Taxon Details

Triphysaria floribunda

San Francisco owl's-clover

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Taxon Summary:

Triphysaria floribunda, commonly known as San Francisco owl's-clover, is a annual herb in the Orobanchaceae that is found only in California. It occurs within Coastal prairie, Coastal scrub, and Valley and foothill grassland, growing at elevations from 10 to 160 meters. Triphysaria floribunda is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Triphysaria floribunda (Benth.) Chuang & Heckard
Common Name: San Francisco owl's-clover
Family:	Orobanchaceae
Element Code:	PDSCR2T010
USDA Plants Symbol:	TRFL14
Synonyms/Other Names: Orthocarpus floribundus Benth.
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G2?
State Rank:	S2?
Other Status:
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2022-06-08

Ecology and Life History

Lifeform: annual herb

Blooming Period: Apr-Jun

Elevation:
10 - 160 meters
35 - 525 feet

General Habitats:

Coastal prairie
Coastal scrub
Valley and foothill grassland

Microhabitat Details:

Microhabitat:

Serpentine (usually)

Notes

Notes: Threatened by grazing, non-native plants, and trampling. See Systematic Botany 16(4):644-666 (1991) for revised nomenclature.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	9
	Total EOs	% of EOs
EOs with Threat Listed:	32	64 %
Grazing	22	44%
Non-native plant impacts	8	16%
Foot traffic/trampling	6	12%
Other	5	10%
Road/trail construction/maint.	3	6%
Development	3	6%
Erosion/runoff	1	2%
Insufficient population/stand size	1	2%
Mining	1	2%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					50
A	B	C	D	X	U
2	16	5	4	6	17

Occurrence Status:
Historical >20 Years	42
Recent <=20 Years	8

Presence:
Presumed Extant	44
Possibly Extirpated	4
Presumed Extirpated	2

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Marin (MRN), San Francisco (SFO), San Mateo (SMT)

Quads: Name (Quad Code)
Drakes Bay (3812218), Hunters Point (3712263), Inverness (3812217), Montara Mountain (3712254), San Francisco North (3712274), San Francisco South (3712264), San Mateo (3712253), Tomales (3812228), Valley Ford (3812238)

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