Minecraft wiki entry for Development_versions, associated text: Found in shipwreck supply chests.
Can be crafted with a red and brown mushroom, a bowl and any flower.
It restores 6 () and 7.2 saturation points, and gives roughly 5 seconds of a status effect.
The effect given upon eating depends on which flower is used, as does the exact duration of the effect.
Oxeye daisy gives Regeneration.
Cornflower gives Jump Boost.
Lily of the valley gives Poison.
Wither rose gives Wither.
Tulip gives Weakness.
Azure bluet gives Blindness.
Allium gives Fire Resistance.
Blue orchid gives Saturation.
Poppy gives Speed.
Dandelion gives Saturation.