Taxon Details

Micranthes howellii

Howell's saxifrage

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Taxon Summary:

Micranthes howellii, commonly known as Howell's saxifrage, is a perennial rhizomatous herb in the Saxifragaceae that is found in California and elsewhere. It occurs within Cismontane woodland, growing at elevations from 75 to 900 meters. Micranthes howellii is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification

Scientific Name: Micranthes howellii (Greene) Small
Common Name: Howell's saxifrage
Family:	Saxifragaceae
Element Code:	PDSAX0U0T0
USDA Plants Symbol:
Synonyms/Other Names: Saxifraga howellii
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	4.3
Fed List:	None
State List:	None
Global Rank:	G4
State Rank:	S3
Other Status:
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2022-04-05

Ecology and Life History

Lifeform: perennial rhizomatous herb

Blooming Period: Mar-May

Elevation:
75 - 900 meters
245 - 2955 feet

General Habitats:

Cismontane woodland (sometimes serpentinite)

Microhabitat Details:

Microhabitat:

Notes

Notes:
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), Oregon (OR)

California Counties and Islands: Name (Code)
Del Norte (DNT), Humboldt (HUM)

Quads: Name (Quad Code)
Gasquet (4112378), High Plateau Mtn. (4112388), Hurdygurdy Butte (4112377), Shelly Creek Ridge (4112387)

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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Species Account:	Micranthes howellii profile for potential Species of Conservation Concern evaluation (2022)
Other:	USFS Potential Species of Conservation Concern Profile

CNPS Rare Plant Inventory