CNPS

CNPS Rare Plant Inventory



Species Details

Usnea longissima

Methuselah's beard lichen

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Photo of Usnea longissima
© 2021 Scot Loring 		Photo of Usnea longissima
© 2014 Eric B. Peterson 		Photo of Usnea longissima
© 2015 Adrienne Simmons

  Classification

Scientific Name:
Usnea longissima Ach.
Common Name:
Methuselah's beard lichen
Family: Parmeliaceae
Element Code: NLLEC5P420
USDA Plants Symbol: USLO50
Synonyms/Other Names:

  Conservation Status

CA Rare Plant Rank: 4.2
Fed List: None
State List: None
Global Rank: G5
State Rank:
 S4
Other Status:
CRPR Changes:
Add Date: 2014-03-01
Date Edited: 2024-11-05

  Ecology and Life History

Lifeform: fruticose lichen (epiphytic)
Blooming Period:
JFMAMJJASOND
Elevation:
50 - 1460 meters
165 - 4790 feet
General Habitats:
  • Broadleafed upland forest
  • North Coast coniferous forest
Microhabitat Details: On tree branches; usually on old growth hardwoods and conifers
Microhabitat:

  Notes

Notes:
Threatened by development, road maintenance, and logging. See CALS Conservation Committee sponsorship by E. Peterson (2005) for additional information.
Threats:
Taxonomy:

  Threat List Data from the CNDDB

Threat List Total: 6
Total EOs % of EOs
EOs with Threat Listed: 161 78 %
THREAT LIST:
Logging 153 74%
Other 27 13%
Road/trail construction/maint. 25 12%
Recreational use (non-ORV) 2 0%
Agriculture 2 0%

  Occurrence Data from the CNDDB

Total Occurrences: 206
Element Occurrence Ranks:
A B C D X U
14 34 57 47 2 52
Occurrence Status:
Historical >20 Years 206
Recent <=20 Years 0
Presence:
Presumed Extant 204
Possibly Extirpated 1
Presumed Extirpated 1

  Location

California Endemic:
California Island:
States: Name (Code)
Alaska (AK), California (CA), Maine (ME), Michigan (MI), Minnesota (MN), Missouri (MO), Montana (MT), New Hampshire (NH), New York (NY), Oregon (OR), Vermont (VT), Washington (WA), Wisconsin (WI)
California Counties and Islands: Name (Code)
Del Norte (DNT), Humboldt (HUM), Mendocino (MEN), San Mateo (SMT), Santa Cruz (SCR), Sonoma (SON)
Quads: Name (Quad Code)
Ah Pah Ridge (4112348), Annapolis (3812363), Arcata South (4012471), Bailey Ridge (3912324), Bald Hills (4112328), Bear Harbor (3912388), Big Basin (3712222), Blocksburg (4012336), Blue Lake (4012388), Briceland (4012318), Bridgeville (4012347), Buckeye Mtn. (4012432), Bull Creek (4012431), Camp Meeker (3812248), Cant Hook Mtn. (4112368), Cazadero (3812351), Childs Hill (4112461), Cold Spring (3912315), Comptche (3912335), Crannell (4112411), Duncans Mills (3812341), Dutchmans Knoll (3912356), Elk (3912326), Ettersburg (4012328), Eureka Hill (3812385), Fern Canyon (4112441), Ferndale (4012453), Fort Ross (3812352), Fort Seward (4012326), Fortuna (4012452), Garberville (4012317), Gasquet (4112378), Greenough Ridge (3912334), Gualala (3812375), Guerneville (3812258), Hales Grove (3912377), Harris (4012316), High Divide (4112481), Hiouchi (4112471), Honeydew (4012421), Hydesville (4012451), Iaqua Buttes (4012368), Inglenook (3912357), Korbel (4012378), Leggett (3912376), Lincoln Ridge (3912366), Lord-ellis Summit (4012387), Mad River Buttes (4012367), Mallo Pass Creek (3912316), Maple Creek (4012377), Mathison Peak (3912336), McWhinney Creek (4012461), Mendocino (3912337), Mindego Hill (3712232), Miranda (4012327), Mistake Point (3912378), Myers Flat (4012337), Navarro (3912325), Noble Butte (3912386), Northspur (3912345), Noyo Hill (3912346), Orick (4112431), Ornbaun Valley (3812383), Orrs Springs (3912323), Owl Creek (4012358), Panther Creek (4112318), Philo (3912314), Piercy (3912387), Plantation (3812353), Point Arena (3812386), Redcrest (4012348), Requa (4112451), Scotia (4012441), Shelly Creek Ridge (4112387), Shelter Cove (4012411), Sherwood Peak (3912355), Shubrick Peak (4012422), Smith River (4112482), Stewarts Point (3812364), Taylor Peak (4012442), Weott (4012338), Woodside (3712243), Yager Junction (4012357), Yorkville (3812382)
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.
Regional Map

  Map

Presumed Extant
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

Other: USFS Potential Species of Conservation Concern Profile

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Suggested Citation:
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 28 December 2024].
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