Taxon Report

Centromadia parryi (Greene) Greene ssp. parryi

pappose tarplant

Print Report

Taxon Summary

Centromadia parryi ssp. parryi, commonly known as pappose tarplant, is a annual herb in the Asteraceae that is found only in California. It occurs within Chaparral, Coastal prairie, Marshes and swamps (coastal salt), Meadows and seeps, and Valley and foothill grassland (vernally mesic), growing at elevations from 0 to 420 meters. Centromadia parryi ssp. parryi is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Centromadia parryi (Greene) Greene ssp. parryi
Common Name:	pappose tarplant
Family:	Asteraceae
Element Code:	PDAST4R0P2
USDA Plants Symbol:	CEPAP4
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: May-Nov	May-Nov
Elevation:	0-420 (0-1380)
General Habitats:	Chaparral, Coastal prairie, Marshes and swamps, Meadows and seeps, Valley and foothill grassland
Microhabitat:	Alkaline (often)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G3T2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	BLM_S
CRPR Changes:	added to 1B on 2004-07-27

Occurrence Data from the CNDDB


Total Occurrences:	39
Element Occurrence Ranks:
Excellent (A)	1
Good (B)	6
Fair (C)	2
Poor (D)	4
None (X)	1
Unknown (U)	25

Location


California Endemic: True
California Counties and Islands: Name (Code)
Butte (BUT), Colusa (COL), Glenn (GLE), Lake (LAK), Napa (NAP), San Mateo (SMT), Solano (SOL), Sonoma (SON), Yolo (YOL)
Quads: Name (Quad Code)
Aetna Springs (3812264), Birds Landing (3812127), Calistoga (3812255), Clarksburg (3812145), Cordelia (3812222), Cotati (3812236), Courtland (3812135), Davis (3812156), Denverton (3812128), Elmira (3812138), Fairfield North (3812231), Fairfield South (3812221), Fouts Springs (3912236), Glascock Mtn. (3812283), Healdsburg (3812257), Mark West Springs (3812256), Montara Mountain (3712254), Pennington (3912137), Salt Canyon (3912213), San Francisco South (3712264), Sears Point (3812224), Stonyford (3912245), Wilbur Springs (3912214), Wilson Valley (3812284)

Threat List Data from the CNDDB


Threat List Total:	9
EOs with Threat Listed:	Total EOs	% of EOs
	13	33 %
Development	6	15%
Disking	5	12%
Agriculture	4	10%
Non-native plant impacts	3	7%
Other	3	7%
Foot traffic/trampling	2	5%
Grazing	1	2%
Landfill	1	2%
Road/trail construction/maint.	1	2%

Notes




Threats:
Threatened by agriculture, competition, development, grazing, foot traffic, habitat disturbance, and road maintenance.
Taxonomy:
A synonym of Hemizonia parryi ssp. parryi in TJM (1993).

Selected References

Proposed Addition to CRPR 1B, G4?T1 / S1.2 (2004)

Bulletin of the Torrey Botanical Club 9:16 (1882)

Novon 9:466 (1999)

Profile for potential SCC evaluation (2018)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 5 February 2025].