Hemiptelea
Hemiptelea davidii · Ulmaceae · 시무나무
How to spot it
Large branch thorns on the branches, long dark purplish-brown thorns 1.5 to 10 cm on one-year-old twigs, and half-moon-shaped samaras winged on only one side.
Look
- Leaves
- Leaves are alternate, long elliptic or elliptic, 2 to 6 cm long and 1 to 2 cm wide, with single teeth on the margin. There are 8 to 15 pairs of side veins and the leaf stalk is 1 to 3 mm.
- Flowers
- Blooms in April to May, one to four flowers in the leaf axils; the perianth is divided into four lobes and pale yellow. There are 4 stamens and 2 styles.
- Fruit
- The fruit is a flat half-moon-shaped samara winged on one side only, split into two at the tip, 5 to 6 mm long. It matures in September to October and the seed is curved.
- Bark
- The bark is gray-brown and shallowly fissured lengthwise.
Where it grows
- In Korea
- Native (Korean Peninsula)
- Native to
- Found in China and the Korean Peninsula (lowlands nationwide except Hamgyeongbuk-do and Hamgyeongnam-do).
- Ecology
- Grows along rivers and on hills. Very cold hardy and weak against dryness, but highly tolerant of wet soil, so it is not harmed by flood submersion; strongly tolerates wind, salt and pollution.