Plants Burned By Sun. They were growing under glass in bright sun. If only part of the plant was exposed to the sun there may only be certain sections showing signs of sunburn.
Summer heat and strong sun can make your plants sunburned. Add a little water and some nutrients from the soil and you get growth. This is something you should keep in mind.
Lastly if you are worried you have a shady house plant in the sun check the following list.
Even plants that can generally do well in hot weather can suffer from sunburn. It will look as if autumn has come early. This is the same part of the spectrum that causes us to sunburn. Its important to keep your plants protected or else they will be damaged by the sun.