Taxon Details

Hymenoxys odorata

bitter hymenoxys

View Report Copy Link Calflora eFlora CCH CalPhotos iNaturalist

Taxon Summary:

Hymenoxys odorata, commonly known as bitter hymenoxys, is a annual herb in the Asteraceae that is found in California and elsewhere. It occurs within Riparian scrub, and Sonoran desert scrub, growing at elevations from 45 to 150 meters. Hymenoxys odorata is ranked 2B.1, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Hymenoxys odorata DC.
Common Name: bitter hymenoxys
Family:	Asteraceae
Element Code:	PDAST530E0
USDA Plants Symbol:	HYOD
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	2B.1
Fed List:	None
State List:	None
Global Rank:	G5
State Rank:	S2
Other Status:
CRPR Changes: added to 2 on 2008-11-20
Add Date:	2008-11-20
Date Edited:	2022-01-05

Ecology and Life History

Lifeform: annual herb

Blooming Period: Feb-Nov

Elevation:
45 - 150 meters
150 - 490 feet

General Habitats:

Riparian scrub
Sonoran desert scrub

Microhabitat Details:

Microhabitat:

Sandy

Notes

Notes: Most occurrences historical; need field surveys. Threatened by agriculture and development.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	1
	Total EOs	% of EOs
EOs with Threat Listed:	1	17 %
Development	1	16%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					6
A	B	C	D	X	U
0	0	0	0	0	6

Occurrence Status:
Historical >20 Years	5
Recent <=20 Years	1

Presence:
Presumed Extant	6
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
Arizona (AZ), Baja California (BA), California (CA), Colorado (CO), New Mexico (NM), Texas (TX)

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

Quads: Name (Quad Code)
Blythe (3311455), Blythe NE (3311465), Cibola (3311436), Cross Roads (3411422), Gene Wash (3411432), McCoy Wash (3311466), Palo Verde (3311446), Ripley (3311456), Thumb Peak (3311447)

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

CNPS Rare Plant Inventory