Species Details

Rhinotropis acanthoclada

thorny milkwort

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Classification

Scientific Name: Rhinotropis acanthoclada (A. Gray) J. R. Abbott
Common Name: thorny milkwort
Family:	Polygalaceae
Element Code:	PDPGL02020
USDA Plants Symbol:	POAC2
Synonyms/Other Names: Polygala acanthoclada Gray

Conservation Status

CA Rare Plant Rank:	2B.3
Fed List:	None
State List:	None
Global Rank:	G4
State Rank:	S2S3
Other Status:
CRPR Changes: changed from 2.3 to 2B.3 on 2013-06-12
Add Date:	2001-01-01
Date Edited:	2024-01-02

Ecology and Life History

Lifeform: perennial shrub

Blooming Period: May-Aug

Elevation:
760 - 2285 meters
2495 - 7495 feet

General Habitats:

Chenopod scrub
Joshua tree "woodland"
Pinyon and juniper woodland

Microhabitat Details:

Microhabitat:

Notes

Notes: See Proceedings of the American Academy of Arts and Sciences 11:73 (1876) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	3
	Total EOs	% of EOs
EOs with Threat Listed:	3	11 %
ORV activity	3	11%
Development	2	7%
Mining	2	7%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					27
A	B	C	D	X	U
0	4	0	0	0	23

Occurrence Status:
Historical >20 Years	7
Recent <=20 Years	20

Presence:
Presumed Extant	27
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
Arizona (AZ), California (CA), Nevada (NV), Utah (UT)

California Counties and Islands: Name (Code)
Riverside (RIV), San Bernardino (SBD)

Quads: Name (Quad Code)
Castle Peaks (3511532), Crescent Peak (3511542), Ivanpah (3511533), Melville Lake (3411645), Mescal Range (3511545), Mineral Hill (3511544), Old Woman Springs (3411646), Pinto Valley (3511523), Porcupine Wash (3311577)

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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Selected References

CNPS Status Review:	Proposed Non-Substantive Name Changes: Multiple taxa in various plant families from the Jepson eFlora revision 11 (2023)
Revised Nomenclature:	Journal of the Botanical Research Institute of Texas 5: 125 – 137. (2011)