Yucca

 

The yucca is a genus of about 40-50 species of perennials, shrubs and trees. Native to hot, dry territories, it has adapted to a very wide range of climatic and environmental conditions: from rocky deserts to semi-temperate zones. Yuccas are also an interesting example of a mutualistic co-evolutionary system: their reproduction depends on pollination by yucca moths (family Prodoxidae), which transfer pollen from the stamens of one plant to the stigma of another, and at the same time lay an egg in the flower, feeding on only a few seeds, and always leaving enough for the species to perpetuate.
The roots of the yucca soaptree are rich in saponins, which is why they are used as a shampoo in Native American rituals, and its fibers can be used to make cordage, both sewing thread and rope.

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GIARDINO GRAVINA