Thorns
Honey locust trees bear large flat thorns (up to 35 cm long) that may injure humans and livestock and damage tractor tyres. Thornless trees (Gleditsia triacanthos inermis) are obtained through grafting (Wilson, 2006).
Tannins and saponins
Honey locust pods are rich in condensed tannins, with reported values ranging from 2.8 to 14.8% DM (Bruno-Soares et al., 2003; Kamalak et al., 2012). Total phenols vary between 4 to 14% (Bruno-Soares et al., 2002). Saponins (5.2% DM) have also been found in the pods (Bruno-Soares et al., 2003).