twig-robinia-pseudoacacia

Blacklocust  (Robinia pseudoacacia)

Blacklocust twigs display alternate leaf arrangement. The buds are hidden beneath the leaf scars, and saplings produce paired stipular spines.

Blacklocust twig with stout stipular spines.

The production of spine is a variable feature; tall old trees lack them.

Blacklocust twigs with and without stout stipular spines.