Taxon Report

Silene scouleri Hook. ssp. scouleri

Scouler's catchfly

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Taxon Summary

Silene scouleri ssp. scouleri, commonly known as Scouler's catchfly, is a perennial herb in the Caryophyllaceae that is found in California and elsewhere. It occurs within Coastal bluff scrub, Coastal prairie, and Valley and foothill grassland, growing at elevations from 0 to 600 meters. Silene scouleri ssp. scouleri is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Silene scouleri Hook. ssp. scouleri
Common Name:	Scouler's catchfly
Family:	Caryophyllaceae
Element Code:	PDCAR0U1MC
USDA Plants Symbol:	SISCS2
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: (Mar-May)Jun-Aug(Sep)	(Mar-May)Jun-Aug(Sep)
Elevation:	0-600 (0-1970)
General Habitats:	Coastal bluff scrub, Coastal prairie, Valley and foothill grassland
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.2
Global Rank:	G5T4T5
State Rank:	S2S3
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	added to 2B.2 on 2017-12-13

Occurrence Data from the CNDDB


Total Occurrences:	23
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	23

Location


California Endemic: False
California Counties and Islands: Name (Code)
Del Norte (DNT), Humboldt (HUM), Marin (MRN), San Francisco (SFO), San Mateo (SMT), Sonoma (SON)
Quads: Name (Quad Code)
Bodega Head (3812331), Childs Hill (4112461), Drakes Bay (3812218), Eureka (4012472), Franklin Point (3712223), Montara Mountain (3712254), Orick (4112431), Pigeon Point (3712224), Point Bonita (3712275), Requa (4112451), Rodgers Peak (4112421), San Francisco South (3712264), Sister Rocks (4112462), Tomales (3812228), Trinidad (4112412), Valley Ford (3812238)

Threat List Data from the CNDDB


Threat List Total:	4
EOs with Threat Listed:	Total EOs	% of EOs
	2	9 %
Grazing	1	4%
Non-native plant impacts	1	4%
Other	1	4%
Road/trail construction/maint.	1	4%

Notes



Potentially threatened by habitat loss, foot traffic, and recreational activities. Possibly threatened by herbivory. See Flora Boreali-Americana 1(2):88-89 (1830) for original description, and Revision of the North American Silene 26 (1947) for taxonomic treatment.
Threats:

Taxonomy:

Selected References

CRPR List Addition on 2017-12-13

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].