Taxon Report

Juncus luciensis Ertter

Santa Lucia dwarf rush

Print Report

Taxon Summary

Juncus luciensis, commonly known as Santa Lucia dwarf rush, is a annual herb in the Juncaceae that is found only in California. It occurs within Chaparral, Great Basin scrub, Lower montane coniferous forest, Meadows and seeps, and Vernal pools, growing at elevations from 300 to 2040 meters. Juncus luciensis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Juncus luciensis Ertter
Common Name:	Santa Lucia dwarf rush
Family:	Juncaceae
Element Code:	PMJUN013J0
USDA Plants Symbol:	JULU2
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Apr-Jul	Apr-Jul
Elevation:	300-2040 (985-6695)
General Habitats:	Chaparral, Great Basin scrub, Lower montane coniferous forest, Meadows and seeps, Vernal pools
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	BLM_S; USFS_S
CRPR Changes:	added to 1B.2 on 2009-04-30

Occurrence Data from the CNDDB


Total Occurrences:	37
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	1
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	36

Location


California Endemic: True
California Counties and Islands: Name (Code)
Lassen (LAS), Modoc (MOD), Monterey (MNT), Napa (NAP), Nevada (NEV), Placer (PLA), Plumas (PLU), Riverside (RIV), San Benito (SBT), San Diego (SDG), San Luis Obispo (SLO), Santa Barbara (SBA), Shasta (SHA)
Quads: Name (Quad Code)
Adelaida (3512067), Bear Canyon (3612113), Big Pine Mtn. (3411966), Buckhorn Lake (4012081), Burnett Peak (3512172), Camatta Ranch (3512043), Cone Peak (3612114), Cosio Knob (3612112), Creston (3512055), Crocker Mtn. (3912084), Cuyamaca Peak (3211685), Detert Reservoir (3812265), Dixie Mountain (3912083), Egg Lake (4112133), Estrella (3512065), Fallbrook (3311743), Ferris Creek (4012013), Frenchman Lake (3912082), Goleta (3411947), Grizzly Valley (3912085), Jacks Backbone (4012166), Janesville (4012035), Jolon (3512182), Julian (3311615), Lake Cachuma (3411958), Martis Peak (3912031), Mount Johnson (3612153), Murrieta (3311752), Norden (3912033), Parkfield (3512084), Paso Robles (3512066), Pikes Point (4012057), Portola (3912074), San Marcos Pass (3411957), Squaw Valley Peak (4012014), Templeton (3512056), Tierra Redonda Mountain (3512078), Wildomar (3311753)

Threat List Data from the CNDDB


Threat List Total:	2
EOs with Threat Listed:	Total EOs	% of EOs
	2	5 %
Agriculture	1	2%
Foot traffic/trampling	1	2%

Notes



Potentially threatened by development.
Threats:

Taxonomy:

Selected References

CRPR List Addition on 2009-04-30

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].