Taxon Details

Arabis modesta

modest rockcress

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Taxon Summary:

Arabis modesta, commonly known as modest rockcress, is a perennial herb in the Brassicaceae that is found in California and elsewhere. It occurs within Chaparral, and Lower montane coniferous forest, growing at elevations from 120 to 800 meters. Arabis modesta is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification

Scientific Name: Arabis modesta Roll.
Common Name: modest rockcress
Family:	Brassicaceae
Element Code:	PDBRA06180
USDA Plants Symbol:	ARMO
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	4.3
Fed List:	None
State List:	None
Global Rank:	G3
State Rank:	S3
Other Status:
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Mar-Jul

Elevation:
120 - 800 meters
395 - 2625 feet

General Habitats:

Chaparral
Lower montane coniferous forest

Microhabitat Details:

Microhabitat:

Notes

Notes: Intergrades with A. oregana in SIS Co.; may be a variety of that plant. Endangered in OR. See Rhodora 43(511):350-352 (1941) for taxonomic treatment, and Contributions from the Gray Herbarium 204:149-154 (1973) for taxonomic information.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	0
	Total EOs	% of EOs
EOs with Threat Listed:	0	0 %

Occurrence Data from the CNDDB

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

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	0

Presence:
Presumed Extant	0
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA), Oregon (OR)

California Counties and Islands: Name (Code)
Lake (LAK), Napa (NAP), Siskiyou (SIS), Solano (SOL), Trinity (TRI)

Quads: Name (Quad Code)
Dedrick (4012371), Forks of Salmon (4112333), Hamburg (4112371), Hayfork Bally (4012362), Helena (4012372), Horse Creek (4112278), Ironside Mtn. (4012374), Jericho Valley (3812274), Kangaroo Mtn. (4112382), Knoxville (3812273), Monticello Dam (3812251), Mt. George (3812232), Orleans Mtn. (4112334), Preston Peak (4112375), Seiad Valley (4112372), Somes Bar (4112344), Youngs Peak (4112323)

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