What are three plant adaptations found in the rainforest?

Some adaptations include trees with thin, smooth bark. They don't need thick bark to keep them from drying out because the rainforest is so wet. Trees often have buttresses, large branching ridges near the base, for support because their roots are often shallow and they grow tall to reach the sunlight.

Many plants in the rainforests have adapted leaf shapes that help water drip off the plant to avoid too much moisture, which might make bacteria and fungus grow.

Source: http://www.nceas.ucsb.edu/nceas-web/kids/biomes/rainforest.htm

Orchids have adapted to sunlight and no wet soil

The rainforest has a plant growth type which is vertical, meaning trees grow to great heights. Some plants (orchids, are a good example), have adapted to this by being arboreal (that is, they attach to trees in order to get more sunlight, since the tall trees do not allow much sunlight to reach the ground).