Species Details

Catabrosa aquatica

water whorlgrass

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Scientific Name:
Catabrosa aquatica (L.) P. Beauv.
Common Name:
water whorlgrass
Family: Poaceae
Element Code: PMPOA19010
USDA Plants Symbol:
Synonyms/Other Names:
Lifeform: perennial stoloniferous herb
Blooming Period: Jul-Sep
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Elevation:
- meters
- feet
General Habitats:
  • Meadows and seeps
Microhabitat Details: Sometimes stoloniferous or rhizomatous.
Microhabitat:
  • Streambanks
Notes:
Discovered in CA by Marla Knight in 2007.  Similar to Torreyochloa pallida var. pauciflora; differs in having leaf sheaths closed at least part of the way, vs. leaf sheaths open (with overlapping margins) to the base in T. pallidaSee Species Plantarum 1: 64 (1753) for original description, and Essai d'une Nouvelle Agrostographie 97 (1812) for revised nomenclature.
Threats:
Possibly threatened by grazing, trampling, vehicles, and recreational activities.
Taxonomy:
Threat List Total: 3
Total EOs % of EOs
EOs with Threat Listed: 1 100 %
THREAT LIST:
Foot traffic/trampling 1 100%
Grazing 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)
Alaska (AK), Arizona (AZ), California (CA), Colorado (CO), Idaho (ID), Iowa (IA), Montana (MT), Nebraska (NE), Nevada (NV), New Mexico (NM), North Dakota (ND), Oregon (OR), South America (SA), South Dakota (SD), Utah (UT), Washington (WA), Wisconsin (WI), Wyoming (WY)
California Counties and Islands: Name (Code)
Siskiyou (SIS)
Quads: Name (Quad Code)
Panther Rock (4112272)
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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