The term “bulb” refers to the below the soil growth or “protuberance” of a group of plants. This growth is a storehouse for the plant. Some “bulbs” are in fact “corms” or “tubers”. A tuber is a thick piece of stem with a bud whereas a corm is a stem without a bud. Either way, these “bulbs” will eventually develop into fully grown plants.
If you have many plants, then likely most of them will be considered foliage plants. Unlike flowering plants, they are not as showy. Instead they make up for it by growing easily and quickly, and acclimating themselves well to any environment in which they are placed.