Northeastern Asian Flora
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Ulmus davidiana Planch. ex DC.  
Family: Ulmaceae
[Ulmus davidiana var. mandshurica Skvortsov, moreUlmus davidiana var. pubescens Skvortsov, Ulmus davidiana var. suberosa (Turcz.) Miyabe]
Ulmus davidiana image
Chin Sung Chang
  • Japan Flora
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Korea Flora: Deciduous tree. Height 15m. Diameter 50-70cm. Winter buds and branchlets ovoid to conical, apex acute, with 5-6 scales, terminal buds equal to or slightly larger than lateral buds (3-5mm long). Flower buds round to broadly ovate, large. Branchlets with woolly hairs, leaf scars shallow semicircular or triangular. Leaves alternate, obovate-elliptical, apex caudate-acuminate, base asymmetrically cuneate, size 4-8cm × 2-6(7)mm, margin with sharp double serration, upper surface scabrous or smooth, lower surface with relatively abundant hairs on midrib and lateral veins. Petiole 3-7(10)mm long, pubescent. Flowers perfect, about 10 flowers fascicled on two-year-old branches. Perianth campanulate, shallowly 4-divided. Stamens 4, opposite to perianth lobes, exserted; stigmas 2, ovary unilocular with single embryo. Fruit and seeds samara, spoon-shaped or elliptical, 10-15mm long, with fine hairs in central portion, seeds attached slightly above wing center.

Sporophyte chromosome number: 28.
Flowering period: March-April (late April in Gangwon-do)
Fruiting period: Mid May-Early JuneDistribution: Northern China, Japan (Hokkaido-Kyushu); Throughout Korean Peninsula

Taxonomic notes: The distribution map presented here combines Ulmus macrocarpa and U. davidiana due to the practical difficulty in distinguishing the key diagnostic character of fruit pubescence.

Ulmus davidiana
Open Interactive Map
Ulmus davidiana image
Chin Sung Chang
Ulmus davidiana image
Chin Sung Chang
Ulmus davidiana image
General Administrator
Ulmus davidiana image
Chin Sung Chang
Ulmus davidiana image
Chin Sung Chang
Ulmus davidiana image
General Administrator
Ulmus davidiana image
Chin Sung Chang
Ulmus davidiana image
Chin Sung Chang
Ulmus davidiana image
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Development supported by College of Agriculture and Life Sciences of Seoul
National University and Korea National Arboretum of Korea Forest Service.
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