Japanese elm (Wilson's elm)
Ulmus davidiana Planch. var. japonica (Rehder) Nakai
[Ulmaceae]
Harunire (ハルニレ, 春楡)
Lifeform: deciduous tree < 30 m high
Distribution: northeastern China - Korea - Japan
Habitat: mesic sites (alluvial fan - mountain)
Seed dispersal: wind
Ulmus L.
U. davidiana Planch. var. davidiana L. K. Fu [not distributed in Japan]
Synonym: U. davidiana var. mandshurica Svortsov
Ulmus davidiana Planch. var. japonica (Sarg. ex Rehder) Nakai [Japan, including Hokkaido]
Synonym: U. propinqua Koidz.
- f. suberosa (Turcz.) Nakai コブニレ)
- f. kijimae (Makino) Sugimoto (ツクシニレ)
- f. laevis Miyabe (テリハニレ)
U. parvifolia Jacquin (アキニレ) [western Japan]
U. laciniata (Trautv.) Mayr (オヒョウ) [Japan, including Hokkaido]
- var. laevigata Inokuma (テリハオヒョウ)
- var. nikkoensis Rehd. (ニッコウアツシ)
Ulmus davidiana in Hokkaido
At the central campus of Hokkaido University on February 16, 2009. This species is an indicator species showing wetland.
Seeds and seedlings
[Left] many seeds with a stem at Yachidamo Park (Yachidamo = Fraxinus mandshurica), N28W4, West Ward, Sapporo, on May 31 2011.. [Center] The cotyledons attached with the stem on May 20 2009. [Right] the close-up.