Hemiptelea davidii

Hemeptelea davidii is a member of the elm or Ulmaceae family and is native of northeastern and Central China, Manchuria, eastern Mongolia and Korea. It is a shrub or tree, up to 10 m tall.

• Branches are armed with stout spines 2–10 cm long.
• Bark is dark gray to grayish brown; branchlets are grayish brown to brownish purple, pubescent; winter buds are ovate, usually 3-clustered in leaf axil.
• Leaves are deciduous, simple, elliptic, elliptic-oblong, 4–7 cm long and 1.5–3 cm broad, pointed, slightly asymmetric at the base, with 7–15 prominent teeth along each side; upper surface is dark green, lower surface lighter, glabrous except for a few scattered hairs on the midrib and main veins at first; stipules are oblong to lanceolate, 3-4 mm long; petiole 3-5 mm long, pubescent.
• Flowering is in April-May.
• Fruit is asymmetric, yellowish green, ovoid, 5-7 mm long, winged on one side only; seed is elongated and curved; stalk is slender, 2–4 mm long; fruit matures in September-October.