Maybe because the leaves of cucumber plant captures or its more exposed to sun and that's why thy become white or yellow on the edges
Cucumber
White. The parasitic plant has yellowish flowers, small yellowish green leaves, and waxy white berries.The plant itself is green, the berries are white.mistletoe is green with yellowish leaves and has white berriesThe berries on mistletoe are white.
mold
Variegated
Variegated.
THE ANSWER IS AN ARUM LILY
White teas has caffeine. The word white is used because the tender leaves at the tip of the tea plant are picked vs the older leaves.
Stonecrop
Pumpkin leaves could have been eaten by some kind of bug, possibly and most likely an aphid. This is probably why the leaves turned white.
stonecrop
Stonecrop
Indian Pipe flowers are completely white including stems ect... because they contain no chlorophyll