Taxon Report

Usnea longissima Ach.

Methuselah's beard lichen

Print Report

© 2021 Scot Loring

Classification


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

Ecology and Life History


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

Conservation Status


CA Rare Plant Rank:	4.2
Global Rank:	G5
State Rank:	S4
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	changed from 4.3 to 4.2 on 2014-04-08 changed from 4 to 4.3 on 2014-03-21 added to 4 on 2014-03-02

Occurrence Data from the CNDDB


Total Occurrences:	206
Element Occurrence Ranks:
Excellent (A)	14
Good (B)	34
Fair (C)	57
Poor (D)	47
None (X)	2
Unknown (U)	52

Location


California Endemic: False
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)

Threat List Data from the CNDDB


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

Notes



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

Taxonomy:

Selected References

USFS Potential Species of Conservation Concern Profile

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].