var. capitata H.Pfeiff. Eleocharis flaccida var. fuscescens Kük. Eleocharis flaccida var. humilis Kük. ex Osten Eleocharis flaccida var. macrostachya Osten Eleocharis flaccida var. olivacea Fernald & Griscom Eleocharis flavescens var. dussiana (Boeckeler) Stehlé Eleocharis flavescens var. flavescens Eleocharis flavescens var. fuscescens (Kük.) Svenson Eleocharis flavescens var. thermalis (Rydb.) Cronquist Eleocharis ochreata (Nees) Steud. Eleocharis ochreata var. flaccida (Rchb. ex A.Spreng.) Boeckeler Eleocharis polymorpha Nees Eleocharis praticola Britton Eleocharis sulciculmis Rchb. ex Kunth Eleocharis thermalis Rydb. Eleogenus ochreatus Nees Eleogenus ochreatus var. flaccidus Nees Eleogenus ochreatus var. minor Nees Scirpus alboater Schrad. ex Nees Scirpus albovaginatus (Boeckeler) Kuntze Scirpus anisochaetus C.Wright Scirpus caribaeus Griseb. Scirpus flaccidus Rchb. ex A.Spreng. Scirpus flavescens Poir. Scirpus gaudichaudianus Kunth Scirpus melanospermus Salzm. ex Steud. Scirpus ochreatus (Nees) Griseb. Scirpus palmaris Willd. ex Kunth Trichophyllum ochreatum (Nees) House Trichophyllum praticola (Britton) House Trichophyllum thermale (Rydb.) House

Varieties

There are two varieties.[1]

Eleocharis flavescens var. olivacea (Torr.) Gleason: is found along shorelines in eastern North America along the Atlantic coast and inland south of the Great Lakes to Minnesota.[2] It is a short caespitose plant with biconvex, green to dark brown, achenes.[2] The achenes have a two-cleft style and bristles that are as long or longer than the achene.[2] The scales of the achene are rounded with round tips and have a green midrib.[2] In Minnesota it reaches its most westerly distribution and it is listed as a Threatened species because of its rarity.[3] It is a wetland species found in only a few locations in Minnesota but this may be due to under collecting because the species is small and looks like other species. In Minnesota, it has been found growing on a mucky lakeshore in a mixed forest, and along a muddy shoreline of a peat pond.[2]

Eleocharis flavescens var. flavescens: with red-brown to dark brown ripe achenes.[1] It grows in southern and western USA, the West Indies, and South America.[1]

Warm springs spike-rush (Eleocharis flavescens var. thermalis) (13822702854)

References

1. "Eleocharis flavescens in Flora of North America @ efloras.org". www.efloras.org. Retrieved 2020-12-29.
2. Barbara Coffin; Lee Pfannmuller (1988). Minnesota's Endangered Flora and Fauna. U of Minnesota Press. p. 91. ISBN 978-0-8166-1689-3.
3. "Eleocharis flavescens (Bright Green Spikerush): Minnesota Wildflowers". www.minnesotawildflowers.info. Retrieved 2020-12-29.