CNPS Inventory Plant Detail

Centromadia parryi ssp. congdonii

Common Name:	Congdon's tarplant
Family:	Asteraceae
Synonyms:	Hemizonia parryi ssp. congdonii
Element Code:	PDAST4R0P1
Full Name:	Centromadia parryi (Greene) Greene ssp. congdonii (Rob. & Greenm.) B.G. Baldwin
USDA PLANTS Symbol:	CEPAC

Biology
Lifeform: annual herb Blooming Period: May - November Habitat: • Valley and foothill grassland (alkaline)

Rarity Status
Rare Plant Rank: 1B.1 Rare, threatened, or endangered in California and elsewhere .1: Seriously endangered in California Federal Listing Status: Not Listed State Listing Status: Not Listed State Rank: S2 S2: Imperiled. Global Rank: G4T2 T2: Imperiled. G4: (species) Apparently secure, considering populations outside California.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 91
Element Occurrence Ranks:

A B C D X U

10 18 25 15 15 8

Population Status:

Historic >20 yrs	Recent <=20 yrs
17	74

Presence:

Present Extant	Possibly Extirpated	Extirpated
76	6	9

Notes

Severely threatened by development. Possibly threatened by grazing and non-native plants. A synonym of Hemizonia parryi ssp. congdonii in TJM (1993). See Botanical Gazette 22:169 (1896) for original description, and Novon 9:462-471 (1999) for revised nomenclature.
To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
Date Added: 1994-01-01
Last Update: 2012-11-05

Location

Elevation: 0 - 230 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Alameda (ALA), Contra Costa (CCA), Monterey (MNT), Santa Clara (SCL), Santa Cruz (SCR) *, San Luis Obispo (SLO), San Mateo (SMT), Solano (SOL) *

Quads: name (DWR code) USGS code
Arroyo Grande NE (221A) 35120B5, Pismo Beach (221B) 35120B6, San Luis Obispo (246C) 35120C6, Soledad (342A)? 36121D3, Palo Escrito Peak (342B)* 36121D4, Gonzales (364C) 36121E4, Natividad (365A) 36121F5, Salinas (365B) 36121F6, Spreckels (365C) 36121E6, Chualar (365D) 36121E5, Seaside (366D) 36121E7, Watsonville East (386B)* 36121H6, Prunedale (386C)(*?) 36121G6, Watsonville West (387A) 36121H7, Moss Landing (387D) 36121G7, Milpitas (427B) 37121D8, San Jose East (427D)* 37121C7, Mountain View (428A) 37122D1, Palo Alto (428B) 37122D2, Altamont (445B) 37121F6, Livermore (446A) 37121F7, Dublin (446B) 37121F8, Niles (446C) 37121E8, La Costa Valley (446D) 37121E7, Hayward (447A)* 37122F1, San Leandro (447B)* 37122F2, Newark (447D) 37122E1, Brentwood (463B) 37121H6, Byron Hot Springs (463C) 37121G6, Diablo (464C) 37121G8, Tassajara (464D) 37121G7, Walnut Creek (465A)* 37122H1, Denverton (481B) 38121B8, Benicia (482C)* 38122A2, Vine Hill (482D) 38122A1

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

1689

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora CalPhotos Consortium of California Herbaria California Department of Fish and Wildlife: CNDDB Quick Viewer

Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-02). California Native Plant Society. Sacramento, CA. Accessed on .

-121.625,36.875