Taxon Report

Senecio aphanactis Greene

chaparral ragwort

This taxon is in review.

Print Report

Neal Kramer

Classification


Scientific Name:	Senecio aphanactis Greene
Common Name:	chaparral ragwort
Family:	Asteraceae
Element Code:	PDAST8H060
USDA Plants Symbol:	SEAP2
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Jan-Apr(May)	Jan-Apr(May)
Elevation:	15-800 (50-2625)
General Habitats:	Chaparral, Cismontane woodland, Coastal scrub
Microhabitat:	Alkaline (sometimes)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.2
Global Rank:	G3
State Rank:	S2
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	changed from 2.2 to 2B.2 on 2013-06-12

Occurrence Data from the CNDDB


Total Occurrences:	98
Element Occurrence Ranks:
Excellent (A)	12
Good (B)	6
Fair (C)	2
Poor (D)	0
None (X)	5
Unknown (U)	73

Location


California Endemic: False
California Counties and Islands: Name (Code)
Alameda (ALA), Contra Costa (CCA), Fresno (FRE), Los Angeles (LAX), Merced (MER), Monterey (MNT), Orange (ORA), Riverside (RIV), San Benito (SBT), San Bernardino (SBD), San Diego (SDG), San Francisco (SFO), San Luis Obispo (SLO), San Mateo (SMT), Santa Barbara (SBA), Santa Clara (SCL), Santa Cruz (SCR), Solano (SOL), Tulare (TUL), Ventura (VEN)
Quads: Name (Quad Code)
Antioch South (3712187), Arroyo Grande NE (3512025), Benicia (3812212), Bickmore Canyon (3612152), Burnett Peak (3512172), Byron Hot Springs (3712176), Camarillo (3411921), Camatta Ranch (3512043), Cambria (3512151), Cerro Colorado (3612068), Chounet Ranch (3612066), Ciervo Mtn. (3612045), Clayton (3712188), Cypress Mountain (3512058), Dana Point (3311746), Davenport (3712212), Del Mar (3211782), El Toro (3311766), Felton (3712211), Fontana (3411714), Glendora (3411727), Imperial Beach (3211751), Jacumba (3211662), Jamul Mountains (3211668), Jolon (3512182), Kreyenhagen Hills (3612013), La Jolla (3211772), La Mesa (3211771), Laguna Seca Ranch (3612077), Las Pulgas Canyon (3311734), Lillis Ranch (3612044), Lompoc (3412064), Lompoc Hills (3412054), Lopez Mtn. (3512035), Mare Island (3812213), Mercey Hot Springs (3612067), Midway (3712165), Mindego Hill (3712232), Monocline Ridge (3612055), Morro Bay North (3512047), Morro Bay South (3512037), National City (3211761), Newark (3712251), Newbury Park (3411828), Newhall (3411845), North Chalone Peak (3612142), Oceanside (3311724), Ortigalita Peak NW (3612088), Otay Mesa (3211658), Panoche (3612057), Panorama Hills (3511926), Pechanga (3311741), Pismo Beach (3512026), Point Conception (3412044), Point Loma (3211762), Port San Luis (3512027), Poway (3211781), Riverside East (3311783), Sacate (3412043), San Bernardino South (3411713), San Clemente (3311745), San Dimas (3411717), San Francisco South (3712264), San Jose East (3712137), San Luis Obispo (3512036), San Mateo (3712253), Santa Catalina East (3311833), Santa Cruz Island A (3311987), Santa Cruz Island B (3311986), Santa Rosa Island North (3312081), Santa Ynez (3412051), Shedd Canyon (3512054), Success Dam (3611818), Thousand Oaks (3411827), Topo Valley (3612141), Tranquillon Mtn. (3412055), Triunfo Pass (3411818), Tumey Hills (3612056), Tustin (3311767), Wilson Corner (3512044), Woodside (3712243)

Threat List Data from the CNDDB


Threat List Total:	13
EOs with Threat Listed:	Total EOs	% of EOs
	12	12 %
ORV activity	5	5%
Development	4	4%
Non-native plant impacts	3	3%
Grazing	2	2%
Improper burning regime	1	1%
Military operations	1	1%
Erosion/runoff	1	1%
Feral pigs	1	1%
Foot traffic/trampling	1	1%
Other	1	1%
Recreational use (non-ORV)	1	1%
Road/trail construction/maint.	1	1%
Wood cutting or brush clearing	1	1%

Notes



Threatened by development. Rare in LAX, ORA, and RIV counties. Need quads for RIV Co. and SCT Isl. Not seen on SCZ Isl. between 1934 and 1991. See Pittonia 1:220 (1888) for original description, and North American Flora II 10:50-139 (1978) for taxonomic treatment.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 December 2024].