Laurel sumac (Malosma laurina)

Cashew or sumac family -- Anacardiaceae

September 1.  Mesa Trail

Color: White

Shrub

Native

Flax-leaved horseweed (Erigeron bonariensis)
Composite or sunflower family -- Asteraceae
September 1, 2015.  Mesa Trail
Color: White

Non-native

Mule fat or seep willow (Baccharis salicifolia)
Composite or sunflower family -- Asteraceae
September 1, 2015. Mesa Trail
Color: White
Seed head
Native

Thread stemmed fleabane (Erigeron foliosis)

Composite or sunflower family -- Asteraceae

July 5, 2015.  Mesa Trail

Color: White, Purple

Native

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

Mexican whorled milkweed, narrow leaf milkweed (Asclepias fascicularis)
Dogblane family -- Apocynaceae
July 5, 2015. Mesa Trail
Color: White, purple
Native

Longstem buckwheat (Eriogonum elongatum)
Buckwheat family -- Polygonaceae
July 5, 2015. Mesa Trail
Color: White
Native

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

Cliff aster (Malacothrix saxatilis)
Composite or sunflower family -- Asteraceae

July 5, 2015. Mesa Trail

Color: White

Native

Southern honeysuckle (Lonicera subspicata) 

Honeysuckle family -- Caprifoliaceae

July 5, 2015. Mesa Trail

Color: White

Native

Toyon or Christmas berry (Heteromeles arbutifolia)

Rose family -- Rosaceae

July 5, 2015. Mesa Trail

Color: White

Shrub

Native

Prickly pear (Opuntia littoralis)

Cactus family -- Cactaceae

July 5, 2015. Mesa Trail

Color: Orange, Yellow

Native

Bladderpod (Cleome arborea)

Caper family -- Capparaceae

July 5, 2015, Mesa Trail

Seed pods

Native

California buckwheat (Eriogonum fasciculatum)

Buckwheat family -- Polygonaceae

July, 2015. Mesa Trail

Native

Seed head

White horehound (Marrubium vulgare)
Mint family -- Lamiaceae
July 5, 2015. Mesa Trail

Color: white
Invasive

Seed head

Clustered tarweed (Deinandra fasciculata)

Composite or sunflower family -- Asteraceae

July 5, 2015.  Mesa Trail

Color: Yellow

Native

Seed head

Elderberry (Sambucus niger)

Elderberry or moschatel family -- Adoxaceae

July 5, 2015. Mesa Trail

Native

Lemonade berry (Rhus integrifolia)

Cashew or sumac family -- Anacardiaceae

July 5, 2015.  Mesa Trail

Shrub

Native