Minecraft wiki entry for Bush, associated text: Dead Bush – a transparent, brown, "dead-looking" block found in desert, badlands, and giant tree taiga biomes.
Sweet Berry Bush – a transparent block found in taigas and snowy taigas which can be used to harvest sweet berries when grown.
Rose Bush – a type of flower found in forests, birch forest, and dark forest biome variants.
Leaves – blocks that grow as a part of trees, which have a "bush-like" look and are thus sometimes used to simulate bushes when building.
Azalea – decorative blocks only obtainable from the creative inventory that have flowering and flower less versions.
Shrubs - two variants of grass, one of which has the same appearance as a dead bush and the other the same appearance as normal grass. ‌[Legacy Console Edition only]