CNPS

CNPS Rare Plant Inventory

Species Details

Digitaria californica var. californica

Arizona cottontop

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  Classification

Scientific Name:
Digitaria californica (Benth.) Henrard var. californica
Common Name:
Arizona cottontop
Family: Poaceae
Element Code: PMPOA27051
USDA Plants Symbol:
Synonyms/Other Names:

  Conservation Status

CA Rare Plant Rank: 2B.3
Fed List: None
State List: None
Global Rank: G5T5?
State Rank:
 S2
Other Status:
CRPR Changes:
changed from 2.3 to 2B.3 on 2013-06-12
added to 2.3 on 2006-09-14
Add Date: 2006-09-14
Date Edited: 2022-08-02

  Ecology and Life History

Lifeform: perennial herb
Blooming Period: Jul-Nov
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Elevation:
290 - 1490 meters
950 - 4890 feet
General Habitats:
  • Mojavean desert scrub
  • Sonoran desert scrub
Microhabitat Details:
Microhabitat:
  • Rocky

  Notes

Notes:
See Bot. Voy. Sulph. 55 (1881) for original description and Madrono 52(4): 271 (2005) for information on the first record in CA.
Threats:
Taxonomy:

  Threat List Data from the CNDDB

Threat List Total: 2
Total EOs % of EOs
EOs with Threat Listed: 1 33 %
THREAT LIST:
Improper burning regime 1 33%
Recreational use (non-ORV) 1 33%

  Occurrence Data from the CNDDB

Total Occurrences: 3
Element Occurrence Ranks:
A B C D X U
0 0 0 0 0 3
Occurrence Status:
Historical >20 Years 2
Recent <=20 Years 1
Presence:
Presumed Extant 3
Possibly Extirpated 0
Presumed Extirpated 0

  Location

California Endemic:
California Island:
States: Name (Code)
Arizona (AZ), Baja California (BA), California (CA), New Mexico (NM), South America (SA), Texas (TX)
California Counties and Islands: Name (Code)
Imperial (IMP), San Bernardino (SBD), San Diego (SDG)
Quads: Name (Quad Code)
Bard (3211475), Earthquake Valley (3311614), Pinto Valley (3511523)
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 23 December 2024].