Apetalous. Without petals.
Apex. The tip of leaf, twig, or other plant part.
Apical. Pertaining to apex.
Ascending. Growing obliquely or indirectly upward from point of attachment.
Axil. Upper angle between a leaf or other plant part and the stem to which it is attached.
Bisexual. Having both sex organs on the same plant; a hermaphrodite.
Blade. The flat expanded portion of a leaf or parts of a compound leaf.
Catkin. A flexible, usually pendulous, scaly spike bearing unisexual flowers.
Ciliate. Having a margin fringed with hair.
Compound Leaf. A leaf with two or more separate leaflets.