Taxon Details

Dithyrea maritima

beach spectaclepod

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Taxon Summary:

Dithyrea maritima, commonly known as beach spectaclepod, is a perennial rhizomatous herb in the Brassicaceae that is found in California and elsewhere. It occurs within Coastal dunes, and Coastal scrub (sandy), growing at elevations from 3 to 50 meters. Dithyrea maritima is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Dithyrea maritima A. Davids.
Common Name: beach spectaclepod
Family:	Brassicaceae
Element Code:	PDBRA10020
USDA Plants Symbol:	DIMA6
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	None
State List:	CT (1990-02-01)
Global Rank:	G1
State Rank:	S1
Other Status:	BLM_S; SB_SBBG
CRPR Changes:
Add Date:	1980-01-01
Date Edited:	2024-11-05

Ecology and Life History

Lifeform: perennial rhizomatous herb

Blooming Period: Mar-May

Elevation:
3 - 50 meters
10 - 165 feet

General Habitats:

Coastal dunes
Coastal scrub (sandy)

Microhabitat Details:

Microhabitat:

Notes

Notes: Extirpated from half of its historical range. Need historical quads for SCT Isl. Last seen in LAX Co. in 1932. Threatened by trampling, vehicles, and non-native plants. See Erythea 2:179 (1894) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	8
	Total EOs	% of EOs
EOs with Threat Listed:	13	46 %
Non-native plant impacts	6	21%
Other	5	17%
Foot traffic/trampling	4	14%
ORV activity	3	10%
Erosion/runoff	2	7%
Feral pigs	1	3%
Mining	1	3%
Recreational use (non-ORV)	1	3%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					28
A	B	C	D	X	U
2	4	0	1	3	18

Occurrence Status:
Historical >20 Years	18
Recent <=20 Years	10

Presence:
Presumed Extant	25
Possibly Extirpated	0
Presumed Extirpated	3

Location

California Endemic:

California Island:

States: Name (Code)
Baja California (BA), California (CA)

California Counties and Islands: Name (Code)
Los Angeles (LAX)*, San Luis Obispo (SLO), Santa Barbara (SBA), Ventura (VEN)

Quads: Name (Quad Code)
Arroyo Grande NE (3512025), Beverly Hills (3411814), Casmalia (3412075), Morro Bay South (3512037), Oceano (3512015), Pismo Beach (3512026), Point Sal (3412086), Redondo Beach (3311874)*, San Miguel Island East (3312083), San Nicolas Island (3311924), Santa Catalina East (3311833), Santa Catalina North (3311844), Santa Catalina South (3311834), Santa Catalina West (3311845), Surf (3412065), Topanga (3411815), Venice (3311884)*

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