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Boerne Chapter

Attractive Grasses For Fall Color

By Delmar Cain

We are about midway through the autumn when the light of the mornings and twilight of the evenings make even the fading flowers seem bright. At this time of the year I begin to pay more attention to the grasses many of which are forming their seeds to produce the next generation. They are also producing food and potential denning or nesting material for birds and small mammals.

Grasses
Little Blue Stem in the Fall .

Probably my favorite is little bluestem (Schizachyrium scoparium var. scoparium), which I rambled through in the fields around our rural home in Upshur County as soon as my mother let me out of the house alone. Unlike where I live here in Kendall County, the sandy soil was deep and the rainfall was plentiful. Little bluestem, which has an extensive root system that can extend downward as much eight feet, lined the right of way on the county roads and covered many of the fields that had been farmed in previous years. I spent many hours chasing grasshoppers of all sizes and colors, wondering what kind of tobacco they had been chewing.

Grasses
Little Blue Stem in the Fall.

A native perennial bunchgrass and one of the big four grasses of the American tall grass prairie, little bluestem begins with bluish green leaves in the spring. During the summer the stems with silvery seed heads reach two to three feet tall, then turn a russet red in the fall. It tolerates a wide variety of well-drained soils and some shade. It is a host plant for some skipper butterflies and the common wood-nymph. It will please you in your flower garden or along the boundaries of your property. Don’t mow it if you want to encourage it and my advice is to encourage it at every opportunity. You can help in a small way in bringing back an important part of our Texas heritage. To find out how we lost it I urge you to read a brief pamphlet by Dr. Barron Rector, Associate Professor and Extension Range Specialist, Texas Agrilife Extension Service, in College Station. The pamphlet can be accessed at: http://austin-agrilife-org.wpengine.netdna-cdn.com/files/2011/08/NativeGrasslandPrairiesbyDrBarronRector_16.pdf

Purple bunch grass
Gulf muhly in the Fall.

Another of my favorite grasses is big muhly or Lindheimer’s muhly (Muhlenbergia lindheimeri), also a native perennial bunchgrass. Unlike little bluestem, which is native to almost every state in the lower 48 states, Lindheimer’s muhly is native mainly to the Edward’s Plateau and some adjoining counties. When we built our house in Boerne, Linheimer’s muhly was included in the plants installed by our landscaper. It performed very well and I added more in the next two years. Its tall (2-5 ft) blue-green to gray foliage and long white panicles or seed heads, which can last from May until November, make this grass a good Hill Country substitute for the non-native pampas grass, a native of southern South America. In June of 2010 Bill Ward wrote an article about Lindheimer’s muhly, which can be found on the Boerne NPSOT website at: http://www.npsot.org/wp/boerne/

Another native muhly grass, which my wife finds attractive, is gulf muhly or pink muhly (Muhlenbergia capillaris). It was planted in our original landscaping at our house, but failed to thrive, either from lack of water or more probably not enough sun. It is native to Texas and to the United State, but is generally found, as its name would imply, along the Gulf Coast. But I know it does grow well in our area because my wife points it out regularly on our drives to Boerne and to San Antonio.

Tall grasses in a yard landscape
Gulf muhly and Big muhly in the Fall.

Gulf muhly is also a perennial grass, which puts up a multi-branch seed heads that are purple. In the fall the seed heads become feathery and turn deep pink. The grass including the seed heads can be as tall as 3 1/2 feet. I must agree with my wife that in the fall light the grass is most attractive.

Besides its wonderful fall color another reason to mention gulf muhly, is the, so far sketchy, information that gulf muhly has been crossed with big muhly. My friend Marvin Hatter told me that he had seen something that resembled big muhly but had seed heads that were pink like gulf muhly. A web search revealed that there is something called Muhlenbergia “Pink Flamingo”. More research is in order. A plant as hardy as big muhly with a pink seed heads would be a great addition to our flower gardens.

About the Region

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Salado, the location of our Fall 2025 Symposium, lies at the intersection of two ecoregions: the Edwards Plateau (Limestone Cut Plain) and Blackland Prairie (Northern Blackland Prairie).

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