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Clear Lake Chapter

Chapter Meeting: How Does Your Prairie Grow?

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Ever wonder what exactly grows in a prairie? Iris Poteet of the Coastal Prairie Conservancy focuses on native and non-native plants found in the coastal prairie landscape with some discussion on selectively working to control non-native invasive species.

About the Speaker

Iris Poteet serves as a board member for the Coastal Prairie Conservancy, formerly known as Katy Prairie Conservancy. Since 1999, she has devoted volunteer efforts to preserving the Katy Prairie. After a 34-year banking career, Iris retired in 2017, joined NPSOT and completed levels 1 & 3 of its native landscaping program. As a Texas Master Naturalist since 2018, Iris focuses her advanced training and volunteer hours on all things prairie, and devotes most of her time at CPC’s Katy Prairie Preserve.

Meetings are open to members and non-members. If you would like to become a member, you may join online. For more information about the Native Plant Society of Texas and the benefits of membership please visit: www.npsot.org.

Hosted by Environmental Institute of Houston, University of Houston-Clear Lake

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**ARCHIVED POST AUTHOR: debbiebush

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About the Region

New Braunfels, the location of our Fall 2024 Symposium, straddles both the Edwards Plateau Ecoregion and the Blackland Prairie ecoregion. Interstate 35 divides the city of New Braunfels; its path through the city closely parallels the boundary of these two ecoregions, with the Edwards Plateau on the west side and the Blackland Prairies region to the east. 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 four host chapters (New Braunfels, Lindheimer, Guadalupe, and the Hill Country chapters) are located in one or both of the ecoregions above. However, the eastern portion of Guadalupe County also falls within the Post Oak Savanna ecoregion. Annual rainfall averages 35 to 45 inches, with higher averages to the east. A wide variety of hardwood trees are found, including several species of oaks, elms, and in the Bastrop area, loblolly pine (Pinus taeda). Grasses and forbs dominate in the open savannas, with most common grass being little bluestem. Ranching, agriculture, and fire suppression have allowed woody species to encroach on the once-open savannas.

Source: Wildflowers of Texas by Michael Eason