CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record acanthomintha_duttonii - Tue, Nov. 30, 2021 17:33 ET c
Acanthomintha duttonii
common nameSan Mateo thorn-mint
CalPhotos image
more photos
© 1998 John Game  Follow image link for photo data.
life formannual herb
CA Rare Plant Rank
List 1B.1
LIST 1B: Rare, threatened, or endangered in California and elsewhere.
     0.1: Seriously endangered in California
state rank
S1      ranking system key
global rank
G1     G1: Less than 6 occurrences OR less than 1,000 individuals OR less than 2,000 acres.
Where did the "RED" code go?
CA state listingEndangered  07/79
federal listingEndangered  09/18/85
where found
MAPS - Use v8 link below.

Topographic quads (3):
Palo Alto (428B)* 3712242, Woodside (429A) 3712243, San Mateo (448D)* 3712253
quad data info

Counties, states, regions:
San Mateo (SMT)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Chaparral (Chprl)
•Valley and foothill grassland (VFGrs)/serpentinite
blooming period Apr-Jun  
elevation range50 - 300 meters
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 Madroņo 38(4):278-286 (1991) for revised nomenclature.
full nameAcanthomintha duttonii (Abrams) Jokerst
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  ACDU2 Element Code  PDLAM01040
CalFlora species this taxon    CalFlora genus related taxa
Jepson Online Jepson Interchange  Jepson Manual and other resources
Google search
search Google CNPS website    search Google entire web

Suggested citation: California Native Plant Society (CNPS). 2018. Inventory of Rare and Endangered Plants (online edition, v7-18mar). California Native Plant Society. Sacramento, CA. Accessed on Tue, Nov. 30, 2021 from

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