Sarcotesta
Encyclopedia
The sarcotesta is the outermost fleshy covering of Cycad
Cycad
Cycads are seed plants typically characterized by a stout and woody trunk with a crown of large, hard and stiff, evergreen leaves. They usually have pinnate leaves. The individual plants are either all male or all female . Cycads vary in size from having a trunk that is only a few centimeters...

 seeds. Below this layer is usually the sclerotesta
Sclerotesta
Sclerotesta is the innermost fleshy coating of cycad seeds, usually located directly below the Sarcotesta....

, the coating that makes direct contact with the cycad seed. In some species, however, there is an intermediate layer that is thought to be used in water retention and storage.
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