CNPS

CNPS Rare Plant Inventory

Species Details

Monardella leucocephala

Merced monardella

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Photo of Monardella leucocephala
© 2020 Hannah Kang 		Photo of Monardella leucocephala
© 2020 Hannah Kang 		Photo of Monardella leucocephala
© 2020 Hannah Kang

  Classification

Scientific Name:
Monardella leucocephala Gray
Common Name:
Merced monardella
Family: Lamiaceae
Element Code: PDLAM180C0
USDA Plants Symbol: MOLE
Synonyms/Other Names:

  Conservation Status

CA Rare Plant Rank: 1A
Fed List: None
State List: None
Global Rank: GX
State Rank:
 SX
Other Status:
CRPR Changes:
Add Date: 1974-01-01
Date Edited: 2024-02-06

  Ecology and Life History

Lifeform: annual herb
Blooming Period: May-Aug
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Elevation:
35 - 100 meters
115 - 330 feet
General Habitats:
  • Valley and foothill grassland (mesic, sandy)
Microhabitat Details:
Microhabitat:

  Notes

Notes:
Last seen in 1941. May have been extirpated by agriculture. Good potential for rediscovery, but field surveys in 1990-1992 and 1997 unsuccessful. See Proceedings of the American Academy of Arts and Sciences 7:385 (1867) for original description, and Annals of the Missouri Botanical Garden 12:90-91 (1925) for taxonomic treatment.
Threats:
Taxonomy:

  Threat List Data from the CNDDB

Threat List Total: 4
Total EOs % of EOs
EOs with Threat Listed: 3 100 %
THREAT LIST:
Agriculture 3 100%
Grazing 1 33%
Mining 1 33%
Recreational use (non-ORV) 1 33%

  Occurrence Data from the CNDDB

Total Occurrences: 3
Element Occurrence Ranks:
A B C D X U
0 0 0 0 3 0
Occurrence Status:
Historical >20 Years 3
Recent <=20 Years 0
Presence:
Presumed Extant 0
Possibly Extirpated 0
Presumed Extirpated 3

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Merced (MER)*, Stanislaus (STA)*
Quads: Name (Quad Code)
Cooperstown (3712065)*, La Grange (3712064)*, Turlock (3712047)*
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

Suggested Citation:
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5). Website https://www.rareplants.cnps.org [accessed 23 November 2024].