Landscape Architecture Drawings
Armed, almost tropical in appearance, they have recently found wide use in landscaping and in containers with other ornamental foliage plants. In striking contrast, the leaves of A. striata, the Hedgehog Agave, are scarcely a half inch wide, stiff, and sharpiv pointed to make a bristling rosette two feet across.
Succulents are most adversely affected in the USA by collectors and people involved in arid landscaping and horticulture. Despite laws regulating their collection, specimens of Carnegiea gigantea (saguaro) continue to be illegally removed from habitat to be sold in the commercial landscaping trade. Likewise, specimens of Fouquieria splendens (ocotillo) and numerous barrel cacti
Provide food for humans and cattle Agave, Dasylirion, Nolina) and alcoholic beverages (Agave, Dasylirion including D. cedrosanum, Yucca). Flowers of Yucca elephantipes are eaten by people in south-east Mexico. Fruits provide food for humans (the baccate-fruited species of Yucca, including the more restricted Y. endlichiana, Y. arizonica, Y. grandiflora, and Y. madrensis). Trunks provide fuel (Dasylirion), while trunks and old stalks are used for the construction of temporary shelters, posts, porches, and corrals (Agave, Dasylirion, Nolina, Yucca). Some taxa are grown as living fence rows (Agave and Yucca). Rhizomes (usually erroneously referred to as roots) and, to a lesser extent, leaves, were or still are used to produce soaps, shampoos and detergents (Yucca including Y. madrensis, Manfreda, Prochynanthes, Polianthes, Furcraea longaeva, and Nolina palmer-i, a Baja California endemic), as insect repellents (Prochynanthes), and as medicines (Aga ve, Yucca, Manfreda, Prochynanthes)....
The spectacular stands of the giant saguaro in many parts of Arizona have been the subject of countless photographs and essays. I thoroughly enjoy looking out my window at the Desert Botanical Garden and seeing several handsome sa-guaros. Indeed, Carnegiea is one of the most popular cacti, not only in greenhouse collections but also in desert landscaping and outdoor gardens. The cactus has also been extensively studied with regard to ecology, growth dynamics, and reproduction.