CNPS

CNPS Rare Plant Inventory

Species Details

Puccinellia howellii

Howell's alkali grass

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Photo of Puccinellia howellii
©1991 Dean Wm. Taylor 		Photo of Puccinellia howellii
©2011 Steve Matson 		Photo of Puccinellia howellii
©2011 Steve Matson

  Classification

Scientific Name:
Puccinellia howellii Davis
Common Name:
Howell's alkali grass
Family: Poaceae
Element Code: PMPOA531A0
USDA Plants Symbol: PUHO
Synonyms/Other Names:

  Conservation Status

CA Rare Plant Rank: 1B.1
Fed List: None
State List: None
Global Rank: G1
State Rank:
 S1
Other Status: BLM_S; SB_BerrySB
CRPR Changes:
Add Date: 1994-01-01
Date Edited: 2024-11-05

  Ecology and Life History

Lifeform: perennial herb
Blooming Period: Apr-Jun
JFMAMJJASOND
Elevation:
490 - 490 meters
1610 - 1610 feet
General Habitats:
  • Meadows and seeps (mineralized)
Microhabitat Details:
Microhabitat:

  Notes

Notes:
Known from only one occurrence near Whiskeytown. Threatened by highway runoff pollution. See Madroño 37(1):55-58 (1990) for original description, 40(4):202-208 (1993) for confirmation of species validity, and 49(3):178-185 (2002) for ecological information.
Threats:
Taxonomy:

  Threat List Data from the CNDDB

Threat List Total: 9
Total EOs % of EOs
EOs with Threat Listed: 1 100 %
THREAT LIST:
Altered flood/tidal/hydrologic regime 1 100%
Foot traffic/trampling 1 100%
Mining 1 100%
Non-native plant impacts 1 100%
ORV activity 1 100%

  Occurrence Data from the CNDDB

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

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Shasta (SHA)
Quads: Name (Quad Code)
French Gulch (4012266)
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

Suggested Citation:
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5). Website https://www.rareplants.cnps.org [accessed 15 November 2024].