CNPS Inventory Plant Detail

Plagiobothrys diffusus

Common Name:	San Francisco popcorn-flower
Family:	Boraginaceae
Synonyms:
Element Code:	PDBOR0V080
Full Name:	Plagiobothrys diffusus (Greene) Jtn.
USDA PLANTS Symbol:	PLTOD

Biology
Lifeform: annual herb Blooming Period: March - June Habitat: • Coastal prairie • Valley and foothill grassland

Rarity Status
CA Rare Plant Rank: 1B.1 Rare, threatened, or endangered in California and elsewhere .1: Seriously endangered in California Federal Listing Status: Not Listed State Listing Status: CE Endangered (09/79) State Rank: S1 S1: Critically Imperiled. Global Rank: G1Q G1: Critically Imperiled. (There are taxonomic questions associated with this name)

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 12
Element Occurrence Ranks:

A B C D X U

5 2 4 0 0 1

Population Status:

Historic >20 yrs	Recent <=20 yrs
7	5

Presence:

Present Extant	Possibly Extirpated	Extirpated
12	0	0

Notes

Known from approximately ten occurrences. Threatened by development and non-native plants. Identification difficult; taxonomic work needed. See P. reticulatus var. rossianorum in The Jepson Manual. See Pittonia 1:14 (1887) for original description, and Contributions from the Arnold Arboretum 3:77 (1932) for revised nomenclature.
To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
Date Added: 1974-01-01
Last Update: 2010-03-15

Location

Elevation: 60 - 360 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Alameda (ALA), Santa Cruz (SCR), San Francisco (SFO) *, San Mateo (SMT)

Quads: name (DWR code) USGS code
Soquel (387B) 36121H8, Santa Cruz (387E) 36122H1, Laurel (407C) 37121A8, Felton (408D) 37122A1, Franklin Point (409A) 37122B3, Ano Nuevo (409D) 37122A3, Oakland East (465C) 37122G2, San Francisco North (466C)* 37122G4

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

1383

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora CalPhotos Consortium of California Herbaria California Department of Fish and Game: CNDDB Quick Viewer

Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .

-122.25,37.125