Rare Plants of Texas

Jackie M. Poole, William R. Carr, Dana M. Price, Jason R. Singhurst

Publisher:

Texas A&M University Press

Publication Date:

January 7, 2008

Category:

History, Reference

Since 1987, when Texas Parks and Wildlife Department botanists published their first in-house summary of Texas’ threatened plants, more than 225 species have been identified and described as endangered, imperiled, or declining. Because most of these plants are too rare to be mentioned, much less pictured, in standard field guides, only a handful of botanists have known what these plants or their habitats look like.

Complete with photographs, line drawings, and county maps, this book describes the officially listed, candidate, and species-of-concern plants in Texas. Individual accounts include information on distribution, habitat, physical description, flowering time, federal and state status, similar species, and published references. The authors also provide brief introductory chapters on the state’s vegetation regions; the history of plant conservation in Texas; federal, state, and other ranking methods; threats to native plants; recovery methods; and reporting guidelines.

With the growing recognition that native plants support wildlife, conserve water, promote biodiversity, and exemplify our natural heritage, we must also recognize the need for greater understanding of endangered plants, the threats to their existence, and the importance of their survival. Rare Plants of Texas is highly recommended for professional botanists and advanced researchers, conservationists, students, range managers, and others concerned with preserving the ecosystems of Texas and the Southwest.

About the Region

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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