Salix urbaniana (a species of willow)
A specific willow species; the name is a botanical term. Usually written in katakana.
Salix urbaniana is a type of willow that grows in wetlands.
Katakana spelling is standard for this plant name; usually written in kana.
Kanji spelling is listed but is rarely used in practice; the katakana form is preferred.
The name オオバヤナギ literally means 'large-leaf willow', from 大葉 (large leaf) and 柳 (willow). The exact derivation of the species name is uncertain.