You selected Juncus imbricatus var. chamissonis (Kunth) Buchenau. This is a synonym for:

Accepted scientific name:
Juncus imbricatus Laharpe (accepted name) 1 literature reference for Juncus imbricatus Laharpe
Synonyms:
Juncus capillaceus var. chilensis Buchenau (synonym) 1 literature reference for Juncus capillaceus var. chilensis Buchenau
Juncus chamissonis Kunth (synonym) 1 literature reference for Juncus chamissonis Kunth
Juncus chamissonis forma pusillus Buchenau (synonym)
Juncus collinus Steud. (synonym) 1 literature reference for Juncus collinus Steud.
Juncus imbricatus var. chamissonis (Kunth) Buchenau (synonym)
Juncus imbricatus var. lechleri (Steud.) Buchenau (synonym)
Juncus lechleri Steud. (synonym) 1 literature reference for Juncus lechleri Steud.
Juncus pringlei Fernald (synonym) 1 literature reference for Juncus pringlei Fernald
Juncus spanianthus Steud. (synonym) 1 literature reference for Juncus spanianthus Steud.
Juncus urvillei Steud. (synonym) 1 literature reference for Juncus urvillei Steud.
Common names: -
Classification:
Plantae
Phylum Magnoliophyta
Class Liliopsida
Order Poales
Family Juncaceae
Genus Juncus
Distribution: Argentina Northeast, Southern South America, Southern America; Argentina Northwest, Southern South America, Southern America; Bolivia, Western South America, Southern America; Brazil South, Brazil, Southern America; Cape Provinces, Southern Africa, Africa; Chile Central, Southern South America, Southern America; Chile South, Southern South America, Southern America; Colombia, Western South America, Southern America; Ecuador, Western South America, Southern America; Juan Fernández Is., Southern South America, Southern America; Mexico Central, Mexico, Northern America; Mexico Gulf, Mexico, Northern America; Mexico Northeast, Mexico, Northern America; Mexico Southwest, Mexico, Northern America; New South Wales, Australia, Australasia; New Zealand South, New Zealand, Australasia; Peru, Western South America, Southern America; Portugal, Southwestern Europe, Europe; Spain, Southwestern Europe, Europe; Uruguay, Southern South America, Southern America; Victoria, Australia, Australasia
Additional data: Native in South America, in the Andes from Colombia to N Argentina, and in Chile, Uruguay, E and C Argentina. Probably an established alien in Mexico, introduced in South Africa, New Zealand, Australia, Spain and Portugal.
Source database: IOPI-GPC, 10.0, Aug 2007
Latest taxonomic scrutiny: Kirschner J., 2002
Online resource: http://www.bgbm.org/IOPI/GPC/PTaxonDetail.asp?RIDentifier=345
CoL taxon LSID: urn:lsid:catalogueoflife.org:taxon:e61494e6-29c1-102b-9a4a-00304854f820:ac2010