Taxon Details

Delphinium variegatum ssp. thornei

Thorne's royal larkspur

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Taxon Summary:

Delphinium variegatum ssp. thornei, commonly known as Thorne's royal larkspur, is a perennial herb in the Ranunculaceae that is found only in California. It occurs within Cismontane woodland, and Valley and foothill grassland (coastal), growing at elevations from 250 to 575 meters. Delphinium variegatum ssp. thornei is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Delphinium variegatum T. & G. ssp. thornei Munz
Common Name: Thorne's royal larkspur
Family:	Ranunculaceae
Element Code:	PDRAN0B1X2
USDA Plants Symbol:	DEVAT
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	None
State List:	None
Global Rank:	G4T1
State Rank:	S1
Other Status:	SB_CalBG/RSABG
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: perennial herb

Blooming Period: (Mar)Apr-May

Elevation:
250 - 575 meters
820 - 1885 feet

General Habitats:

Cismontane woodland
Valley and foothill grassland (coastal)

Microhabitat Details:

Microhabitat:

Notes

Notes: Known from fewer than ten occurrences. Feral herbivores removed from SCM Isl., and vegetation recovering. May be difficult to distinguish from ssp. kinkiense; see Madroño 47(2):116-126 (2000) for discussion.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	1
	Total EOs	% of EOs
EOs with Threat Listed:	1	7 %
Erosion/runoff	1	6%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					15
A	B	C	D	X	U
0	0	0	0	0	15

Occurrence Status:
Historical >20 Years	8
Recent <=20 Years	7

Presence:
Presumed Extant	15
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Los Angeles (LAX)

Quads: Name (Quad Code)
San Clemente Island Central (3211874), San Clemente Island South (3211873)

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