Taxon Details

Mentzelia hirsutissima

hairy stickleaf

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Taxon Summary:

Mentzelia hirsutissima, commonly known as hairy stickleaf, is a annual herb in the Loasaceae that is found in California and elsewhere. It occurs within Sonoran desert scrub, growing at elevations from 0 to 700 meters. Mentzelia hirsutissima is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.

Classification

Scientific Name: Mentzelia hirsutissima Wats.
Common Name: hairy stickleaf
Family:	Loasaceae
Element Code:	PDLOA030K0
USDA Plants Symbol:	MEHI3
Synonyms/Other Names: Mentzelia hirsutissima Wats. var. stenophylla (Urb. & Gilg.) Jtn.
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	2B.3
Fed List:	None
State List:	None
Global Rank:	G4?
State Rank:	S3
Other Status:	SB_CalBG/RSABG; SB_USDA
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: annual herb

Blooming Period: Mar-May

Elevation:
0 - 700 meters
0 - 2295 feet

General Habitats:

Sonoran desert scrub (rocky)

Microhabitat Details:

Microhabitat:

Notes

Notes: Possibly threatened by vehicles and foot traffic. See Proc. Am. Acad. 12: 252 (1877) for original description and Annals of the Missouri Botanical Garden 21: 201-202 (1934) for species account.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	6
	Total EOs	% of EOs
EOs with Threat Listed:	5	18 %
ORV activity	4	14%
Foot traffic/trampling	2	7%
Non-native plant impacts	2	7%
Grazing	1	3%
Mining	1	3%
Vandalism/dumping/litter	1	3%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					28
A	B	C	D	X	U
1	2	0	1	0	24

Occurrence Status:
Historical >20 Years	12
Recent <=20 Years	16

Presence:
Presumed Extant	28
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

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

California Counties and Islands: Name (Code)
Imperial (IMP), San Diego (SDG)

Quads: Name (Quad Code)
Agua Caliente Springs (3211683), Arroyo Tapiado (3211682), Borrego Mountain SE (3311611), Borrego Palm Canyon (3311634), Borrego Sink (3311623), Carrizo Mtn. (3211671), Coyote Wells (3211568), Earthquake Valley (3311614), Heber (3211565), In-ko-pah Gorge (3211661), Jacumba (3211662), Mount Signal (3211566), Painted Gorge (3211578), Sombrero Peak (3211673), Sweeney Pass (3211672)

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