Botanical terms arranged alphabetically

(L., ab-, away from) The side away from the axis; the back surface of a leaf. Compare to adaxial.

Small, dry, thin-walled fruit that does not open at maturity (indehiscent) containing a single seed.

Radially symmetric flower, with sepals, petals, and stamens radiating from the center of the flower. 

(L., acumen, a point) tapering to a long tip (usually of leaf tips)

(L. acutus, to sharpen) an apex formed by two margins meeting at less than a 90 degree angle; its sides more or less straight; Opposite: obtuse

(L., ad-, toward) The side of an organ facing the axis; the upper side of a leaf. See also, abaxial. 

One leaf per node. Leaves positioned at different levels on the stem. See also, opposite. 

(L., amplexus, to embrace) When the leaf base or stipules completely encircle the stem by meeting on the other side. 

The pollen-bearing portion of the stamen. 

(L., apex, tip) The tip of a leaf, the point farthest from the base.