Tell me whether these are flowers or trees: Spruce, Calla Lily, Carnation, pine, beech, Orchid, oak, Tulip, Gerbera Daisy.

Spruce is a tree.
Calla Lily is a flower.
Carnation is a flower. 
pine is a tree.
beech is a tree.
Orchid is a flower.
oak is a tree.
Tulip is a flower.
Gerbera Daisy is a flower.