Taxon Details

Juncus acutus ssp. leopoldii

southwestern spiny rush

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Taxon Summary:

Juncus acutus ssp. leopoldii, commonly known as southwestern spiny rush, is a perennial rhizomatous herb in the Juncaceae that is found in California and elsewhere. It occurs within Coastal dunes (mesic), Coastal scrub, Marshes and swamps (coastal salt), and Meadows and seeps (alkaline seeps), growing at elevations from 3 to 900 meters. Juncus acutus ssp. leopoldii is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.

Classification

Scientific Name: Juncus acutus L. ssp. leopoldii (Parl.) Snog.
Common Name: southwestern spiny rush
Family:	Juncaceae
Element Code:	PMJUN01051
USDA Plants Symbol:	JUACL
Synonyms/Other Names: Juncus acutus L. var. sphaerocarpus Engelm.
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	4.2
Fed List:	None
State List:	None
Global Rank:	G5T5
State Rank:	S4
Other Status:	SB_CalBG/RSABG; SB_CRES
CRPR Changes:
Add Date:	1988-01-01
Date Edited:	2022-12-06

Ecology and Life History

Lifeform: perennial rhizomatous herb

Blooming Period: (Mar)May-Jun

Elevation:
3 - 900 meters
10 - 2955 feet

General Habitats:

Coastal dunes (mesic)
Coastal scrub
Meadows and seeps (alkaline seeps)
Marshes and swamps (coastal salt)

Microhabitat Details:

Microhabitat:

Notes

Notes: Threatened by urbanization and flood control.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	0
	Total EOs	% of EOs
EOs with Threat Listed:	0	0 %

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					0
A	B	C	D	X	U
0	0	0	0	0	0

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	0

Presence:
Presumed Extant	0
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
Arizona (AZ), Baja California (BA), California (CA), Georgia (GA), Nevada (NV), South America (SA)

California Counties and Islands: Name (Code)
Imperial (IMP)?, Los Angeles (LAX), Marin (MRN), Orange (ORA), Riverside (RIV), San Diego (SDG), San Luis Obispo (SLO), Santa Barbara (SBA), Ventura (VEN)

Quads: Name (Quad Code)
Agua Caliente Springs (3211683), Alamorio (3211584), Alpine (3211677), Camarillo (3411921), Carpinteria (3411945), Casmalia (3412075), Cayucos (3512048), Chuckwalla Spring (3311542), Dana Point (3311746), Del Mar (3211782), Devils Heart Peak (3411858), Dulzura (3211667), El Cajon (3211678), Encinitas (3311713), Escondido (3311711), Fillmore (3411848), Goleta (3411947), Hildreth Peak (3411955), Imperial Beach (3211751), Imperial Reservoir (3211484), Indio (3311662), In-ko-pah Gorge (3211661), Jamul Mountains (3211668), La Jolla (3211772), La Mesa (3211771), Laguna Beach (3311757), Las Pulgas Canyon (3311734), Long Beach (3311872), Los Alamitos (3311871), Moorpark (3411838), Morro Bay North (3512047), Morro Bay South (3512037), Morro Hill (3311733), Murrieta (3311752), Myoma (3311673), National City (3211761), Newhall (3411845), Newport Beach (3311768), Oceano (3512015), Oceanside (3311724), Ontario (3411716), Otay Mesa (3211658), Otay Mountain (3211657), Oxnard (3411922), Palm Springs (3311675), Palm View Peak (3311665), Pico Creek (3512152), Piru (3411847), Pismo Beach (3512026), Point Loma (3211762), Point Mugu (3411911), Point Sal (3412086), Poway (3211781), Rancho Santa Fe (3311712), Redondo Beach (3311874), Rodriquez Mtn. (3311628), San Clemente (3311745), San Luis Obispo (3512036), San Luis Rey (3311723), San Marcos (3311722), San Rafael (3712285), Santa Barbara (3411946), Santa Catalina East (3311833), Santa Catalina North (3311844), Santa Catalina South (3311834), Santa Catalina West (3311845), Santa Paula (3411931), Seal Beach (3311861), Surf (3412065), Sweeney Pass (3211672), Thermal Canyon (3311661), Topanga (3411815), Torrance (3311873), Triunfo Pass (3411818), Tustin (3311767), Val Verde (3411846), Venice (3311884), Ventura (3411933), Warm Springs Mountain (3411855), Whitaker Peak (3411856)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

Click on quad for name. Hold Shift Key to use mouse scroll wheel

CNPS Rare Plant Inventory