What Bison Did For Bees: The Story of the World’s Greatest “Weed”

By Peter Keilty, Austin Chapter

Sunflower and bee opening image

Sunflowers can feel so familiar that it is easy to overlook how extraordinary they are. In Texas, wild sunflowers are not just cheerful roadside flowers or garden volunteers. They are durable native plants that feed pollinators, shelter wildlife, and flourish in places many other species would reject.

The article traces that relationship from personal memory to prairie ecology. What begins with childhood fascination becomes a larger story about how sunflowers connect people, birds, insects, and landscapes. Their towering height may catch our attention first, but their real value is in the web of life they support.

Maximilian sunflower
The Maximilan Sunflower (Helianthus maximiliani) is a perennial species which provides reliable forage for pollinators and birds, year after year.

Texas is home to a remarkable diversity of sunflowers, including the familiar common sunflower (Helianthus annuus). These species thrive in open ground, disturbed soil, and hot urban spaces, making them especially valuable in a warming climate where dependable summer forage can be hard to find.

The title’s central idea is that disturbance has always been part of the sunflower’s story. Historically, bison helped create the open, dynamic conditions these plants could exploit. Later, people spread sunflowers far beyond their original range, sometimes unintentionally, but in ways that still benefitted wildlife.

That usefulness is not limited to pollinators. Sunflower seed heads feed birds and mammals, their blooms attract native bees, and their ability to colonize hard places makes them a lifeline in vacant lots, roadsides, and neglected corners of the built environment.

Vacant lot with common sunflower
A vacant lot awaiting development in Austin’s West Campus neighborhood, colonized by Common Sunflower. This species thrives in urban areas which seem inhospitable to life, and provides refuge for wildlife, however temporary.

Seen through that lens, calling the sunflower a “weed” misses the point. Its resilience, generosity, and ecological usefulness are exactly what make it one of Texas’ most important summer wildflowers.

Did you like this article? It’s from our Summer 2026 Texas Native Plants magazine. Read more here

Summer 2026 Texas Native Plants

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