desert poppies

genus Eschscholzia

Member of poppy family (family Papaveraceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

Except for old historical records and extremely rare examples that I don't expect to encounter, there are no other wild species of this genus in the bay area.

california poppy
Eschscholzia californica

has a distinct pink disc below the corolla (receptacle rim ≥ 0.5 mm) [example]
by far the most common poppy in the bay area

tufted poppy
Eschscholzia caespitosa

has no more than an indistinct disc below the corolla (receptacle rim ≤ 0.3 mm) [example]
its recepticle slants smoothly down to the width of the stem
can be found at Pinnacles NP, but is extremely rare in the bay area

recepticle

diamond-petaled california poppy
Eschscholzia rhombipetala

has no more than an indistinct disc below the corolla
its recepticle looks comparatively bloated, as it is wide at the top before slanting down to the width of the stem
found east of Mt. Diablo, but is unknown in the rest of the bay area

2 observed taxons / 1 unobserved taxon / 1 key

Chris’s observations: 213 (209 are research grade)

Locations:

Henry Coe SP: 23
Russian Ridge OSP: 16
Edgewood Park & Natural Preserve: 14
Calero CP: 11
Monte Bello OSP: 11
Almaden Quicksilver CP: 10
Santa Teresa CP: 10
Coyote Hills RP: 9
Coyote Lake / Harvey Bear Ranch CP: 9
Fremont Older OSP: 8
Sunol Wilderness RP: 7
Joseph D. Grant CP: 6
Long Ridge OSP: 6
Rancho Cañada del Oro OSP: 5
Mission Peak RP: 4
Máyyan 'Ooyákma Coyote Ridge OSP: 4
Sweeney Ridge National Recreation Area: 4
Coyote Valley OSP: 3
Ed R. Levin CP: 3
El Corte de Madera OSP: 3
Purisima Creek Redwoods OSP: 3
Sierra Azul OSP: 3
Lexington Reservoir CP: 2
Pinnacles NP: 2
Point Lobos SP: 2
Sibley Volcanic RP: 2
Sierra Vista OSP: 2
Skyline Ridge OSP: 2
Windy Hill OSP: 2
Bear Creek Redwoods OSP
Castle Rock SP
Coyote Creek Trail
Crockett Hills RP
Del Valle RP
Dry Creek Pioneer RP
Garin RP
Garrapata SP
Golden Gate National Recreation Area
Joaquin Miller Park, Oakland
La Honda Creek OSP
McNee Ranch / Montara Mountain SP
Mt. Diablo SP
Mt. Madonna SP
Mt. Tamalpais SP
Novitiate Park, Los Gatos
Pacheco SP
Pearson-Arastradero Preserve, Palo Alto
Picchetti Ranch OSP
Pleasanton Ridge RP
Sam McDonald CP
San Bruno Mountain State & County Park
San Jose, CA
San Pedro Valley CP
Saratoga Gap OSP
Ulistac Natural Area, Santa Clara
Waterdog Lake & Open Space

Months:

Jan.: 5
Feb.: 17
Mar.: 42
Apr.: 47
May: 27
Jun.: 21
Jul.: 29
Aug.: 4
Sep.: 6
Oct.: 10
Nov.: 3
Dec.: 2

For more details, use advanced search.

Taxon info: iNaturalist – Calflora – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora