I really hope no one’s answered this for you yet, I saw this and got so excited that my obscure knowledge base might come into use. I had to stretch a few flowers so to speak but Victorian flower language allows for alteration in meaning depending on colour, fruit, flower, bud, steam, leaves and thorns, so I didn’t feel I was too far out of line. This message would work best as two bouquets bound together. First red Nasturtium with no leaves (red denotes a leader, the nasturtium a patriot) mixed with white or red Mask Flowers (rebellion, red if you want to emphasize fighting, white martyrdom) around Cypress (death). Then Chick weed (rendezvous) and Blue Convolvulus (night) surrounded by eight White Popular Leaves (symbolises the time: eight), Yellow Iris (flame, and a flower that grows by rivers) and Yellow Prarie Dock Flowers (this was closest I could find to docks)and one large Tomato Leaf, all bound in Dogwood Bark. Dogwood represents deceit, but as far as I could find the bark wasn’t used symbolically, and as you referred to the dog instead of a dog, I thought it was likely the pun should be a dead giveaway.