Biscayne Prickly Ash - Zanthoxylum coriaceum
Native to the West Indies, this Prickly Ash is present on the continent only in southern Florida, where it is rare. This is a shrub or small tree with a maximum height of about 20 feet. It grows in coastal hammocks. The twigs are armed with prickles as is the trunk. Distinctive for the winged leaf stalks, the small leaflets are somewhat wavy, and sometimes broadest near the tip. There are 2-6 pairs on each leaf. The tiny flowers are yellowish-green and borne in large showy clusters. The fruit is an egg-shaped capsule that splits at maturity, with a single shiny seed inside.