In this glossary, definitions are given for the most commonly used terms for describing plants. Aborted an aborted organ is one that is not developed to the extent it should normally have Adpressed erect, pressed closed to stem or other part of plant. Adventitious roots springing from a stem whether aerial, underground or in water. Aerial developed above the soil, such as aerial stems so called in contradistinction to underground stems developed below the soil. Alternate attached to (...)