Here you can identify plants of the subfamily Agavoideae. This subfamily belongs to the large asparagus family (Asparagaceae).
The most common genera in this subfamily are agaves (Agava) and yuccas (Yucca). Some of these plants are popular garden or house plants.
At first glance, it is not obvious that the plantain lilies (Hosta) also belong to the subfamily Agavoideae. The same goes for the spider plants (Chlorophytum).