It's one of the silk flowers from A Suitable Wardrobe, stuck through the buttonhole and pinned behind the lapel.
Hmm, I don't know. They look good in the pic because they drape nicely, but from the side they look quite full, and when walking they tend to flap around a lot and get stuck in the shoe, which looks terrible. I was wondering if tapering to 7.5" or 8" from the knee down (these are 9" right now) would mitigate those problems while still draping nicely. Might try to taper myself a pair of cheap polyester pants with the same leg opening and see how it looks, before risking it on a more expensive pair...
I "foofed" myself, and think it looks a bit better with legs tapered (and shoulders that fit, lol) :
Warning: Spoiler! (Click to show)