Xeriscaping, or drought-tolerant landscaping, has definitely gained in popularity here in California over the past three decades... the first demonstration gardens sprung up with state government support back in the early 1970s, following three years of drought.
Here in the foothills of the Sierras, I log an average annual rainfall of around 70 inches a year, however all of that falls between November and May, leaving around five months with barely any precipitation. While I might irrigate a tree or shrub I am getting started for the first couple of summers, my overall goal is to choose plants that can withstand the stresses of high summer heat and very low moisture... they need to be able to root deeply to dip into the aquifer and depend on groundwater for moisture, as we end up watching water closely many summers.
Of course, now that I am posting "X" in December, I don't have much in the way of lovely plants to photograph for you, but I can suggest a dynamite resource on the web, Colorado's Xeriscaping website. You will find that many common garden plants, such as the sages, lavenders and iris all are fairly drought-tolerant.
A good source of plants for xeriscaping is High Country Gardens.
Oaks, which root deeply and live a very long time, are a prominent part of the drought-tolerant California landscape. Trees, shrubs and plants that are native to your area are often the best choices for landscaping, as they have already figured out how to adapt to the unique climate... the California Native Plant Society maintains a unique demonstration garden in Sacramento for the purpose of educating the public about choosing native plants to incorporate into their home landscape, and offer plants for sale several times a year.
Garden practices to conserve water are also a big part of xeriscaping. Using mulches is the best way I know of to reduce the amount of water you need in the garden... two feet of straw mulch will protect almost anything and reduce your watering schedule down from once a day to once a week, but that is a lot of straw! I deeply covered my perennial bed at the start of summer, and discovered that the birds had a great time each morning kicking my straw around to look for bugs... well, I wanted to encourage their participation, but also noticed it made it harder to keep that deep layer needed. Straw compresses over time as it decomposes, so I will be buying several bales at the start of next season. As the straw breaks down this winter, it will add structure to my heavy clay soil, so after several years I will have something more along the lines of garden humus that art class clay.
The best photos of a drought-resistant garden that I could find for you are of the Water Efficient Demonstration Garden in Fair Oaks, maintained by the UC Cooperative Extension program. It's not too early to begin planning for next year's gardens, and I hope you will enjoy some of the information on xeriscaping, even if a lack of summer rainfall isn't a problem where you live.