Taxon Details

Pedicularis rigginsiae

Arroyo de la Cruz lousewort

View Report Copy Link Calflora eFlora CCH CalPhotos iNaturalist

Taxon Summary:

Pedicularis rigginsiae, commonly known as Arroyo de la Cruz lousewort, is a perennial herb (hemiparasitic) in the Orobanchaceae that is found only in California. It occurs within Chaparral, growing at elevations from 100 to 155 meters. Pedicularis rigginsiae is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Pedicularis rigginsiae D.J. Keil
Common Name: Arroyo de la Cruz lousewort
Family:	Orobanchaceae
Element Code:	PDSCR1K170
USDA Plants Symbol:
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:	G1
State Rank:	S1
Other Status:
CRPR Changes: added to 1B.1 on 2021-02-17
Add Date:	2021-02-17
Date Edited:	2022-12-06

Ecology and Life History

Lifeform: perennial herb (hemiparasitic)

Blooming Period: Jan-May

Elevation:
100 - 155 meters
330 - 510 feet

General Habitats:

Chaparral (maritime)

Microhabitat Details: Ultramafic (highly weathered)

Microhabitat:

Clay

Notes

Notes:
Threats: Threatened by low population numbers. Potentially threatened by ranching activities and development.
Taxonomy: Previously included in Pedicularis dudleyi.

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	1
	Total EOs	% of EOs
EOs with Threat Listed:	1	33 %
Wood cutting or brush clearing	1	33%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					3
A	B	C	D	X	U
0	1	0	0	0	2

Occurrence Status:
Historical >20 Years	3
Recent <=20 Years	0

Presence:
Presumed Extant	3
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
San Luis Obispo (SLO)

Quads: Name (Quad Code)
Piedras Blancas (3512163), San Simeon (3512162)

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

Click on quad for name. Hold Shift Key to use mouse scroll wheel

CNPS Status Review:	CRPR List Addition on 2021-02-17
Original Description:	Phytoneuron 2019-2: 1–8 (2019)

CNPS Rare Plant Inventory