Morpheus

Japanese: Morpheus

In Greek mythology, it is said that the tree was brought to earth by the power of the harp played by Orpheus, who was unable to bring his wife Eurydice back from the underworld, and was also considered a sacred tree of Dionysus (Bacchus) due to its connection with grapes. It is also linked to Morpheus, the god of dreams, and it is said that those who sleep under it are plagued by nightmares. [Aramata Hiroshi]
[Ulmaceae]
Dicotyledonous plants, about 15 genera and 200 species, are distributed from the temperate zone of the Northern Hemisphere to the subtropics of the Southern Hemisphere (Figure).

From Hypnos

…He was the son of Nyx, the goddess of night, and the brother of Thanatos, the god of death. Morpheus, the god of dreams, was his son. He was a winged young man who was believed to induce sleep by touching the forehead of tired people with a branch or pouring liquid from his horn. …

*Some of the terminology explanations that mention "Morpheus" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ギリシア神話では，冥界から妻エウリュディケを連れ戻せなかったオルフェウスが，悲しみに暮れて弾いた竪琴の力でこの世に生じた木とされるほか，ブドウとの関連からディオニュソス(バッコス)の聖木とも考えられた。また夢の神モルフェウスMorpheusとも結びつけられ，その下で眠る者は悪夢に襲われるという。【荒俣宏】
【ニレ科Ulmaceae】
　双子葉植物，約15属200種が北半球温帯から南半球亜熱帯にかけて分布する(図)。…