Taxon Report

Ivesia baileyi Wats. var. baileyi

Bailey's ivesia

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Taxon Summary

Ivesia baileyi var. baileyi, commonly known as Bailey's ivesia, is a perennial herb in the Rosaceae that is found in California and elsewhere. It occurs within Great Basin scrub, and Lower montane coniferous forest, growing at elevations from 1340 to 2600 meters. Ivesia baileyi var. baileyi is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Ivesia baileyi Wats. var. baileyi
Common Name:	Bailey's ivesia
Family:	Rosaceae
Element Code:	PDROS0X031
USDA Plants Symbol:	IVBAB
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: May-Aug	May-Aug
Elevation:	1340-2600 (4395-8530)
General Habitats:	Great Basin scrub, Lower montane coniferous forest
Microhabitat:	Rocky, Volcanic
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.3
Global Rank:	G5T4
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	SB_UCSC
CRPR Changes:	changed from 2.3 to 2B.3 on 2013-06-12

Occurrence Data from the CNDDB


Total Occurrences:	14
Element Occurrence Ranks:
Excellent (A)	5
Good (B)	2
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	7

Location


California Endemic: False
California Counties and Islands: Name (Code)
Lassen (LAS), Plumas (PLU)
Quads: Name (Quad Code)
Beckwourth Pass (3912071), Dixie Mountain (3912083), Doyle (4012011), Frenchman Lake (3912082), Little Mud Flat (4012042), Wendel (4012032)

Threat List Data from the CNDDB


Threat List Total:	2
EOs with Threat Listed:	Total EOs	% of EOs
	2	14 %
Logging	1	7%
Other	1	7%

Notes



See Madroño 32(2):123 (1985) for discussion of CA occurrences.
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 20 October 2025].