Austin Chapter

Shield Ranch Field Trip Report

What a great day, perfect weather, gorgeous wildflowers, and so many knowledgeable botanists in our group. Bill Carr, a well-known Austin Area botanist, lead us across a lush prairie, along the edges of Oak/Ash forest and down to Barton Creek, pointing out native plants. Our group was a nice mix of people who were new to botany, experienced botanists, and everything in between. Bill did a great job of picking plants that would be interesting to all levels of interest, from the largest Oak tree to the tiniest Rabbit Tobacco. There was so much to see, I’m not sure we even covered a mile.

As quoted on their website “At Shield Ranch, stewarding and protecting the Hill Country ecosystem is our solemn purpose. Located just 18 miles southwest of downtown Austin, we are a 6,400-acre historic district and protected wildland. Today, we are home to a mosaic of habitats, a diverse community of native plants and animals, and over six breathtaking miles of Barton Creek. Through an evolving program of land management, unique nature immersion experiences, and conservation easements with the Nature Conservancy and the City of Austin, Shield Ranch offers something exceptionally rare in our rapidly urbanizing community—a truly wild place. Join us in making sure it stays that way.”

At the end of our walk, those who brought lunches gathered in “The Camp” dining hall. The architecture was as beautiful as the landscape, and completely sustainable. It was nice to have some social time with other native plant enthusiasts and linger a little while longer before going back to our busy urban lives. I felt so fortunate to have the opportunity to visit this beautiful property. Thanks to our Field Trip Coordinator, Jackie OKeefe, for setting this up for us.

Cheers,
Claire Sorenson
President, NPSOT Austin

About the Region

Fall Symposium 2025 Logo - Teach for the Future

Salado, the location of our Fall 2025 Symposium, lies at the intersection of two ecoregions: the Edwards Plateau (Limestone Cut Plain) and Blackland Prairie (Northern Blackland Prairie).

The Edwards Plateau area is also called the Hill Country; however, this general term covers a much larger area extending farther north. Spring-fed creeks are found throughout the region; deep limestone canyons, rivers, and lakes (reservoirs) are common. Ashe juniper is perhaps the most common woody species found throughout the region. Additional woody species include various species of oak, with live oak (Quercus fusiformis) being the most common. Sycamores (Platanus occidentalis) and bald cypress (Taxodium distichum) border waterways. This area is well known for its spring wildflower displays, though they may be viewed in spring, late summer, and fall, as well. According to Texas Parks and Wildlife, average annual rainfall in the Edwards Plateau ranges from 15 to 34 inches.

The Blackland Prairie extends from the Red River south to San Antonio, bordered on the west by the Edwards Plateau and the Cross Timbers, and on the east by the Post Oak Savannah. Annual rainfall averages 30 to 40 inches, with higher averages to the east. This region is dominated by prairie species. The most common grass species include little bluestem (Schizachyrium scoparium) and Indian grass (Sorghastrum nutans) in the uplands and switchgrass (Panicum virgatum) in the riparian areas and drainages. Common herbaceous flowering plants include salvias, penstemons, and silphiums. This area has suffered greatly from overgrazing and agricultural use. Few intact areas remain, though many of the plants can be found along county roadsides throughout the region.

Our fall Symposium host chapter, the Tonkawa Chapter, includes both of these ecoregions.

Source: Wildflowers of Texas by Michael Eason