Taxon Report

Lilium humboldtii Roezl & Leichtl. ssp. humboldtii

Humboldt lily

Print Report


© 2008 Sierra Pacific Industries

Taxon Summary

Lilium humboldtii ssp. humboldtii, commonly known as Humboldt lily, is a perennial bulbiferous herb in the Liliaceae that is found only in California. It occurs within Chaparral, Cismontane woodland, and Lower montane coniferous forest, growing at elevations from 90 to 1280 meters. Lilium humboldtii ssp. humboldtii is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.

  Classification
Scientific Name:
 Lilium humboldtii Roezl & Leichtl. ssp. humboldtii
Common Name:
 Humboldt lily
Family: Liliaceae
Element Code: PMLIL1A071
USDA Plants Symbol: LIHUH
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial bulbiferous herb
Blooming Period: May-Jul(Aug) May-Jul(Aug)
Elevation: 90-1280 (295-4200)
General Habitats: Chaparral, Cismontane woodland, Lower montane coniferous forest
Microhabitat: Openings
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 4.2
Global Rank: G4T3
State Rank:
 S3
State List: None
Fed List: None
Other Status: SB_UCSC
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:  True
California Counties and Islands: Name (Code)
Amador (AMA), Butte (BUT), Calaveras (CAL), El Dorado (ELD), Los Angeles (LAX), Nevada (NEV), Placer (PLA), Plumas (PLU), San Diego (SDG), Santa Barbara (SBA), Sierra (SIE), Tehama (TEH), Yuba (YUB)
Quads: Name (Quad Code)
Auburn (3812181), Berry Creek (3912164), Butte Meadows (4012115), Camino (3812066), Campbell Mound (3912187), Camptonville (3912141), Cascade (3912162), Challenge (3912142), Chicago Park (3912028), Clipper Mills (3912152), Cohasset (3912186), Colfax (3912018), Devils Nose (3812044), Devils Parade Ground (4012116), Dorrington (3812033), Dutch Flat (3912027), Forbestown (3912153), Fort Mountain (3812034), French Corral (3912132), Garnet Hill (3812043), Georgetown (3812087), Grass Valley (3912121), Lake Combie (3912111), Lompoc Hills (3412054), Nevada City (3912131), North Bloomfield (3912038), Oroville (3912155), Oroville Dam (3912154), Otay Mountain (3211657), Paradise East (3912175), Paradise West (3912176), Pike (3912048), Pilot Hill (3812171), Pine Grove (3812046), Point Conception (3412044), Point Dume (3411817), Pulga (3912174), Rackerby (3912143), Santa Rosa Hills (3412053), Stanislaus (3812023), Stirling City (3912185), Strawberry Valley (3912151), Wolf (3912112)

Threat List Data from the CNDDB

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

Notes
Threats:
Threatened by development, urbanization, horticultural collecting, deer browsing, non-native plants, and road maintenance. Potentially threatened by erosion and logging.
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 9 May 2025].