Big Bend Chapter

Program – December 7: Fighting Invasive Species on the Rio Grande

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[from Dallas Baxter]

Fighting invasive river cane on the Rio Grande.
Fighting invasive river cane on the Rio Grande.

Photo credit: Raymond Skiles

The Big Bend Chapter of the Native Plant Society of Texas will present a program on invasive species on the Rio Grande from 8:30 a.m. to 1:30 p.m. on Saturday, December 7 at the Warnock Visitor Center one and a half miles east of Lajitas on Hwy. 170 (the River Road).

Participants will leave from the depot parking lot in Alpine at 8:30 a.m. to travel to Lajitas. Program presenter, Raymond Skiles, will present a program on invasives at the Center followed by a hike along the river to examine and discuss the invasive plant species threatening the health of the river and food and habitat for native species of birds and animals.

Skiles was a wildlife biologist in Big Bend National Park for 30 years, specializing in invasive species removal.

Following the program, participants will return to the Warnock Center for a brown bag lunch and the trip back to Alpine. Participants should dress for the weather, wear close-toed shoes and bring a lunch and water.

The mission of the Native Plant Society is the promotion of research, conservation and utilization of native plants and habitats through education, outreach and example. The Big Bend group meets monthly with programs and field trips. The public is invited to attend and is asked to make a $5 donation which can be used toward a membership on the day of the meeting. Membership information is available at every meeting.

Reservations are required and can be made by contacting Fonda Ghiardi.

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**ARCHIVED POST AUTHOR: billarmstrong

About the Region

2026 Fall Symposium Logo

This low-elevations region of Texas extends inland from the barrier islands, about 60 or so miles, and stretches from Brownsville to Louisiana. In total, it covers about 9.5 million acres, with a high point of 150 feet in elevation. More than 1000 species of plants can be found in this region. On the southern end, species more common in Mexico (such as Sabal mexicana) and Central America occur.

The barrier islands provide us with dune systems, and clay flats to the inland side, which have species found in these areas alone. Many plants here, such as Ipomoea pes-caprae (beach morning glory), can be found throughout tropical regions of the globe. I’ve encountered the same species on the beaches of Guam.

Once inland, vast marshes and wet prairies occur. Occasionally, oak (Quercus fusiformis) groves can be found. Common grasses include species of Bothriochloa, Paspalum, and Sporobolus; eastern gamagrass (Tripsacum dactyloides); and switchgrass (Panicum species). Many rivers and creeks cut through the Gulf Prairies, and along these riparian areas various species of trees, Sabal minor, and other plants adapted to clay soils can be found. Due to overgrazing, farming, and fire suppression, woody species such as mesquite (Prosopis glandulosa) and huisache (Acacia farnesiana), and invasive species such as chinaberry (Melia azedarach), Brazilian pepper (Schinus terebinthifolius), and Chinese tallow (Sapium sebiferum) have increased and displaced our native flora.

Source: Wildflowers of Texas by Michael Eason