Johnson grass; Egyptian millet
A perennial grass (Sorghum halepense) considered an invasive weed in many regions, but also used as forage. The Japanese name literally means 'Western barbarian sorghum'.
Johnson grass is highly reproductive and can become a problem in farmland.
In this region, Johnson grass is used as fodder.
Refers to sorghum in general, while セイバンモロコシ specifically denotes Johnson grass (Sorghum halepense).
Katakana spelling is standard for this plant name; usually written in kana.
Ateji kanji spelling; very rare and mainly of historical or academic interest.
Variant ateji kanji spelling; even rarer than 西蛮蜀黍.
From 西蛮 (seiban, 'Western barbarian') + 蜀黍 (morokoshi, 'sorghum'). The kanji are ateji; the word is usually written in katakana.