Taxon Report

Polemonium pulcherrimum Hook. var. shastense (Eastw.) Stubbs

Mt. Shasta sky pilot

Print Report


©2015 Neal Kramer

  Classification
Scientific Name:
 Polemonium pulcherrimum Hook. var. shastense (Eastw.) Stubbs
Common Name:
 Mt. Shasta sky pilot
Family: Polemoniaceae
Element Code: PDPLM0E0J4
USDA Plants Symbol: POPUS
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial herb
Blooming Period: Jun-Sep Jun-Sep
Elevation: 2175-3900 (7135-12795)
General Habitats: Alpine boulder and rock field, Subalpine coniferous forest, Upper montane coniferous forest
Microhabitat: Volcanic (sometimes)
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 1B.2
Global Rank: G5T2
State Rank:
 S2
State List: None
Fed List: None
Other Status:
CRPR Changes:
  • added to 1B.2 on 2014-11-17

Occurrence Data from the CNDDB
Total Occurrences: 14
Element Occurrence Ranks:
   Excellent (A) 1
   Good (B) 0
   Fair (C) 0
   Poor (D) 0
   None (X) 0
   Unknown (U) 13

Location
California Endemic:  True
California Counties and Islands: Name (Code)
Shasta (SHA), Siskiyou (SIS)
Quads: Name (Quad Code)
Callahan (4112237), Hotlum (4112243), Lassen Peak (4012145), McCloud (4112232), Mt. Shasta (4112242), Rainbow Mtn. (4112148), Thousand Lakes Valley (4012165)

Threat List Data from the CNDDB

Threat List Total: 2
EOs with Threat Listed: Total EOs % of EOs
4 29 %
Foot traffic/trampling 4 28%
Road/trail construction/maint. 1 7%

Notes
Threats:
Threatened by foot traffic.
Taxonomy:

Selected References

Proposed Addition to California Rare Plant Rank 1B.2, G5T2 / S2
Bulletin of the Torrey Botanical Club 32(4):205-206 (1905)
Madroño 60(3):243-248 (2013)
Polemonium pulcherrimum var. shastense profile for potential Species of Conservation Concern evaluation (2022)
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 5 January 2025].