Taxon Report

Sedum flavidum (Denton) B. L. Wilson & Zika

pale yellow stonecrop

Print Report


©2012 Julie Kierstead Nelson

Taxon Summary

Sedum flavidum, commonly known as pale yellow stonecrop, is a perennial herb in the Crassulaceae that is found only in California. It occurs within Broadleafed upland forest, Chaparral, Lower montane coniferous forest, and Upper montane coniferous forest, growing at elevations from 355 to 2155 meters. Sedum flavidum is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

  Classification
Scientific Name:
 Sedum flavidum (Denton) B. L. Wilson & Zika
Common Name:
 pale yellow stonecrop
Family: Crassulaceae
Element Code: PDCRA0A0L2
USDA Plants Symbol:
Synonyms/Other Names:
  • Sedum laxum (Britt.) Berger ssp. flavidum Denton

Ecology and Life History
Lifeform: perennial herb
Blooming Period: May-Jul May-Jul
Elevation: 355-2155 (1165-7070)
General Habitats: Broadleafed upland forest, Chaparral, Lower montane coniferous forest, Upper montane coniferous forest
Microhabitat: Openings, Rocky, Serpentine, Talus, Volcanic
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 4.3
Global Rank: G3
State Rank:
 S3
State List: None
Fed List: None
Other Status: SB_CalBG/RSABG
CRPR Changes:

Occurrence Data from the CNDDB
Total Occurrences: 67
Element Occurrence Ranks:
   Excellent (A) 5
   Good (B) 9
   Fair (C) 2
   Poor (D) 0
   None (X) 0
   Unknown (U) 51

Location
California Endemic:  True
California Counties and Islands: Name (Code)
Colusa (COL), Glenn (GLE), Humboldt (HUM), Tehama (TEH), Trinity (TRI)
Quads: Name (Quad Code)
Black Lassic (4012335), Black Rock Mtn. (4012321), Board Camp Mtn. (4012366), Chanchelulla Peak (4012248), Dinsmore (4012345), Dubakella Mtn. (4012342), Forest Glen (4012333), Four Corners Rock (4012312), Fouts Springs (3912236), Grouse Mtn. (4012376), Halfway Ridge (4012353), Hennessy Peak (4012375), Hyampom (4012354), Lord-ellis Summit (4012387), Mad River Buttes (4012367), Naufus Creek (4012343), North Yolla Bolly (4012228), Plaskett Meadows (3912267), Pony Buck Peak (4012331), Sims Mountain (4012365), Smoky Creek (4012332), St. John Mtn. (3912246), Swim Ridge (4012322), Wildwood (4012341), Willow Creek (4012386)

Threat List Data from the CNDDB

Threat List Total: 5
EOs with Threat Listed: Total EOs % of EOs
20 30 %
Logging 10 14%
Road/trail construction/maint. 8 11%
Mining 5 7%
Other 1 1%
Grazing 1 1%

Notes
Possibly threatened by horticultural collecting. Southern populations in Glenn and Colusa counties need more study. See Phytotaxa 368: 1–61 (2018) for taxonomy.
Threats:
Taxonomy:

Selected References

USFS Potential Species of Conservation Concern Profile
Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].