Taxon Report

Panicum acuminatum Sw. var. thermale (Bol.) Wipff

Geysers panicum

Print Report


© Rick York and CNPS

  Classification
Scientific Name:
 Panicum acuminatum Sw. var. thermale (Bol.) Wipff
Common Name:
 Geysers panicum
Family: Poaceae
Element Code: PMPOA24028
USDA Plants Symbol:
Synonyms/Other Names:
  • Panicum thermale Boland.
  • Dichanthelium lanuginosum var. thermale

Ecology and Life History
Lifeform: annual/perennial herb
Blooming Period: Jun-Aug Jun-Aug
Elevation: 305-2470 (1000-8105)
General Habitats: Closed-cone coniferous forest, Riparian forest, Valley and foothill grassland
Microhabitat: Streambanks (sometimes)
Microhabitat Details: geothermally-altered soil

Conservation Status
CA Rare Plant Rank: 1B.2
Global Rank: G5T2Q
State Rank:
 S2
State List: CE
Fed List: None
Other Status: BLM_S; SB_UCSC
CRPR Changes:
  • changed from 1B.1 to 1B.2 on 2012-09-12

Occurrence Data from the CNDDB
Total Occurrences: 11
Element Occurrence Ranks:
   Excellent (A) 1
   Good (B) 3
   Fair (C) 0
   Poor (D) 0
   None (X) 1
   Unknown (U) 6

Location
California Endemic:  True
California Counties and Islands: Name (Code)
Lake (LAK), Plumas (PLU), Shasta (SHA), Sonoma (SON), Tehama (TEH)
Quads: Name (Quad Code)
Lassen Peak (4012145), Reading Peak (4012144), The Geysers (3812277), Whispering Pines (3812276)

Threat List Data from the CNDDB

Threat List Total: 7
EOs with Threat Listed: Total EOs % of EOs
4 36 %
Mining 4 36%
Development 4 36%
Erosion/runoff 4 36%
Non-native plant impacts 3 27%
Other 2 18%
Road/trail construction/maint. 1 9%
Feral pigs 1 9%

Notes
Known only from The Geysers and Lassen Volcanic NP geothermal areas. Does plant occur on Mt. Shasta (SIS Co.)? Plants from Blaney Meadows (FRE Co.) need verification. Threatened by non-native plants. A synonym of Panicum acuminatum var. acuminatum in TJM (1993). See Proceedings of the California Academy of Sciences 2:181 (1862) for original description, Madroño 23(3):151 (1975) for taxonomic treatment, and Proceedings of the CNPS Conservation Conference, pp. 256-263 (2009) for information on population dynamics and monitoring.
Threats:
Taxonomy:

Selected References

CRPR List Change on 2012-09-12
Citation California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 25 December 2024].