Originally published on stacker.com, part of the BLOX Digital Content Exchange.

Peter Belhumeur just wanted to know what type of tree was outside his apartment. He scanned field guides, looking for willowlike leaves with a wavy, spiked edge, but he couldn’t find the right one.

Spring is in full bloom and trees are beginning to look green again. Learning how to identify trees in yards, neighborhoods and local parks provides insight into the diversity and relationships found ...

*Refers to the latest 2 years of stltoday.com stories. Cancel anytime. Stacker used information from forestry and landscaping sites to compile a quiz to identify trees by looking at their leaves.

*Refers to the latest 2 years of stltoday.com stories. Cancel anytime. Stacker used information from forestry and landscaping sites to compile a quiz to identify trees by looking at their leaves.