Examples from the Web for understory
Understory thickets sprang up throughout most of the woodland, and especially in edge situations.
Vegetation was pinyon-juniper woodland with an understory of mixed shrubs.
A dense growth of coralberry (Symphoricarpos orbiculatus) forms the understory just below the crest of the hill.Natural History of the Bell Vireo, Vireo bellii Audubon|Jon C. Barlow
Saplings of honey locust made up an important part of the understory vegetation on this slope.
The highest population densities were in pinyon-juniper woodland having an understory of mixed shrubs.