Taxon Report

Tetracoccus dioicus Parry

Parry's tetracoccus

Print Report

Classification


Scientific Name:	Tetracoccus dioicus Parry
Common Name:	Parry's tetracoccus
Family:	Picrodendraceae
Element Code:	PDEUP1C010
USDA Plants Symbol:	TEDI
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial deciduous shrub
Blooming Period: Apr-May	Apr-May
Elevation:	165-1000 (540-3280)
General Habitats:	Chaparral, Coastal scrub
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G2G3
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	BLM_S; SB_CalBG/RSABG; SB_CRES; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	49
Element Occurrence Ranks:
Excellent (A)	4
Good (B)	8
Fair (C)	4
Poor (D)	0
None (X)	1
Unknown (U)	32

Location


California Endemic: False
California Counties and Islands: Name (Code)
Orange (ORA), Riverside (RIV), San Diego (SDG)
Quads: Name (Quad Code)
Alpine (3211677), Barrett Lake (3211666), Bonsall (3311732), Dulzura (3211667), El Cajon Mtn. (3211687), Fallbrook (3311743), Imperial Beach (3211751), Jacumba (3211662), Jamul Mountains (3211668), Morro Hill (3311733), National City (3211761), Otay Mesa (3211658), Otay Mountain (3211657), Pala (3311731), Pechanga (3311741), Potrero (3211655), Ramona (3311617), San Marcos (3311722), San Vicente Reservoir (3211688), Sitton Peak (3311754), Tecate (3211656), Temecula (3311742), Vail Lake (3311648)

Threat List Data from the CNDDB


Threat List Total:	9
EOs with Threat Listed:	Total EOs	% of EOs
	21	43 %
Development	16	32%
Agriculture	4	8%
Non-native plant impacts	3	6%
ORV activity	3	6%
Road/trail construction/maint.	2	4%
Improper burning regime	2	4%
Mining	1	2%
Other	1	2%
Recreational use (non-ORV)	1	2%

Notes



Threatened by agriculture and development. See West American Scientist 1:13 (1885) for original description, and Rhodora 56:50-52 (1954) for taxonomic treatment.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 8 January 2025].