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Boerne Chapter

Backyard wildflowers — something a little different

Author: Bill Ward

We have many different kinds of native plants in our yard, not only to conserve water, but also because we think they make landscaping our yard more interesting and enjoyable. Luckily, we can get a variety of native plants from nurseries in Boerne or nearby in Medina, Kerrville, New Braunfels, San Marcos, and northern San Antonio.

Increasingly, natives are the plants of choice for new or refurbished urban and suburban landscapes. Several natives are becoming “standard” yard plants, almost as familiar as the once-widely-planted nandina and ligustrum, exotics that proved to be highly invasive.

Branched plant with purple flowers
Multi-branched eryngo with many flower heads. (Photo by Bill Ward)

Our backyard has three “non-standard” native plants that are brightening our landscape during the summer heat. These are easy-to-cultivate plants I’ve seen in very few other gardens. Even though these native plants are common in the wild in parts of the Hill Country, they are seldom available in nurseries.

One of our favorites is the indigenous eryngo (Eryngium leavenworthii). There are several species of eryngo around Texas, but the one that grows in the Hill Country is the most eye-catching. From mid-summer to fall, it has bright-purple flower heads that look like little purple pineapples. Its prickly lobed leaves give the impression of some sort of thistle, but it is a member of Apiaceae, the parsley family.

Close up of purple flower
Eryngo flower head composed of tiny purple flowers with blue anthers (pollen-bearing part). (Photo by Bill Ward)

The local purple eryngo is an annual which grows two or three high, with single or multiple-branching stalks. It likes full sun. Once a population gets established in the yard, it is difficult to tell where seeds might germinate the next spring. Probably it is not the best wildflower for a well-manicured garden, but it looks great in our “wild” backyard.

I got a start of eryngo from wild roadside plants Chuck Janzow showed me on the edge of Boerne. It is difficult and painful to gather the tiny seeds from eryngo. However, I found that I can choose the places eryngo will sprout by thrashing those spots of ground with a branch of dried flower heads (after they’ve gone to seed, of course). Covering the seeds with soil is unnecessary.

Yellow, 4-petaled flower
Water-primrose with bright-yellow four-petal flowers. (Photo by Bill Ward)

Another infrequently used native plant that gives us bright blooms much of the summer and fall is the water-primrose (Ludwigia octovalvis). Without a stream or pond or boggy area, I doubt it would be easy to cultivate this plant, but it does very well along the mud banks of our backyard pond.

Water-primrose is common on stream banks and in wet ditches in this area. It grows a few feet high, with conspicuous red-brown branches and dark-green lanced-shaped leaves. From July to October, it blooms with inch-and-a-half-wide bright-yellow flowers. Our plants are in full bloom during the hottest week of 2010.

Tall green plant with purple flowers
Montell bractspike (“Texas shrimp plant”). (Photo by Bill Ward)

Now for something entirely different — “Texas shrimp plant” (Yeatesia platystegia). A more accepted common name is Montell bractspike, but it reminds me of a shrimp plant. This little shrub has flowers in terminal spikes with greenish-yellow heart-shaped bracts and pale-lavender corollas.

Probably the Montell bractspike is cultivated in only two yards in this part of the Hill Country, at Rebecca Rogers’ house and ours. One of the few places in Texas where this Yeatesia grows prolifically in the wild is in Montell Canyon in northern Uvalde County, where Rebecca was raised.

Close up of small purple flowers
Close up of Montell bractspike. (Photo by Bill Ward)

Thousands of plants grow on the ranch of John Rogers, Rebecca’s cousin. Mr. Rogers kindly gave us a start of “Texas shrimp plant,” and it turned out to be easy to transplant with no apparent harm to the plant whatsoever.

I had suspected from the fact that it grows all the way from gravelly dry stream beds up to the highest hilltops, this shrub could tolerate a variety of growing conditions. It does very well in our backyard with little attention and only occasional irrigation.

Other natives blooming in our backyard this week are big bluestem and black-foot daisy (both native to our property), pigeonberry, flame acanthus, greeneyes, Salvia greggii, kidneywood, and the last of the standing cypress. Everything else is taking August off.

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About the Region

New Braunfels, the location of our Fall 2024 Symposium, straddles both the Edwards Plateau Ecoregion and the Blackland Prairie ecoregion. Interstate 35 divides the city of New Braunfels; its path through the city closely parallels the boundary of these two ecoregions, with the Edwards Plateau on the west side and the Blackland Prairies region to the east. The Edwards Plateau area is also called the Hill Country; however, this general term covers a much larger area extending farther north. Spring-fed creeks are found throughout the region; deep limestone canyons, rivers, and lakes (reservoirs) are common. Ashe juniper is perhaps the most common woody species found throughout the region. Additional woody species include various species of oak, with live oak (Quercus fusiformis) being the most common. Sycamores (Platanus occidentalis) and bald cypress (Taxodium distichum) border waterways. This area is well known for its spring wildflower displays, though they may be viewed in spring, late summer, and fall, as well. According to Texas Parks and Wildlife, average annual rainfall in the Edwards Plateau ranges from 15 to 34 inches.

The Blackland Prairie extends from the Red River south to San Antonio, bordered on the west by the Edwards Plateau and the Cross Timbers, and on the east by the Post Oak Savannah. Annual rainfall averages 30 to 40 inches, with higher averages to the east. This region is dominated by prairie species. The most common grass species include little bluestem (Schizachyrium scoparium) and Indian grass (Sorghastrum nutans) in the uplands and switchgrass (Panicum virgatum) in the riparian areas and drainages. Common herbaceous flowering plants include salvias, penstemons, and silphiums. This area has suffered greatly from overgrazing and agricultural use. Few intact areas remain, though many of the plants can be found along county roadsides throughout the region.

Our four host chapters (New Braunfels, Lindheimer, Guadalupe, and the Hill Country chapters) are located in one or both of the ecoregions above. However, the eastern portion of Guadalupe County also falls within the Post Oak Savanna ecoregion. Annual rainfall averages 35 to 45 inches, with higher averages to the east. A wide variety of hardwood trees are found, including several species of oaks, elms, and in the Bastrop area, loblolly pine (Pinus taeda). Grasses and forbs dominate in the open savannas, with most common grass being little bluestem. Ranching, agriculture, and fire suppression have allowed woody species to encroach on the once-open savannas.

Source: Wildflowers of Texas by Michael Eason