Taxon Details

Dissanthelium californicum

California dissanthelium

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Taxon Summary:

Dissanthelium californicum, commonly known as California dissanthelium, is a annual herb in the Poaceae that is found in California and elsewhere. It occurs within Coastal scrub, growing at elevations from 5 to 500 meters. Dissanthelium californicum is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Dissanthelium californicum (Nutt.) Benth.
Common Name: California dissanthelium
Family:	Poaceae
Element Code:	PMPOA29010
USDA Plants Symbol:	DICA5
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G1
State Rank:	S1
Other Status:	SB_CalBG/RSABG
CRPR Changes: added to 1B on 2005-07-08
Add Date:	1974-01-01
Date Edited:	2025-05-06

Ecology and Life History

Lifeform: annual herb

Blooming Period: Mar-May

Elevation:
5 - 500 meters
15 - 1640 feet

General Habitats:

Coastal scrub

Microhabitat Details:

Microhabitat:

Notes

Notes: Rediscovered in March 2005 by Jenny McCune; now known from fewer than ten extant occurrences on SCT Isl. Need quads for historical collections. Threatened by non-native plants. Feral goats may have caused extirpations. Feral animals threats now mostly eradicated on all islands.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	2
	Total EOs	% of EOs
EOs with Threat Listed:	1	14 %
Non-native animal impacts	1	14%
Non-native plant impacts	1	14%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					7
A	B	C	D	X	U
0	0	0	0	0	7

Occurrence Status:
Historical >20 Years	6
Recent <=20 Years	1

Presence:
Presumed Extant	7
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA), Isla Guadalupe, Baja (GU)*

California Counties and Islands: Name (Code)
Los Angeles (LAX)

Quads: Name (Quad Code)
San Clemente Island North (3211885)*, Santa Catalina East (3311833), Santa Catalina North (3311844), Santa Catalina South (3311834)

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

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CNPS Rare Plant Inventory