CNPS Inventory Plant Detail

Sidotheca emarginata

Common Name:	white-margined oxytheca
Family:	Polygonaceae
Synonyms:	Oxytheca emarginata
Element Code:	PDPGN0J030
Full Name:	Sidotheca emarginata (H.M. Hall) Reveal
USDA PLANTS Symbol:

Biology
Lifeform: annual herb Blooming Period: February - August Habitat: • Chaparral • Lower montane coniferous forest • Pinyon and juniper woodland

Rarity Status
CA Rare Plant Rank: 1B.3 Rare, threatened, or endangered in California and elsewhere .3: Not very endangered in California Federal Listing Status: Not Listed State Listing Status: Not Listed State Rank: S2.3 S2: Imperiled. .3: No current threats known. Global Rank: G2 G2: Imperiled.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 21
Element Occurrence Ranks:

A B C D X U

0 1 0 0 0 20

Population Status:

Historic >20 yrs	Recent <=20 yrs
7	14

Presence:

Present Extant	Possibly Extirpated	Extirpated
21	0	0

Notes

Threatened by development, grazing, recreational activities, and trampling. See University of California Publications in Botany 1: 75 (1902) for original description, Harvard Papers in Botany 9(1): 211 (2004) for revised nomenclature, and Phytologia 66(4): 388 (1989) for taxonomic treatment.
To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
Date Added: 1980-01-01
Last Update: 2010-03-15

Location

Elevation: 1200 - 2500 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Riverside (RIV)

Quads: name (DWR code) USGS code
Toro Peak (065C) 33116E4, Palm View Peak (066A) 33116F5, Idyllwild (066B) 33116F6, Butterfly Peak (066D) 33116E5, San Jacinto Peak (083C) 33116G6, Palm Springs (083D) 33116G5, Old Woman Springs (130B) 34116D6

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

1209

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora CalPhotos Consortium of California Herbaria California Department of Fish and Game: CNDDB Quick Viewer

Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .

-116.5,33.75