Species Details

Riella americana

American riella

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Scientific Name:
Riella americana M. Howe & Underw.
Common Name:
American riella
Family: Riellaceae
Element Code: NBHEP31020
USDA Plants Symbol: RIAM6
Synonyms/Other Names:
CA Rare Plant Rank: 2B.2
Fed List: None
State List: None
Global Rank: G3
State Rank:
S1
Other Status:
CRPR Changes:
changed from 2.2 to 2B.2 on 2013-06-12
added to 2.2 on 2011-03-23
Add Date: 2011-03-23
Date Edited: 2022-08-02
Lifeform: liverwort (aquatic)
Blooming Period: Aug-Sep
Elevation:
1615 - 1615 meters
5300 - 5300 feet
General Habitat:
  • Lower montane coniferous forest
  • Pinyon and juniper woodland
General Micro Habitat: Arid and semiarid regions as a submerged aquatic in mud flats. In temporary pools and streams. Also in reservoirs and stock ponds.
Micro Habitat:
Notes:
Similar to R. affinis.
Threats:
Taxonomy:
Other:
Total Occurrences: 1
Element Occurrence Ranks:
A B C D X U
0 0 0 0 0 1
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), New Mexico (NM), South Dakota (SD), Texas (TX)
California Counties and Islands: Name (Code)
Modoc (MOD)
Quads: Name (Quad Code)
Big Sage Reservoir (4112056), Mahogany Ridge (4112055)
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.

Map

Presumed Extant
Counties   Quads