Female reproductive structure of a flower, composed of an ovule-containing ovary at the base, one or more pollen-receiving stigmas at the tip.

The mark left on the twig at the point of attachment of a leaf petiole when the leaf falls.

Tree of Heaven (Ailanthus altissima) – Leaf Scar
gla·brous (glā’brəs)
Smooth without hairiness or roughness.

lan·ce·o·late (lăn’sē-ə-lāt’)
Lance-shaped, broadest above the base, gradually narrowing to the apex.

fer·tile (fûr’tl)
Capable of producing fruit; or productive, as a flower having a pistil or an anther having pollen.

Pinnately compound leaves have the leaflets arranged along the main or mid-vein.

image source, Flicker user: chefranden