Wikipedia
Mugunghwa-ho
The Mugunghwa-ho or Mugunghwa is a class of train operated by Korail, the railroad of South Korea. Mugunghwa trains are the cheapest class of trains to operate cross-country. Along rural lines such as the Gyeongbuk Line, they remain the only class of passenger train operating. They (and in some cases the Tonggeun) are the only trains to stop at many stations not served by Saemaul-ho or KTX trains. Mugunghwa are built to accommodate large numbers of standing passengers, and frequently have many more standees than sitting passengers.
The Mugunghwa-ho takes its name from the mugunghwa, the national flower of South Korea.