CNPS Inventory Plant Detail

*The database used to provide updates to the Online Inventory is under construction. View updates and changes made since May 2019 here.

Acanthomintha duttonii

Common Name:	San Mateo thorn-mint
Family:	Lamiaceae
Synonyms:	Acanthomintha obovata ssp. duttonii
Element Code:	PDLAM01040
Full Name:	Acanthomintha duttonii (Abrams) Jokerst
USDA PLANTS Symbol:	ACDU2

2009 Neal Kramer

Biology
Lifeform: annual herb Blooming Period: Apr-Jun Habitat: serpentinite. • Chaparral • Valley and foothill grassland

Rarity Status
California Rare Plant Rank: 1B.1 Rare or endangered in California and elsewhere .1: Seriously endangered in California Federal Listing Status: FE Endangered (09/18/85) State Listing Status: CE Endangered (07/79) State Rank: S1 S1: Critically Imperiled. Global Rank: G1 G1: Critically Imperiled.

Occurrence Data from CDFW
California Natural Diversity Database

Total # of Known Element Occurrences: 5
Element Occurrence Ranks:

A B C D X U

0 1 0 1 2 1

Population Status:

Historic >20 yrs	Recent <=20 yrs
4	1

Presence:

Present Extant	Possibly Extirpated	Presumed Extirpated
3	1	1

Notes

One historical occurrence has been extirpated. Seriously threatened by development, non-native plants, vehicles, and vandalism. USFWS uses the name Acanthomintha obovata ssp. duttonii. See Illustrated Flora of the Pacific States 3:635 (1951) by L. Abrams for original description, and Madroño 38(4):278-286 (1991) 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: 1974-01-01
Last Update: 2011-10-06

Location

Elevation: 50 - 300 meters

California Endemic: yes

Other States:

California Counties and Islands: name (code)
San Mateo (SMT)

Quads: name (DWR code) USGS code
Palo Alto (428B)* 3712242, Woodside (429A) 3712243, San Mateo (448D)* 3712253

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. This data should NOT be substituted for pre-project review or for on-site surveys.

Presumed Extant

Presumed Extirpated or Unknown

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

Suggested Citation
California Native Plant Society, Rare Plant Program. . Inventory of Rare and Endangered Plants of California (online edition, v8-03). Website http://www.rareplants.cnps.org [accessed ].

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