Taxon Details

Tetracoccus dioicus

Parry's tetracoccus

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Taxon Summary:

Tetracoccus dioicus, commonly known as Parry's tetracoccus, is a perennial deciduous shrub in the Picrodendraceae that is found in California and elsewhere. It occurs within Chaparral, and Coastal scrub, growing at elevations from 165 to 1000 meters. Tetracoccus dioicus is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Tetracoccus dioicus Parry
Common Name: Parry's tetracoccus
Family:	Picrodendraceae
Element Code:	PDEUP1C010
USDA Plants Symbol:	TEDI
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G2G3
State Rank:	S2
Other Status:	BLM_S; SB_CalBG/RSABG; SB_CRES; USFS_S
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: perennial deciduous shrub

Blooming Period: Apr-May

Elevation:
165 - 1000 meters
540 - 3280 feet

General Habitats:

Chaparral
Coastal scrub

Microhabitat Details:

Microhabitat:

Notes

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:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	9
	Total EOs	% of EOs
EOs with Threat Listed:	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%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					49
A	B	C	D	X	U
4	8	4	0	1	32

Occurrence Status:
Historical >20 Years	33
Recent <=20 Years	16

Presence:
Presumed Extant	48
Possibly Extirpated	1
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
Baja California (BA), California (CA)

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)

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

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CNPS Rare Plant Inventory