Eating a dark mushroom will just cause the game screen replaced by a solid color background. Thus it's not advisable to eat them due to how rare they are.
Dotted Green Leaf - Green Leaf - Lime Leaf - Gold Leaf - Crystal Leaf - Striped Crystal Leaf
Red Mushroom - Blewit Mushroom - Snapegrass
Carrot - Tomato - Potato - Wheat
Tree - Oak Tree - Willow Tree - Maple Tree - Stardust Tree - Strange Tree - Ancient Tree - Redwood Tree
Dark Leaf - Dark Mushroom - Grass - Stardust Seeds - Light Mushroom - Pumpkin - White Leaf - Fire Wheat - Frozen Wheat