California buckwheat (Eriogonum fasciculatum)

Buckwheat family -- Polygonaceae

September 1, 2015. Moonridge Trail

Seeds

Native

Bush monkeyflower or sticky monkeyflower (Mimulus aurantiacus)

Figwort family -- Scrophulariaceae

August 9, 2015. Upper Santa Rosa Trail
Seeds

Native

Milk thistle (Silybum marianum)

Composite or sunflower family -- Asteraceae

July 8, 2015.  Upper Santa Rosa Trail

Seed head

Seeds

Invasive