#ventral

• Adaxial — Facing toward the axis, located in the direction of the axis, or oriented toward the upper surface of a plant organ (such as the upper or inner surface of a leaf, situated closest to the plant stem). In botanical morphology, the term describes the structural polarity of organs during their developmental phase, being the opposite of 'abaxial'.
• Amphigastria — Minute, rudimentary, structurally modified leaves arranged in a median row on the ventral side of the stem in most species of leafy liverworts (Jungermanniales). These plant microstructures have the role of retaining water through capillarity and protecting the stem against dehydration in forest or rocky habitats.