CNPS

CNPS Rare Plant Inventory



Taxon Details

Jaffueliobryum raui

Rau's jaffueliobryum moss

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Photo of Jaffueliobryum raui
© 2021 Scot Loring 		Photo of Jaffueliobryum raui
©2021 Scot Loring 		Photo of Jaffueliobryum raui
©2021 Scot Loring

Taxon Summary:

Jaffueliobryum raui, commonly known as Rau's jaffueliobryum moss, is a moss in the Grimmiaceae that is found in California and elsewhere. It occurs within Alpine dwarf scrub, Chaparral, Mojavean desert scrub, and Sonoran desert scrub, growing at elevations from 490 to 2100 meters. Jaffueliobryum raui is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.

  Classification

Scientific Name:
Jaffueliobryum raui (Austin) Thériot
Common Name:
Rau's jaffueliobryum moss
Family: Grimmiaceae
Element Code: NBMUS97010
USDA Plants Symbol: JARA
Synonyms/Other Names:
Name Status: JEF, FNA, POWO,
IPNI, Tropicos

  Conservation Status

CA Rare Plant Rank: 2B.3
Fed List: None
State List: None
Global Rank: G4
State Rank:
 S2
Other Status:
CRPR Changes:
added to 2B.3 on 2014-05-15
Add Date: 2014-05-15
Date Edited: 2022-07-05

  Ecology and Life History

Lifeform: moss
Blooming Period:
JFMAMJJASOND
Elevation:
490 - 2100 meters
1610 - 6890 feet
General Habitats:
  • Alpine dwarf scrub
  • Chaparral
  • Mojavean desert scrub
  • Sonoran desert scrub
Microhabitat Details:
Microhabitat:
  • Carbonate
  • Dry
  • Openings
  • Rock crevices

  Notes

Notes:
Discovered in California by J. A. Harpel in 1980.
Threats:

Potentially threatened by vehicles. Possibly threatened by road or trail construction and maintenance, and mining.
Taxonomy:

Similar to J. wrightii.

  Threat List Data from the CNDDB

Threat List Total: 2
Total EOs % of EOs
EOs with Threat Listed: 1 14 %
THREAT LIST:
ORV activity 1 14%
Road/trail construction/maint. 1 14%

  Occurrence Data from the CNDDB

Total Occurrences: 7
Element Occurrence Ranks:
A B C D X U
0 0 1 0 0 6
Occurrence Status:
Historical >20 Years 5
Recent <=20 Years 2
Presence:
Presumed Extant 7
Possibly Extirpated 0
Presumed Extirpated 0

  Location

California Endemic:
California Island:
States: Name (Code)
Arizona (AZ), California (CA), Colorado (CO), Iowa (IA), Kansas (KS), Minnesota (MN), Montana (MT), Nebraska (NE), Nevada (NV), New Mexico (NM), Oklahoma (OK), South Dakota (SD), Texas (TX), Utah (UT), Wisconsin (WI), Wyoming (WY)
California Counties and Islands: Name (Code)
Inyo (INY), Mendocino (MEN), Riverside (RIV), San Bernardino (SBD), Tehama (TEH)
Quads: Name (Quad Code)
Butterfly Peak (3311655), Clark Lake NE (3311643), Greenwater Canyon (3611625), Horn Spring (3411427), Indian Cove (3411612), Martinez Mtn. (3311653), Mendocino Pass (3912278), Savahia Peak SW (3411436), Vidal Nw (3411426)
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

CNPS Status Review:
Proposed Addition to California Rare Plant Rank 2B.3, G4? / S2?
Taxonomic Treatment: Memoirs of the New York Botanical Garden 45:691-708 (1987)
Species Account: Jaffueliobryum raui profile for potential Species of Conservation Concern evaluation (2018)
Other: USFS Potential Species of Conservation Concern Profile
Other: Madroño 46(4):215 (1999) [CA Discovery Information]

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Suggested Citation:
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 26 January 2025].
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