NVCS

CEGL003486 Juncus arcticus ssp. littoralis - (Juncus mexicanus) Wet Meadow

Type Concept Sentence: This seasonally flooded perennial grassland is dominated by Juncus arcticus ssp. littoralis, with Juncus orthophyllus and Juncus mexicanus important species at lower cover. It is currently known from California.

Common (Translated Scientific) Name: Baltic Rush - (Mexican Rush) Wet Meadow

Colloquial Name: No Data Available

Hierarchy Level: Association

Type Concept: This herbaceous association is known from Yosemite National Park, Death Valley National Park and the Channel Islands in California. The following description is based on occurrences at Yosemite. Additional information will be added as it becomes available. Stands of this association have been found from 1280-2895 m (4200-9500 feet) elevation in seasonally flooded valley bottoms and meadows. Slopes are flat to very gentle, and stands can occur on all aspects. Soils are moderately to poorly drained loams, loamy sand, or clay loams. This seasonally flooded perennial grassland is dominated by Juncus arcticus ssp. littoralis, with Juncus orthophyllus and Juncus mexicanus important species at lower cover. Poa pratensis is also usually present. Forbs are sparse but fairly diverse. Achillea millefolium, Iris missouriensis, and/or Taraxacum officinale (exotic) have the highest frequency, though Mimulus primuloides may be abundant in some stands. Total vegetative cover for this association often exceeds 80%, and the canopy is usually less than 0.5 m in height.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: No Data Available

Similar NVC Types: No Data Available

note: No Data Available

Physiognomy and Structure: No Data Available

Floristics: This seasonally flooded perennial grassland is dominated by Juncus arcticus ssp. littoralis (= Juncus balticus), with Juncus orthophyllus and Juncus mexicanus important species at lower cover. Poa pratensis is also usually present. Forbs are sparse but fairly diverse. Achillea millefolium, Iris missouriensis, and/or Taraxacum officinale (exotic) have the highest frequency, though Mimulus primuloides may be abundant in some stands. Total vegetative cover for this association often exceeds 80%, and the canopy is usually less than 0.5 m in height.

Dynamics: No Data Available

Environmental Description: Stands of this association at Yosemite have been found from 1280-2895 m (4200-9500 feet) elevation in seasonally flooded valley bottoms and meadows. Slopes are flat to very gentle, and stands can occur on all aspects. Soils are moderately to poorly drained loams, loamy sand, or clay loams.

Geographic Range: This herbaceous association is currently known from Yosemite National Park, Death Valley National Park and the Channel Islands in California. Additional range information will be added as it becomes available.

Nations: US

States/Provinces: CA

Plot Analysis Summary: http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.686583

Confidence Level: Low - Poorly Documented

Confidence Level Comments: No Data Available

Grank: GNR

Greasons: No Data Available

Type	Name	Database Code	Classification Code
Class	2 Shrub & Herb Vegetation Class	C02	2
Subclass	2.C Shrub & Herb Wetland Subclass	S44	2.C
Formation	2.C.4 Temperate to Polar Freshwater Marsh, Wet Meadow & Shrubland Formation	F013	2.C.4
Division	2.C.4.Nb Western North American Temperate Freshwater Marsh, Wet Meadow & Shrubland Division	D031	2.C.4.Nb
Macrogroup	2.C.4.Nb.5 Sitka Alder - Booth''s Willow / Northwest Territory Sedge Montane Marsh, Wet Meadow & Shrubland Macrogroup	M893	2.C.4.Nb.5
Group	2.C.4.Nb.5.b Sedge species - Reedgrass species Montane Wet Meadow & Marsh Group	G521	2.C.4.Nb.5.b
Alliance	A1374 Baltic Rush - Mexican Rush Wet Meadow Alliance	A1374	2.C.4.Nb.5.b
Association	CEGL003486 Baltic Rush - (Mexican Rush) Wet Meadow	CEGL003486	2.C.4.Nb.5.b

Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: > Juncus arcticus var. balticus-Carex praegracilis Association (Buck-Diaz et al. 2012)
> Juncus arcticus var. balticus-Lepidium latifolium Provisional Association (Buck-Diaz et al. 2012)
> Juncus arcticus var. balticus (Sawyer et al. 2009) [45.562.07]
> Juncus arcticus var. balticus Association (Buck-Diaz et al. 2012)
> Juncus arcticus var. mexicanus (Sawyer et al. 2009) [45.562.02]
> Juncus arcticus var. mexicanus Association (Buck-Diaz et al. 2012)
= Juncus balticus - (Juncus mexicanus) Association (Rodriguez et al. 2017)
= Juncus balticus - (Juncus mexicanus) Herbaceous Vegetation (Keeler-Wolf 2002)
= Juncus balticus - (Juncus mexicanus) Herbaceous Vegetation (Keeler-Wolf et al. 2012)
> Juncus mexicanus Association (Evens et al. 2014)

Concept Author(s): T. Keeler-Wolf (2002)

Author of Description: T. Keeler-Wolf

Acknowledgements: No Data Available

Version Date: 01-06-17

Buck-Diaz, J., S. Batiuk, and J. M. Evens. 2012. Vegetation alliances and associations of the Great Valley ecoregion, California. California Native Society, Sacramento, CA. [http://cnps.org/cnps/vegetation/pdf/great_valley_eco-vegclass2012.pdf]
Evens, J. M., K. Sikes, D. Hastings, and J. Ratchford. 2014. Vegetation alliance descriptions for Lake Mead National Recreation Area, Death Valley National Park and Mojave National Preserve. Unpublished report submitted to USDI National Park Service, Mojave Desert Network Inventory and Monitoring Program. California Native Plant Society, Sacramento, CA.
Evens, J., A. Klein, J. Taylor, T. Keeler-Wolf, and D. Hickson, principal investigators. 2006. Vegetation classification, descriptions, and mapping of the Clear Creek Management Area, Joaquin Ridge, Monocline Ridge, and Environs in San Benito and western Fresno counties, California. Final report prepared by California Native Plant Society and California Department of Fish and Game, Sacramento, CA. 273 pp.
Evens, J., and S. San. 2006. Vegetation alliances of the San Dieguito River Park region, San Diego County, California. Final report (August 2005) Version 2 (revised May 2006). Prepared by California Native Plant Society in cooperation with the California Natural Heritage Program of the California Department of Fish and Game and San Diego Chapter of the California Native Plant Society. Sacramento, CA. 271 pp.
Keeler-Wolf, T. 2002. Classification of the vegetation of Yosemite National Park and surrounding environs in Tuolumne, Mariposa, Madera and Mono counties, California. NatureServe in cooperation with the California Native Plant Society and California Natural Heritage Program, Wildlife and Habitat Data Analysis Branch, California Department of Fish and Game, Sacramento, CA. August 2002.
Keeler-Wolf, T., M. Schindel, S. San, P. Moore, and D. Hickson. 2003a. Classification of the vegetation of Yosemite National Park and surrounding environs in Tuolumne, Mariposa, Madera and Mono counties, California. Unpublished report by NatureServe in cooperation with the California Native Plant Society and California Department of Fish and Game, Wildlife and Habitat Data Analysis Branch, Sacramento, CA.
Keeler-Wolf, T., P. E. Moore, E. T. Reyes, J. M. Menke, D. N. Johnson, and D. L. Karavidas. 2012. Yosemite National Park vegetation classification and mapping project report. Natural Resource Technical Report NPS/YOSE/NRTR--2012/598. National Park Service, Fort Collins, CO.
Rodriguez, D., K. G. Sikes, T. Keeler-Wolf, G. Kittel, J. Curtis, C. Curley, and J. Evens. 2017. Vegetation classification of Channel Islands National Park. Report to the National Park Service, Fort Collins, CO.
Sawyer, J. O., T. Keeler-Wolf, and J. Evens. 2009. A manual of California vegetation. Second edition. California Native Plant Society, Sacramento CA. 1300 pp.
Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.