Taxon Report

Leptosiphon ambiguus (Rattan) J.M. Porter & L.A. Johnson

serpentine leptosiphon

Print Report

© 2010 Aaron Schusteff

Classification


Scientific Name:	Leptosiphon ambiguus (Rattan) J.M. Porter & L.A. Johnson
Common Name:	serpentine leptosiphon
Family:	Polemoniaceae
Element Code:	PDPLM09020
USDA Plants Symbol:	LEAM13
Synonyms/Other Names:	Linanthus ambiguus (Rattan) Greene

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Mar-Jun	Mar-Jun
Elevation:	120-1130 (395-3710)
General Habitats:	Cismontane woodland, Coastal scrub, Valley and foothill grassland
Microhabitat:	Serpentine (usually)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.2
Global Rank:	G4
State Rank:	S4
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)
Alameda (ALA), Butte (BUT), Contra Costa (CCA), El Dorado (ELD), Fresno (FRE), Merced (MER), Monterey (MNT), San Benito (SBT), San Joaquin (SJQ), San Mateo (SMT), Santa Clara (SCL), Santa Cruz (SCR), Sonoma (SON), Stanislaus (STA)
Quads: Name (Quad Code)
Altamont (3712166), Big Basin (3712222), Calaveras Reservoir (3712147), Cedar Mtn. (3712155), Cerro Colorado (3612068), Cherry Peak (3612162), Chittenden (3612185), Clayton (3712188), Copper Mtn. (3712143), Cupertino (3712231), Dublin (3712168), Eylar Mtn. (3712145), Gilroy (3712115), Hamlin Canyon (3912166), Hepsedam Peak (3612037), Hernandez Reservoir (3612047), Idria (3612046), Isabel Valley (3712135), La Costa Valley (3712157), Lick Observatory (3712136), Livermore (3712167), Llanada (3612058), Loma Prieta (3712117), Lone Tree Creek (3712154), Los Banos (3712017), Los Banos Valley (3612181), Los Gatos (3712128), Mendenhall Springs (3712156), Mercey Hot Springs (3612067), Morgan Hill (3712126), Mt. Boardman (3712144), Mt. Day (3712146), Mt. Madonna (3712116), Mt. Sizer (3712125), Mt. Stakes (3712134), North Chalone Peak (3612142), Ortigalita Peak (3612078), Pacheco Pass (3712112), Paicines (3612163), Palo Alto (3712242), Panoche (3612057), Panoche Pass (3612161), Paradise East (3912175), Patterson (3712142), Pilot Hill (3812171), San Benito Mtn. (3612036), San Francisco South (3712264), San Jose East (3712137), San Jose West (3712138), San Luis Dam (3712111), San Luis Ranch (3712027), San Mateo (3712253), Santa Rita Peak (3612035), Santa Teresa Hills (3712127), Solyo (3712153), Sonoma (3812234), Tassajara (3712177), Tres Pinos (3612173), Tumey Hills (3612056), Volta (3712018), Wilcox Ridge (3712133), Woodside (3712243)

Threat List Data from the CNDDB


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

Notes



Threatened by non-native plants and habitat alteration. To be expected in other adjacent counties. A synonym of Linanthus ambiguus in TJM (1990). See Botanical Gazette 11:339 (1886) for original description, and Aliso 19(1):55-91 (2000) 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 6 January 2025].