Supplimental Leaf Information

This page is about the basics of leaves and leaflets.  For some better definitions, see the Curious Words page...

Axil - The place where the leaf stalk (petiole) meets the stem. Blade - The flat and laterally expanded portion of a leaf. Bud - The rudimentary stage of development of a branch, leaf, or flower. Margin - The edge of a leaf. Midrib - The central or main rib of a leaf. Node - The place on a stem where leaves or branches originate. Petiole - The stalk of a leaf blade or compound leaf. Stem - The main ascending axis of a plant. Stipule - An appendage at the base of a petiole.

Simple - A single leaf blade with a bud at the base of the leaf stem.  Notice the bud at the base of the leaf.

Compound - A leaf with more than one blade.  All blades are attached to a single leaf stem.  Notice the bud at the base of the leaf.

Parallel - Veins run more or less parallel toward the tip of the leaf.

Pinnate - A compound leaf with leaflets on two opposites sides of an elongated rachis.

Palmate - Lobes or segments attach to the stalk (petiole) at one point.

Resources and Bibliography

"Glossary.", and linked articles.  Scarborough High School.  2005.
< http://www.scarborough.k12.me.us/high/projects/trees/glossary.htm>.  (21 Jun. 2005).

"Biology of Horticulture:  Structure.", and linked articles.  Ohio State University.  2002.
< http://www.hcs.ohio-state.edu/hort/bio.html#structure>.  (28 Mar. 2006).