Prickley Ash

Aralia spinosa, commonly known as Devil's Walkingstick, is a woody species of plants in the genus Aralia, familyAraliaceae, native to eastern North America. The various names refer to the viciously sharp, spiny stems, petioles, and even leaf midribs. It has also been known as Angelica-tree.[1]

This species is sometimes called Hercules' Club, Prickly Ash, or Prickly Elder, common names it shares with the unrelated Zanthoxylum clava-herculis. For this reason, Aralia spinosa is sometimes confused with that species and mistakenly called the Toothache Tree,[2] but it does not have the medicinal properties of Zanthoxylum clava-herculis.

Aralia spinosa is occasionally cultivated for its exotic, tropical appearance, having large lacy compound leaves. It is closely related to the Asian species Aralia elata, a more commonly cultivated species with which it is easily confused.

Aralia spinosa is an aromatic spiny deciduous shrub or small tree growing 2–8 m (6–25 ft) tall, with a simple or occasionally branched stem with very large bipinnate leaves 70–120 cm (28–48 in) long. The trunks are up to 15–20 cm (6–8 in) in diameter, with the plants umbrella-like in habit with open crowns. The young stems are stout and thickly covered with sharp spines. The plants generally grow in clusters of branchless trunks, although stout wide-spreading branches are occasionally produced.[1]

The flowers are creamy-white, individually small (about 5 mm or 0.2 in across) but produced in large composite panicles 30–60 cm (12–24 in) long; flowering is in the late summer. The fruit is a purplish-black berry 6–8 mm (0.24–0.3 in) in diameter, ripening in the fall. The roots are thick and fleshy.

The doubly or triply compound leaves are the largest of any temperate tree in the continental United States, often about a meter (three feet) long and 60 cm (two feet) wide, with leaflets about 5–8 cm (2–3 in) long. The petioles are prickly, with swollen bases. In the autumn the leaves turn to a peculiar bronze red touched with yellow which makes the tree conspicuous and attractive.[1]

The habit of growth and general appearance of Aralia spinosa and related tree-forming Aralia species are unique. It is usually found as a group of unbranched stems, rising to the height of 3.5–6 m (12–20 ft), which bear upon their summits a crowded cluster of doubly or triply compound leaves, thus giving to each stem a certain tropical palm-like appearance. In the south it is said to reach the height of 15 m (50 ft), still retaining its palm-like aspect. However, further north, the slender, swaying, palm-like appearance is most characteristic of younger plants that have not been damaged by winter storms.[1]