Taxon Report

Iris bracteata Wats.

Siskiyou iris

Print Report

Taxon Summary

Iris bracteata, commonly known as Siskiyou iris, is a perennial rhizomatous herb in the Iridaceae that is found in California and elsewhere. It occurs within Broadleafed upland forest, and Lower montane coniferous forest, growing at elevations from 180 to 1070 meters. Iris bracteata is ranked 3.3, Plants About Which We Need More Information, A Review List; Not very threatened in California.

Classification


Scientific Name:	Iris bracteata Wats.
Common Name:	Siskiyou iris
Family:	Iridaceae
Element Code:	PMIRI09020
USDA Plants Symbol:	IRBR
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial rhizomatous herb
Blooming Period: May-Jun	May-Jun
Elevation:	180-1070 (590-3510)
General Habitats:	Broadleafed upland forest, Lower montane coniferous forest
Microhabitat:	Serpentine
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	3.3
Global Rank:	G3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


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

Location


California Endemic: False
California Counties and Islands: Name (Code)
Del Norte (DNT), Shasta (SHA), Siskiyou (SIS), Trinity (TRI)
Quads: Name (Quad Code)
Broken Rib Mtn. (4112386), Gasquet (4112378), High Plateau Mtn. (4112388), Hurdygurdy Butte (4112377), Polar Bear Mtn. (4112385), Scott Mountain (4112236), Shasta Dam (4012264), Shelly Creek Ridge (4112387), Smith River (4112482)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	0 %

Notes



Move to List 4? Need locality and abundance information.
Threats:

Taxonomy:
Hybridizes with other Iris spp.

Selected References

Proceedings of the American Academy of Arts and Sciences 20:375 (1885)

Iris bracteata profile for potential Species of Conservation Concern evaluation (2018)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 16 November 2025].