Taxon Report

Eriodictyon altissimum Wells

Indian Knob mountainbalm

Print Report

Classification


Scientific Name:	Eriodictyon altissimum Wells
Common Name:	Indian Knob mountainbalm
Family:	Namaceae
Element Code:	PDHYD04010
USDA Plants Symbol:	ERAL12
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial evergreen shrub
Blooming Period: Mar-Jun	Mar-Jun
Elevation:	80-270 (260-885)
General Habitats:	Chaparral, Cismontane woodland, Coastal scrub
Microhabitat:	Sandstone
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G1
State Rank:	S1
State List:	CE
Fed List:	FE
Other Status:	SB_CalBG/RSABG; SB_USDA
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	6
Element Occurrence Ranks:
Excellent (A)	1
Good (B)	1
Fair (C)	2
Poor (D)	0
None (X)	1
Unknown (U)	1

Location


California Endemic: True
California Counties and Islands: Name (Code)
San Luis Obispo (SLO)
Quads: Name (Quad Code)
Morro Bay South (3512037), Pismo Beach (3512026)

Threat List Data from the CNDDB


Threat List Total:	8
EOs with Threat Listed:	Total EOs	% of EOs
	5	83 %
Other	2	33%
Recreational use (non-ORV)	2	33%
Road/trail construction/maint.	1	16%
Wood cutting or brush clearing	1	16%
Development	1	16%
Erosion/runoff	1	16%
Foot traffic/trampling	1	16%
Improper burning regime	1	16%

Notes



Known only from the Irish Hills and Indian Knob. Threatened by urbanization, energy development, and vehicles. Possibly threatened by alteration of fire regimes and non-native plants. See Madroño 16(6):184-186 (1962) for original description.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 29 December 2024].