Those look like olive trees? Grasses and agaves -- a drought-tolerant alternative to lawn in hot, dry climates. Oehme Van Sweden drought tolerant demonstration garden with grasses and agave at Cornerstone.
Red Grass, Wild Flowers, Garden Design, Roman, Mondo, Grasses, Feelings, Backyard, Spring
This black ornamental grass has fuzzy flower spikes that are a smoky purple-black color, and they emerge in late summer and contrast nicely with the fine, deep green foliage. Perennial Hgt: W: growth rate: moderate needs full sun
Perennial Plant of the Year 2014 - Panicum virgatum 'Northwind' (switch grass) A hardy, native grass stands up to harsh winds. Dense, but easy to divide. Non-spreading and low maintenance. Needs minimal water once established.