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fibrous layer absent; sclerotesta verrucose; spongy layer absent.
Without a complex of tree branches to slowly drip down, a spongy layer to soak into, raindrops land on the side of a building or on a parking lot and stream straight to the gutter.
If you pull up a piece of the lawn and a soft, spongy layer resembling compressed peat is between the blade of grass and the roots, you have thatch.