Taxon 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

Taxon Summary:

Puccinellia howellii, commonly known as Howell's alkali grass, is a perennial herb in the Poaceae that is found only in California. It occurs within Meadows and seeps, growing at elevations from 490 to 490 meters. Puccinellia howellii is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

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