Clustered tarweed (Deinandra fasciculata)

Composite or sunflower family -- Asteraceae

August 9, 2015.  Upper Santa Rosa Trail

Color: Yellow

Native

Seed head

Saw-toothed goldenbush, sawtooth bristleweed (Hazardia squarrosa)

Composite or sunflower family -- Asteraceae

August 9, 2015.  Upper Santa Rosa Trail

Color: Yellow

Shrub

Native

Black mustard (Brassica nigra)

Mustard family -- Brassicaceae

August 9, 2015. Upper Santa Rosa Trail

Color: Yellow

Seed head

Invasive

California encelia, California brittlebush, or bush sunflower (Encelia californica)
Composite or sunflower family -- Asteraceae
August 9, 2015, Upper Santa Rosa Trail
Color: Yellow
Seed head

Native

Clustered tarweed (Deinandra fasciculata)

Composite or sunflower family -- Asteraceae

July 8, 2015.  Upper Santa Rosa Trail

Color: Yellow

Native

Seed head

Prickly lettuce (Lactuca serriola)
Composite or sunflower family -- Asteraceae
July 8, 2015. Upper Santa Rosa Trail
Color: Yellow
Invasive

Saw-toothed goldenbush, sawtooth bristleweed (Hazardia squarrosa)

Composite or sunflower family -- Asteraceae

July 8, 2015.  Upper Santa Rosa Trail

Color: Yellow

Shrub

Native

California encelia, California brittlebush, or bush sunflower (Encelia californica)
Composite or sunflower family -- Asteraceae
July 5, 2015, Public Access Road, Wildwood Regional Park
Color: Yellow

Native

Saw-toothed goldenbush, sawtooth bristleweed (Hazardia squarrosa)

Composite or sunflower family -- Asteraceae

July 5, 2015.  Public Access Road, Wildwood Regional Park

Color: yellow

Shrub

Native

Prickly lettuce (Lactuca serriola)
Composite or sunflower family -- Asteraceae
July 5, 2015. Wildwood Canyon Trail
Color: Yellow
Invasive

Conejo buckwheat (Eriogonum crocatum)

Buckwheat family -- Polygonaceae

July 5, 2015. Wildwood Canyon Trail

Color: Yellow

Native

Deerweed or California broom (Acmispon glaber)

Legume or bean family -- Fabaceae

July 5, 2015. Stagecoach Bluff Trail

Color: Yellow

Native

Tree tobacco (Nicotiana glauca)
Nightshade family -- Solanaceae
July 5, 2015. Mesa Trail
Color: Yellow
Invasive

Fetid gourd or Missouri gourd (Cucurbita foetidissima)
Gourd family -- Cucurbitaceae
July 5, 2015. Mesa Trail
Color: Yellow
Native

Prickly pear (Opuntia littoralis)

Cactus family -- Cactaceae

July 5, 2015. Mesa Trail

Color: Orange, Yellow

Native

Saw-toothed goldenbush, sawtooth bristleweed (Hazardia squarrosa)

Composite or sunflower family -- Asteraceae

July 5, 2015.  Mesa Trail

Color: yellow

Shrub

Native

Clustered tarweed (Deinandra fasciculata)

Composite or sunflower family -- Asteraceae

July 5, 2015.  Mesa Trail

Color: Yellow

Native

Seed head

Conejo buckwheat (Eriogonum crocatum)

Buckwheat family -- Polygonaceae

May 19, 2015. Wildwood Canyon Trail

Color: Yellow

Native