Any of several yellow-flowered plants, especially the marsh marigold?

----C-P (7 letters)

Any of several yellow-flowered plants, especially the marsh marigold?
Dandelion.

Nipplewort.

Goats-beard.

Colts-foot.

Wall-lettuce.

Marsh Ragwort.

Sundew.

Everlasting Sweetpea.

Field Buttercup.

Corn Marigold.

Corn Sowthistle.

Tansy'

Golden Rod.

Daffodil.

Yellow Flag.

Yellow Loosestrife.

Creeping Jenny.

Cowslip.

Oxlip.

Yellow Pimpernel.

Monkey-flower.

Honeysuckle.

Rock Rose.

Yellow Horned Poppy.

Welsh Poppy.

Marsh Marigold.

King Cup.
Reply:The guy above has named most of them
Reply:suggest KINGCUP ?- do you know the composer in clue 9 down

Pat
Reply:kingcup
Reply:kingcup