CNPS

CNPS Rare Plant Inventory



Taxon Details

Monardella sinuata ssp. nigrescens

northern curly-leaved monardella

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Photo of Monardella sinuata ssp. nigrescens
© 2014 John Doyen 		Photo of Monardella sinuata ssp. nigrescens
© 2014 John Doyen 		Photo of Monardella sinuata ssp. nigrescens
© 2013 Robert Sikora

Taxon Summary:

Monardella sinuata ssp. nigrescens, commonly known as northern curly-leaved monardella, is a annual herb in the Lamiaceae that is found only in California. It occurs within Chaparral (SCR Co.), Coastal dunes, Coastal scrub, Lower montane coniferous forest (SCR Co., and ponderosa pine sandhills), growing at elevations from 0 to 300 meters. Monardella sinuata ssp. nigrescens is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

  Classification

Scientific Name:
Monardella sinuata Elvin & A.C. Sanders ssp. nigrescens Elvin & A.C. Sanders
Common Name:
northern curly-leaved monardella
Family: Lamiaceae
Element Code: PDLAM18162
USDA Plants Symbol:
Synonyms/Other Names:
Name Status: JEF, FNA, POWO,
IPNI, Tropicos

  Conservation Status

CA Rare Plant Rank: 1B.2
Fed List: None
State List: None
Global Rank: G3T2
State Rank:
 S2
Other Status: BLM_S; SB_SBBG
CRPR Changes:
added to 1B.2 on 2013-12-31
Add Date: 2013-12-31
Date Edited: 2024-11-05

  Ecology and Life History

Lifeform: annual herb
Blooming Period: (Apr)May-Jul(Aug-Sep)
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Elevation:
0 - 300 meters
0 - 985 feet
General Habitats:
  • Chaparral (SCR Co.)
  • Coastal dunes
  • Coastal scrub
  • Lower montane coniferous forest (SCR Co., ponderosa pine sandhills)
Microhabitat Details:
Microhabitat:
  • Sandy

  Notes

Notes:
Threatened by non-native plants. Possibly threatened by development, habitat loss, habitat fragmentation, and climate shifts. Previously included in M. undulata. Similar to M. breweri and M. douglasii. See Novon 19(3):315-345 (2009) for original description.
Threats:
Taxonomy:

  Threat List Data from the CNDDB

Threat List Total: 6
Total EOs % of EOs
EOs with Threat Listed: 14 56 %
THREAT LIST:
Non-native plant impacts 10 40%
Grazing 7 28%
Foot traffic/trampling 2 8%
Development 1 4%
ORV activity 1 4%

  Occurrence Data from the CNDDB

Total Occurrences: 25
Element Occurrence Ranks:
A B C D X U
0 7 5 0 1 12
Occurrence Status:
Historical >20 Years 17
Recent <=20 Years 8
Presence:
Presumed Extant 24
Possibly Extirpated 1
Presumed Extirpated 0

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Marin (MRN), Monterey (MNT), San Francisco (SFO), Santa Cruz (SCR)
Quads: Name (Quad Code)
Drakes Bay (3812218), Felton (3712211), Laurel (3712118), Marina (3612167), Monterey (3612158), San Francisco South (3712264)*, Seaside (3612157), Tomales (3812228)
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

  Selected References

CNPS Status Review: CRPR List Addition on 2013-12-31

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Suggested Citation:
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 6 July 2025].
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