Endangered Plants

As the Center for Plant Conservation (CPC) custodian for endangered plants in South Texas, the San Antonio Botanical Garden plays an important role in assuring that these regional plants do not face extinction. Research varies with each species but may involve collection of propagules from as many sites as possible, storing seed here and at the national seed bank lab in Colorado. Working out propagation and growing protocols for each species is an on-going research objective. Growing plants to maturity, displaying them in the Botanical Garden and interpreting their value to the public are part of the program as well.

The plant list currently includes the following:

  • South Texas Ambrosia
    Ambrosia cheiranthifolia
  • Prostrate Milkweed
    Asclepias prostrata
  • Texas Ayenia​
    Ayenia limitaris
  • Plains Gumweed
    Grindelia oolepis
  • Walker’s Manioc
    Manihot walkerae
  • Zapata Bladderpod
    Physaria thamnophila
  • Ashy Dogweed
    Thymophyllal tephroleuca
  • South Texas Rush Pea​
    Caesalpinia phyllanthoides​
  • Chandler’s Craglily​
    Echeandia chandleri
  • Slender Rushpea
    Hoffmannseggiai tenella
  • Runyon’s Huaco
    Manfreda longiflora
  • Welder Machaeranthera
    Psilactis heterocarpa
  • Bailey’s Ballmoss
    Tillandsia baileyi

WaterSaver Plants

In partnership with the San Antonio Water System (SAWS), the Botanical Garden has two home demonstration areas that show environmentally appropriate plantings for South Texas. Discover a variety of native and non-native plants that withstand the harshest elements and create a drought-tolerant and beautiful landscape.

  • WaterSaver Garden - Plantlings demonstrated a colorful landscape that is low in water use. Birds and butterflies flock to the plantings, which include salvia, esperanza, Pride of Barbados, plumbago and yucca.
  • WaterSaver Lane - Six cottage settings demonstrate the various options for homeowners in creating an attractive South Texas landscape that uses less water, minimizes lawn and offers habitat for wildlife.

Other Research Partnerships