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  Guide to the Common Trees of Pennsylvania

Trees | Glossary | Visual Guide | Leaf Parts, Types, & Position

Black Locust
(Wide & Flat: Alternate Arrangement)
A medium-sized tree to 45' high, found in open woods, floodplains, thickets and fencerows throughout the State. Wood is durable in contact with the soil and in demand for posts, poles, railroad ties, and mine timbers. Unfortunately, several insects and wood rots cause heavy damage, especially to trees on poor soils. Squirrels eat the seeds and bees make honey from the nectar of locust flowers.

Black Locust
Robinia pseudoacacia L
enlarge

Leaves
Alternate, compound, 7-19 oval leaflets 1"-2" long, margins smooth.
Twigs
Angled, somewhat zigzag, brittle, with short stout prickles; no end bud, side buds small and hidden in winter.
Fruit
A thin, flat pod, 2"-4" long; usually with 4-8 seeds; splits into halves when ripe. Flowers white, showy, very fragrant in drooping clusters, appearing in May and June.
Bark
Reddish brown, rough, furrowed, thick.

Select a Tree from a menu below, or download the Visual Guide

Needle-Shaped or Linear

  

Wide & Flat: Opposite Arrangement

Wide and Flat: Alternate Arrangement

Information courtesy of:
PA Department of Conservation & Natural Resources
 
 

Whitetailed Deer
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