Species Details

Tonestus peirsonii

Peirson's tonestus

View Report Copy Link Calflora eFlora CCH CalPhotos iNaturalist

Species Description:

Tonestus peirsonii, commonly known as Peirson's tonestus, is a perennial herb in the Asteraceae that is found only in California. It occurs within Alpine boulder and rock field, and Subalpine coniferous forest (rocky), growing at elevations from 2900 to 3700 meters. Tonestus peirsonii is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification

Scientific Name: Tonestus peirsonii (Keck) G. Nesom & R. Morgan
Common Name: Peirson's tonestus
Family:	Asteraceae
Element Code:	PDASTE0070
USDA Plants Symbol:	TOPE
Synonyms/Other Names: Haplopappus peirsonii (Keck) J.T. Howell
Name Status:	JEP, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	4.3
Fed List:	None
State List:	None
Global Rank:	G3
State Rank:	S3
Other Status:
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2022-06-08

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Jul-Aug

Elevation:
2900 - 3700 meters
9515 - 12140 feet

General Habitats:

Alpine boulder and rock field
Subalpine coniferous forest (rocky)

Microhabitat Details:

Microhabitat:

Granitic

Notes

Notes: See Madroño 5(5):169 (1940) for original description, and Phytologia 68(3):178 (1990) for revised nomenclature.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	0
	Total EOs	% of EOs
EOs with Threat Listed:	0	0 %

Occurrence Data from the CNDDB

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

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

Presence:
Presumed Extant	0
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Fresno (FRE), Inyo (INY)

Quads: Name (Quad Code)
Mount Tom (3711836), Mt. Darwin (3711826), North Palisade (3711815)

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 Rare Plant Inventory