Species Details

Iris thompsonii

Thompson's iris

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Photo of Iris thompsonii
© 2017 Steve Matson
Photo of Iris thompsonii
© 2018 Dana York
Photo of Iris thompsonii
© 2017 Steve Matson
Scientific Name:
Iris thompsonii R.C. Foster
Common Name:
Thompson's iris
Family: Iridaceae
Element Code: PMIRI09120
USDA Plants Symbol:
Synonyms/Other Names:
Lifeform: perennial rhizomatous herb
Blooming Period: (Mar-Apr)May-Jun(Jul-Aug)
Elevation:
90 - 600 meters
295 - 1970 feet
General Habitat:
  • Lower montane coniferous forest
  • North Coast coniferous forest
General Micro Habitat:
Micro Habitat:
  • Edges (often)
  • Mesic (usually)
  • Openings
  • Roadsides (sometimes)
  • Serpentinite (often)
  • Streambanks (sometimes)
Notes:
Threats:
Taxonomy:

Considered to be a hybrid of I. douglasiana and I. innominata in OR.

Other:
Total Occurrences: 0
Element Occurrence Ranks:
A B C D X U
0 0 0 0 0 0
Occurrence Status:
Historical >20 Years 0
Recent <=20 Years 0
Presence:
Presumed Extant 0
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA), Oregon (OR)
California Counties and Islands: Name (Code)
Del Norte (DNT), Siskiyou (SIS)
Quads: Name (Quad Code)
Broken Rib Mtn. (4112386), Cant Hook Mtn. (4112368), Gasquet (4112378), Happy Camp (4112374), Hiouchi (4112471), Hurdygurdy Butte (4112377), Klamath Glen (4112358), Shelly Creek Ridge (4112387)
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.

Map

Presumed Extant
Counties   Quads
CNPS Status Review: Proposed Addition to California Rare Plant Rank 4.3, G3 / S3
Original Description: Rhodora 38(450):199-201 (1936)
Taxonomic Treatment: MadroƱo 37(2):113-123 (1990)
Species Account: Iris thompsonii profile for potential Species of Conservation Concern evaluation (2018)
Other: Aliso 4:1-72 (1958) [Hybrid Taxonomic Treatment]
Other: Journal of Botany 83(12):1623-1629 (1996) [Hybrid Taxonomic Treatment]