Among the undergraduate plants, the cultivated bananas and plantains have the greatest economic value and many varieties. According to the research of S.T. Symonds and others, they all come from the wild Lena banana and Aga banana, or selected species and hybrids, or diploid, triploid and tetraploid. Bananas and banana fruits are used as fruits or dried bananas or powder as food or to extract alcohol. According to rough analysis, bananas and plantains contain 1.2 ~ 1.9% moisture, 74% starch, 3.7 ~ 4.2% protein and 0.5 1% fat. The fake stems and skins of bananas can be fed to pigs, the male flowers can be used as vegetables, the stems of bananas can be used for brewing or grinding, the fibers of the stems can be used for hemp, and they can also be used for weaving (called banana kudzu). Leaves can be wrapped, wax powder can be extracted, and juice can be used as food preservatives. The pseudostem of banana hemp can be used to make rope fiber (Manila hemp) which can withstand seawater immersion. Wild plantains are mostly used as raw materials for genetic breeding. Some plantains have bright red buds and erect inflorescences for viewing, but their fruits, flowers, tender hearts and roots are poisonous and inedible (such as index bananas and Oichi bananas). In addition to using fake stems as pig feed, Trollius chinensis can also be used as medicine, which has the effect of astringency and hemostasis. Stem juice is used to relieve drunkenness and aconite poisoning. Other species, such as banana pseudostems, can relieve fever and induce diuresis.

The scope of undergraduate course is narrowly understood as a family with the above three genera as considered by J Hutchinson, ал Takhtadzhyan and others. In a broad sense, such as A. engler's system, Musaceae is divided into three subfamilies: ① Musasubfamily; ② Musainae; ③ Orchidaceae. The general trend is that it is more appropriate to divide these three subfamilies into three families.