Taxon Details

Acanthoscyphus parishii var. cienegensis

Cienega Seca oxytheca

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Photo of Acanthoscyphus parishii var. cienegensis

Taxon Summary:

Acanthoscyphus parishii var. cienegensis, commonly known as Cienega Seca oxytheca, is a annual herb in the Polygonaceae that is found only in California. It occurs within Joshua tree "woodland", Pinyon and juniper woodland, Upper montane coniferous forest (granitic, and sandy), growing at elevations from 2105 to 2450 meters. Acanthoscyphus parishii var. cienegensis is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification

Scientific Name: Acanthoscyphus parishii (Parry) Small var. cienegensis (Ertter) Reveal
Common Name: Cienega Seca oxytheca
Family:	Polygonaceae
Element Code:	PDPGN0J042
USDA Plants Symbol:
Synonyms/Other Names: Oxytheca parishii Parry var. cienegensis Ertter
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.3
Fed List:	None
State List:	None
Global Rank:	G4?T2
State Rank:	S2
Other Status:	SB_CalBG/RSABG; USFS_S
CRPR Changes:
Add Date:	1988-01-01
Date Edited:	2025-10-29

Ecology and Life History

Lifeform: annual herb

Blooming Period: (May)Jun-Sep

Elevation:
2105 - 2450 meters
6905 - 8040 feet

General Habitats:

Joshua tree "woodland"
Pinyon and juniper woodland
Upper montane coniferous forest (granitic, sandy)

Microhabitat Details:

Microhabitat:

Notes

Notes: See Brittonia 32: 70-102 (1980) for original description, Harvard Papers in Botany 9(1): 144 (2004) for revised nomenclature, and Phytologia 66(4): 386-387 (1989) for taxonomic treatment.
Threats: Possibly threatened by logging, mining, road maintenance, and vehicles.
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	5
	Total EOs	% of EOs
EOs with Threat Listed:	5	22 %
Recreational use (non-ORV)	2	8%
Road/trail construction/maint.	2	8%
Foot traffic/trampling	1	4%
Mining	1	4%
Other	1	4%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					23
A	B	C	D	X	U
1	3	1	0	0	18

Occurrence Status:
Historical >20 Years	8
Recent <=20 Years	15

Presence:
Presumed Extant	23
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

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

Quads: Name (Quad Code)
Moonridge (3411627), Onyx Peak (3411626), Rattlesnake Canyon (3411636)

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