Cacti are fascinating- they work so hard conserving water, defending themselves from hungry animals and protecting themselves from intensely sunny days and bitter cold nights. Though when it comes to attracting pollinators, they put on the most exciting shows around.
Of course, the main purpose of a flower is reproduction. Its primary job is to attract pollinators to the reproductive organs of the plant.
"Threats to variety chisoensis include herbivory by jackrabbits and rodents during dry years that eat flowers and fruits which then affects reproductive output. Cactus moth also have a negative affect on the typical variety. Further, small population size is problematic for this species since it's an obligate outcrosser, and small populations may not attract the native bees that are necessary to pollinate the flowers. Dry years also negatively affect the bee populations, so dry years have a cascade of negative effects on this species (pers. comm. J. Poole)."
THREATENED TEXAS SERIES: Each palette & threatened species is unique. I have sampled colors from images of actual Texas Threatened Species: The Chisos Mountains Hedgehog Cactus (Threatened Texas Plant) Echinocereus chisoensis var. chisoensis to create this original works.