@Tenlic1, I think thats the point
@FVbico Well then this bug isn't a bug. It is a compatibility error.
@Kumasasa It only happens, as far as I can tell, when the world is switched from 1.9.x to 1.8.x and back again.
This happened to me when I accidentally loaded my world in 1.8.2 instead of 1.9.2. They were not there in 1.8.2, but after switching back again they appeared. They show sunflower break particles when broken.
EDIT: When broken, all touching flowers disappear.
EDIT 2: In the Debug Menu, they show up as being minecraft:double_plant with variant sunflower.
Example
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See here: http://imgur.com/M59tT0C
Coords on screen, -261 70 701
Seed: -8868047874811899863
Version: 1.10
EDIT: also tested on 1.10-pre release 1, same results