Taxon Report

Navarretia leucocephala Benth. ssp. pauciflora (Mason) A.G. Day

few-flowered navarretia

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Taxon Summary

Navarretia leucocephala ssp. pauciflora, commonly known as few-flowered navarretia, is a annual herb in the Polemoniaceae that is found only in California. It occurs within Vernal pools, growing at elevations from 400 to 855 meters. Navarretia leucocephala ssp. pauciflora is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Navarretia leucocephala Benth. ssp. pauciflora (Mason) A.G. Day
Common Name:	few-flowered navarretia
Family:	Polemoniaceae
Element Code:	PDPLM0C0E4
USDA Plants Symbol:	NALEP
Synonyms/Other Names:	Navarretia pauciflora Mason

Ecology and Life History


Lifeform:	annual herb
Blooming Period: May-Jun	May-Jun
Elevation:	400-855 (1310-2805)
General Habitats:	Vernal pools
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G4T1
State Rank:	S1
State List:	CT
Fed List:	FE
Other Status:	SB_CalBG/RSABG
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	10
Element Occurrence Ranks:
Excellent (A)	1
Good (B)	4
Fair (C)	1
Poor (D)	0
None (X)	0
Unknown (U)	4

Location


California Endemic: True
California Counties and Islands: Name (Code)
Lake (LAK), Napa (NAP)
Quads: Name (Quad Code)
Capell Valley (3812242), Clearlake Highlands (3812286), Kelseyville (3812287), Lower Lake (3812285), The Geysers (3812277), Whispering Pines (3812276), Yountville (3812243)

Threat List Data from the CNDDB


Threat List Total:	11
EOs with Threat Listed:	Total EOs	% of EOs
	7	70 %
Grazing	4	40%
Road/trail construction/maint.	3	30%
Recreational use (non-ORV)	2	20%
ORV activity	2	20%
Agriculture	2	20%
Altered flood/tidal/hydrologic regime	2	20%
Development	1	10%
Erosion/runoff	1	10%
Feral pigs	1	10%
Other	1	10%
Non-native plant impacts	1	10%

Notes



Threatened by altered hydrology, erosion, grazing, vehicles, road widening, and recreation. Intergrades rarely with ssp. plieantha. State-listed as N. pauciflora. See Madroño 8(6):200 (1946) for original description, and Novon 3(4):331-340 (1993) for revised nomenclature.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 9 May 2025].