Opuntia cacanapa ~ El Capote Ranch, Gonzales County
By early July, the peak flowering of assorted Texas cacti has come to an end. The plants — claret cup, lace, hedgehog — fade back into the landscape, and even the more obvious pencil cactus can be hard to spot without its bright red fruit.
Even the best-known of our cacti, the prickly pear, rarely shows deep summer blooms. Still, occasional plants were producing their delightful flowers across the Texas hill country the first weekend in July.
Opuntia engelmannii var. lindheimeri ~ Old Willow City Road, Gillespie county
There are more species of prickly pear than I’d ever imagined, and distinctions among them sometimes depend on such small details as the number and arrangement of spines and glochids: a part of the cactus that, once encountered, never is forgotten. Flower color isn’t the best guide for prickly pear, since color variation occurs in all species.
I’m relatively certain that the identification of the first cactus, O. cacanapa, is correct. It’s worth noting that German geologist Ferdinand Roemer, for whom so many of our plants are named, visited the El Capote ranch during his collecting trip to Texas in 1845-1847.
While the other identifications are ‘best guesses’ based on size, spine color, and other factors, there’s no doubting the plants’ membership in the the genus Opuntia, or the beauty of their flowers.
Eastern Prickly Pear (Opuntia humifusa) ~ Sabinal river crossing, Bandera County
Comments always are welcome.
Texas prickly pear (Opuntia engelmannii var. lindheimeri) ~ Galveston Island
The barrier islands of the Texas coast are well enough known for the beachcombing, fishing, and partying they offer. But behind the dunes, a world of flowering plants and grasses holds sway, including several species of cacti.
On my neighborhood islands — Galveston, Follett’s, and Brazos — at least three species of prickly pear can be found in addition to Opuntia engelmannii: O. humifusa (previously O. compressa), O. macrorhiza, and O. stricta, which is nearly spineless. Still, my favorite is the common Texas prickly pear.
Flowers range from a bright, clear yellow to orange, or even red. Sometimes, flowers of all three colors appear on the same plant. Many flowers combine colors and, as they age, even the brightest yellow fades toward the same delicate, peachy hue that characterizes the buds.
Yellow prickly pear flowers on Follett’s island
The petals of aging flowers sometimes seem to thin; in the right light, they can glow like paper lanterns.
A flower still blooms along the Blue Water highway at sunset
Regardless of color, prickly pear flowers contain an abundance of pollen. Bees, flies, beetles, and ants are common pollinators, with larger bees taking advantage of the easy access to pollen provided by the flowers.
Here, a bee pauses before taking the plunge, perhaps to appreciate the riches spread before it. When it comes to the prickly pear — the state plant of Texas — the bee and I are equally appreciative.
Comments always are welcome.
A note regarding taxonomy: Some sites consider O. engelmannii and O. lindheimeri to be separate species. Others continue to list the Texas prickly pear as O. engelmannii var. lindheimeri. For a comparison of the species, click here. (The site as a whole is an excellent resource.)