Species Details

Calicium adspersum

spiral-spored gilded-head pin lichen

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Photo by © 2014 Eric B. Peterson  max-height:128px; max-width:145px;
© 2014 Eric B. Peterson
Photo by ©2021 Scot Loring  max-height:128px; max-width:145px;
©2021 Scot Loring
Photo by © 2021 Scot Loring  max-height:128px; max-width:145px;
© 2021 Scot Loring
Scientific Name:
Calicium adspersum Pers.
Common Name:
spiral-spored gilded-head pin lichen
Family: Caliciaceae
Element Code: NLT0005640
USDA Plants Symbol: CAAD4
Synonyms/Other Names:
CA Rare Plant Rank: 2B.2
Fed List: None
State List: None
Global Rank: G3G4
State Rank:
Other Status: USFS_S
CRPR Changes:
added to 2B.2 on 2014-03-01
Add Date: 2014-03-01
Date Edited: 2021-10-08
Lifeform: crustose lichen (epiphytic)
Blooming Period:
200 - 200 meters
655 - 655 feet
General Habitat:
  • Lower montane coniferous forest
  • North Coast coniferous forest
General Micro Habitat: Often restricted to old-growth bark of conifers that are over 200 years in age
Micro Habitat:
Known in CA only from Jedediah Smith Redwoods SP. Historically threatened by logging. Possibly threatened by alteration of fire regimes. Host conifers could include Abies grandis, Pseudotsuga menziesii, Sequoia sempervirens, and Thuja plicata. Similar to C. lenticulare; however, C. adspersum is the only species of Calicium currently known from the Pacific Coast with a yellow pruina. See Bulletin of the California Lichen Society 13(2):51-54 (2006) for CALS Conservation Committee sponsorship.
Total Occurrences: 1
Element Occurrence Ranks:
0 0 0 0 0 1
Occurrence Status:
Historical >20 Years 1
Recent <=20 Years 0
Presumed Extant 1
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA), Oregon (OR), Washington (WA)
California Counties and Islands: Name (Code)
Del Norte (DNT)
Quads: Name (Quad Code)
Crescent City (4112472), Hiouchi (4112471), Sister Rocks (4112462)
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.


Presumed Extant
Counties   Quads