potentilla
if i am correct the marigold has yellow flowers and has "mar" in its name.
Primroses are a type of primula with yellow flowers.
Yellow flowers include:Sunflowerevening primroseBlack-eyed Susansome varieties of DaylilyCoreopsisYarrowGoldenrodDaffodilYellow Iris
A yellow woodsorrel is a low spreading plant with yellow flowers, Latin name Oxalis stricta.
Probably chamomile. The flowers are harvested for teas and they have distinct demulcent purpose. Great for calming the stomach providing you aren't allergic to them.
African Violets and Azaleas are flowers. Alyssum, Aster and Amaryllis also are flowers.
From all the yellow wild flowers found there, Amarillo, Texas received its name.
oxlip
OXLIP
Cytisus or broom.
chimonanthus Praecox
Japonica