Taxon Report

Limnanthes douglasii R. Br. ssp. ornduffii E.G. Buxton

Ornduff's meadowfoam

Print Report

Taxon Summary

Limnanthes douglasii ssp. ornduffii, commonly known as Ornduff's meadowfoam, is a annual herb in the Limnanthaceae that is found only in California. It occurs within Meadows and seeps, growing at elevations from 10 to 20 meters. Limnanthes douglasii ssp. ornduffii is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Limnanthes douglasii R. Br. ssp. ornduffii E.G. Buxton
Common Name:	Ornduff's meadowfoam
Family:	Limnanthaceae
Element Code:	PDLIM02039
USDA Plants Symbol:	LIDOO
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Nov-May	Nov-May
Elevation:	10-20 (35-65)
General Habitats:	Meadows and seeps
Microhabitat:
Microhabitat Details:	Agricultural fields

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G4T1
State Rank:	S1
State List:	None
Fed List:	None
Other Status:	SB_UCSC
CRPR Changes:	added to 1B.1 on 2014-03-18

Occurrence Data from the CNDDB


Total Occurrences:	2
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	1
Unknown (U)	1

Location


California Endemic: True
California Counties and Islands: Name (Code)
San Mateo (SMT)
Quads: Name (Quad Code)
Montara Mountain (3712254)

Threat List Data from the CNDDB


Threat List Total:	3
EOs with Threat Listed:	Total EOs	% of EOs
	1	50 %
Agriculture	1	50%
Disking	1	50%
Non-native plant impacts	1	50%

Notes



Restricted to a single agricultural field in SMT Co. Tetramerous flowers place it with L. macounii from Canada, but molecular data place it within L. douglasii. See Madroño 45(2):184 (1998) for first record of occurrence in CA, Systematic Botany 35(3):552-558 (2010) for molecular phylogeny, and Madroño 60(3):229-235 (2013) for original description.
Threats:

Taxonomy:

Selected References

CRPR List Addition on 2014-03-18

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].