Simple vs. Compound Leaves

We are continuing our plant identification series, and this week we are discussing the different types of leaves that plants can have. A leaf, by definition, is any usually flattened green outgrowth from the stem of a vascular plant. Leaves always come off the stem and should have an auxiliary bud at the base of the leaf. While leaves can come in various shapes, colors, and textures, you will see two main types of leaves: simple leaves and compound leaves. A simple leaf may have lobes or be divided, but doesn’t have distinct leaflets. A compound leaf is separated into distinct leaflets, each with its small petiole. When in doubt, look for the auxiliary bud at the base of the leaf. The bud will always be at the base of the leaf, but not at the base of a leaflet.

There are three different types of compound leaves: pinnately compound (middle leaf ), bipinnately compound (left leaf), or palmately compound (right leaf). Of the compound leaf options, pinnately compound is the most common one you will find in the wild. After figuring out what type of leaf arrangement your plant has, you can then use the leaf type to help determine what plant you have. (leaflet- leaf-like part of a compound leaf, lacks an auxiliary bud at the base).

 

Have questions? Contact our office where our Horticulture Extension Agent will assist you with questions.

Phone: (316) 321-9660

Email: callae@ksu.edu