LUKE: Yeah, [Dad] just wanted me to make sure [Louie] got a proper funeral. You know, respectful, dignified.
LORELAI: No horseshoe carnation wreaths, got it.
Carnations are traditional funeral flowers, symbolising love and remembrance. Horseshoe wreaths at funerals are commonly made, sometimes symbolising good luck, but especially for people with a connection to horses – including gamblers, I suppose. Lorelai’s funeral snobbishness sounds like something of which Emily would approve!