Taxon Details

Amorpha californica var. napensis

Napa false indigo

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Photo of Amorpha californica var. napensis

Taxon Summary:

Amorpha californica var. napensis, commonly known as Napa false indigo, is a perennial deciduous shrub in the Fabaceae that is found only in California. It occurs within Broadleafed upland forest (openings), Chaparral, and Cismontane woodland, growing at elevations from 50 to 2000 meters. Amorpha californica var. napensis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Amorpha californica Nutt. var. napensis Jeps.
Common Name: Napa false indigo
Family:	Fabaceae
Element Code:	PDFAB08012
USDA Plants Symbol:	AMCAN
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:	G4T2
State Rank:	S2
Other Status:	SB_CalBG/RSABG
CRPR Changes:
Add Date:	2001-01-01
Date Edited:	2022-02-01

Ecology and Life History

Lifeform: perennial deciduous shrub

Blooming Period: Apr-Jul

Elevation:
50 - 2000 meters
165 - 6560 feet

General Habitats:

Broadleafed upland forest (openings)
Chaparral
Cismontane woodland

Microhabitat Details:

Microhabitat:

Notes

Notes: Threatened by development and habitat alteration. Potentially threatened by road maintenance. See Manual of the Flowering Plants of California, p. 556 (1925) by W.L. Jepson for original description, and Rhodora 77:348-350 (1975) for taxonomic treatment.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	17
	Total EOs	% of EOs
EOs with Threat Listed:	69	55 %
Road/trail construction/maint.	28	22%
Non-native plant impacts	26	20%
Improper burning regime	19	15%
Other	18	14%
Erosion/runoff	13	10%
Insufficient population/stand size	10	7%
Foot traffic/trampling	9	7%
Development	9	7%
Agriculture	7	5%
Logging	6	4%
Wood cutting or brush clearing	6	4%
Recreational use (non-ORV)	2	1%
Altered flood/tidal/hydrologic regime	1	0%
Biocides	1	0%
Disease	1	0%
Grazing	1	0%
Feral pigs	1	0%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					126
A	B	C	D	X	U
13	36	22	4	1	50

Occurrence Status:
Historical >20 Years	32
Recent <=20 Years	94

Presence:
Presumed Extant	125
Possibly Extirpated	1
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Lake (LAK), Marin (MRN), Napa (NAP), Sonoma (SON)

Quads: Name (Quad Code)
Aetna Springs (3812264), Bodega Head (3812331), Bolinas (3712286), Calistoga (3812255), Camp Meeker (3812248), Cazadero (3812351), Cotati (3812236), Detert Reservoir (3812265), Duncans Mills (3812341), Fort Ross (3812352), Glen Ellen (3812235), Guerneville (3812258), Healdsburg (3812257), Kenwood (3812245), Mark West Springs (3812256), Novato (3812215), Petaluma (3812226), Petaluma River (3812225), Rutherford (3812244), San Geronimo (3812216), San Quentin (3712284), San Rafael (3712285), Santa Rosa (3812246), Sonoma (3812234), St. Helena (3812254)

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

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CNPS Rare Plant Inventory