Taxon Report

Systenotheca vortriedei (Bdg.) Rev. & Hardham

Vortriede's spineflower

Print Report

Taxon Summary

Systenotheca vortriedei, commonly known as Vortriede's spineflower, is a annual herb in the Polygonaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 500 to 1600 meters. Systenotheca vortriedei is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Systenotheca vortriedei (Bdg.) Rev. & Hardham
Common Name:	Vortriede's spineflower
Family:	Polygonaceae
Element Code:	PDPGN0W010
USDA Plants Symbol:	SYVO
Synonyms/Other Names:	Chorizanthe vortriedei Centrostegia vortriedei (Bdg.) Goodm.

Ecology and Life History


Lifeform:	annual herb
Blooming Period: May-Sep	May-Sep
Elevation:	500-1600 (1640-5250)
General Habitats:	Chaparral, Cismontane woodland
Microhabitat:	Sandy (sometimes), Serpentine (sometimes)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	SB_UCBG
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	0
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	0

Location


California Endemic: True
California Counties and Islands: Name (Code)
Monterey (MNT), San Luis Obispo (SLO)
Quads: Name (Quad Code)
Alder Peak (3512183), Burnett Peak (3512172), Burro Mountain (3512173), Cone Peak (3612114), Lopez Point (3612115), Pebblestone Shut-in (3512161), Tassajara Hot Springs (3612125)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	0 %

Notes



See Great Basin Naturalist Memoirs 2:169-190 (1978) for taxonomic revision, and Phytologia 66(2):83-88 (1989) for revised nomenclature.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 25 October 2025].