The black specks are bloodmeal to keep the deer off.
The stems aren't browning, but some of the leaves at the top seem to have browned slightly as they twisted.
It has been cool, with nights down in the forties for the past month, but not freezing.
Maybe something was used in the neighborhood and blew it this way but with all the rain I really doubt it. My asiatics are among them, and I've never noticed this effect on them. They're naturally shorter though.
It's just odd because this is the second time this has happened, and only to the oriental lilies (Salmon Star).
By adjacent, do you mean the lilies adjacent in the picture? I haven't seen distorted leaves on any of the other plants in the bed.