Honey Locust (also known as Thorny Locust or Sweet Locust)
Kingdom: Plantae, Division: Tracheophyta, Class: Magnoliopsida, Order: Fabales, Family: Fabaceae, Genus: Gleditsia, Species: G. triacanthos · Fabaceae (Legume, Pea, or Bean family) · Pinnately and bipinnately compound, deciduous
Species
Gleditsia triacanthos
Leaf Type
Pinnately and bipinnately compound, deciduous
Family
Fabaceae (Legume, Pea, or Bean family)
Shape
Linear to oblong leaflets with an obtuse or rounded tip
Size
The entire rachis shown is about 6-8 inches long, with individual leaflets measuring roughly 1-2 inches in length and 0.25 inches in width, typical for mature leaves.
Margin
Finely crenate or serrulate (with very small, subtle teeth)
Arrangement
Alternate on the twig, with leaflets arranged in opposite or alternate pairs along the central rachis
Rarity
Very Common
Color & Pattern
Dull medium to dark green upper surface, slightly paler green underneath, drying to an olive-green herbarium specimen color without special variegation or spots
Venation Pattern
Pinnate venation with a central midrib and fine secondary veins
Texture & Surface
Smooth, glabrous, somewhat papery due to being pressed and dried for a herbarium sheet
Description
This specimen is a singly pinnate leaf (or a pinna from a bipinnately compound leaf) of the Honey Locust tree. Gleditsia triacanthos is a medium to large deciduous tree famed for its open, graceful canopy, dappled shade, dark brown furrowed bark, and often fearsome branched thorns on the trunk and branches (though thornless cultivars are common in landscaping). It produces fragrant greenish-yellow flowers and long, twisted, leathery dark brown seed pods filled with sweet pulp.
Key Features
Pinnately or bipinnately compound leaves with small, oblong leaflets featuring finely toothed margins; often associated with branched, sharp thorns on the trunk; long, flat, twisted legume pods
Habitat
Found naturally in moist river valleys, floodplains, rich bottomlands, and along forest edges, though highly adaptable to urban environments, poor soils, and drought
Geographic Range
Native to central and eastern North America, from Pennsylvania west to Nebraska, and south to Texas and Mississippi; widely planted as an urban street tree
Condition Notes
Pressed and dried herbarium specimen in Good condition, neatly taped to standard FFA herbarium card paper with intact leaflets
Interesting Facts
The common name 'honey' comes from the sweet, sugary pulp found inside the long seed pods, which can be eaten raw or used to make fermented drinks. Native Americans used the hard wood for bows and the sweet pulp for food and medicine.
Medicinal & Uses
Wood is extremely durable in contact with soil, making it popular for fence posts and railway ties. Sweet pod pulp used historically for sustenance. Extensively planted as an urban shade tree, particularly thornless varieties like 'Skyline' or 'Shademaster'.
Ecological Role
Provides food for livestock, white-tailed deer, rabbits, and squirrels which eat the pods and seeds, aiding in seed dispersal. Tolerates pollution and urban stressors exceptionally well
Similar Species
Black Locust (Robinia pseudoacacia), which has wider, oval leaflets and paired stipular spines rather than massive branched trunk thorns, and produces white, pea-like flower clusters
Foraging Tips
Look for trees with fine, feathery foliage casting light shade, often found along fence rows, pastures, and disturbed bottomlands. Watch out for sharp thorns on wild specimens when foraging pods or examining bark.
Toxicity Warning
Non-toxic. The pulp of the seed pods is edible, though the seeds themselves are hard and unpalatable. No major human toxicity concerns