Taxon Details

Chorizanthe douglasii

Douglas' spineflower

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Taxon Summary:

Chorizanthe douglasii, commonly known as Douglas' spineflower, is a annual herb in the Polygonaceae that is found only in California. It occurs within Chaparral, Cismontane woodland, Coastal scrub, Lower montane coniferous forest, and Valley and foothill grassland, growing at elevations from 55 to 1600 meters. Chorizanthe douglasii is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification

Scientific Name: Chorizanthe douglasii Benth.
Common Name: Douglas' spineflower
Family:	Polygonaceae
Element Code:	PDPGN040A0
USDA Plants Symbol:	CHDO2
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	4.3
Fed List:	None
State List:	None
Global Rank:	G4
State Rank:	S4
Other Status:	SB_SBBG
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2021-11-05

Ecology and Life History

Lifeform: annual herb

Blooming Period: Apr-Jul

Elevation:
55 - 1600 meters
180 - 5250 feet

General Habitats:

Chaparral
Cismontane woodland
Coastal scrub
Lower montane coniferous forest
Valley and foothill grassland

Microhabitat Details:

Microhabitat:

Gravelly (sometimes)
Sandy (sometimes)

Notes

Notes: Possibly threatened by non-native plants. See Phytologia 66(2):118-120 (1989) for taxonomic treatment.
Threats:
Taxonomy:

Threat List Data from the CNDDB

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

Occurrence Data from the CNDDB

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

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	0

Presence:
Presumed Extant	0
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Monterey (MNT), San Benito (SBT), San Luis Obispo (SLO), Santa Clara (SCL)

Quads: Name (Quad Code)
Alder Peak (3512183), Atascadero (3512046), Bear Canyon (3612113), Bickmore Canyon (3612152), Big Sur (3612137), Burnett Peak (3512172), California Valley (3512031), Camatta Canyon (3512053), Camatta Ranch (3512043), Carmel Valley (3612146), Chews Ridge (3612135), Chualar (3612155), Cone Peak (3612114), Cosio Knob (3612112), Creston (3512055), Estrella (3512065), Greenfield (3612132), Hernandez Reservoir (3612047), Jolon (3512182), Junipero Serra Peak (3612124), La Panza (3512032), La Panza Ranch (3512042), Lime Mountain (3512068), Lopez Mtn. (3512035), Lopez Point (3612115), Marina (3612167), Monterey (3612158), Morgan Hill (3712126), Mount Johnson (3612153), Mt. Carmel (3612147), North Chalone Peak (3612142), Partington Ridge (3612126), Pozo Summit (3512033), Rana Creek (3612145), Salinas (3612166), San Benito (3612151), San Lucas (3612121), San Simeon (3512162), Santa Margarita (3512045), Santa Margarita Lake (3512034), Seaside (3612157), Shedd Canyon (3512054), Soberanes Point (3612148), Spreckels (3612156), Sycamore Flat (3612134), Tassajara Hot Springs (3612125), Thompson Canyon (3612122), Tierra Redonda Mountain (3512078), Topo Valley (3612141), Ventana Cones (3612136), Wilson Corner (3512044)

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