Taxon Details

Pentachaeta aurea ssp. allenii

Allen's pentachaeta

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Taxon Summary:

Pentachaeta aurea ssp. allenii, commonly known as Allen's pentachaeta, is a annual herb in the Asteraceae that is found only in California. It occurs within Coastal scrub (openings), and Valley and foothill grassland, growing at elevations from 75 to 520 meters. Pentachaeta aurea ssp. allenii is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Pentachaeta aurea Nutt. ssp. allenii Keil
Common Name: Allen's pentachaeta
Family:	Asteraceae
Element Code:	PDAST6X021
USDA Plants Symbol:	PEAUA
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	None
State List:	None
Global Rank:	G4T1
State Rank:	S1
Other Status:
CRPR Changes: added to 1B.1 on 2008-05-08
Add Date:	2008-05-08
Date Edited:	2025-02-04

Ecology and Life History

Lifeform: annual herb

Blooming Period: Mar-Jun

Elevation:
75 - 520 meters
245 - 1705 feet

General Habitats:

Coastal scrub (openings)
Valley and foothill grassland

Microhabitat Details:

Microhabitat:

Notes

Notes: Known from fewer than 20 occurrences in Orange County.
Threats: Threatened by development, habitat alteration, and vehicles. Possibly threatened by non-native plants.
Taxonomy: Not in The Jepson Manual (1993). See Madrono 54(4):343-344 (2007) for original description.

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	2
	Total EOs	% of EOs
EOs with Threat Listed:	1	13 %
ORV activity	1	12%
Other	1	12%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					8
A	B	C	D	X	U
0	0	0	0	1	7

Occurrence Status:
Historical >20 Years	8
Recent <=20 Years	0

Presence:
Presumed Extant	7
Possibly Extirpated	1
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Orange (ORA)

Quads: Name (Quad Code)
Black Star Canyon (3311776), Dana Point (3311746), El Toro (3311766), Laguna Beach (3311757), San Juan Capistrano (3311756), Tustin (3311767)

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