Boerne Chapter

Cenizo–A Western Plant For Dry Conditions

By Delmar Cain

At the time I am writing this article in early December, the temperature is a balmy 73 degrees Fahrenheit and there has been no appreciable rainfall at our house since September. But according to the National Weather Service, I can expect that the temperature will be in the 20’s before this article gets published. Also I am informed that the chances of rain are slight although I might see a bit of drizzle by next Friday.

Purple flowers
Close up of cenizo flowers.

The reason for such a detailed recitation of the current climate is to assure you that the above conditions are the normal conditions for cenizo, the December Plant of the Month for the NICE (Natives Instead of Common Exotics) program of the Boerne Chapter of NPSOT (Native Plant Society of Texas).

Purple flowers
Silver leaves of cenizo.

Cenizo, (Leucophyllum frutescens) draws a crowd of common names, which include Texas sage, Texas ranger, Texas rain sage, Texas silverleaf, ash-bush, wild lilac, senisa, cenicilla, palo cenizo, hierba del cenizo, and my favorite, purple sage. My guess is that when it blooms, which it does periodically from summer to fall with the high humidity or high soil moisture after a rain, it makes itself noticed, regardless of other plants that are in bloom. The striking purple flowers can cover the plant and anyone not suffering from color blindness will want to know its name or will give it one.

Cenizo is a medium sized shrub, which has a native range from the Western Edwards Plateau west through the Trans-Pecos to New Mexico and south through the Rio Grande Plains to Northern Mexico. It grows in well-drained alkaline soil generally found on or near stony or rocky caliche slopes. It is drought and heat tolerant and needs little or no maintenance when established and when located in a sunny, well-drained location. Poor drainage will make it susceptible to cotton root-rot, too little sun will promote leggy growth, fertilizing is unnecessary and aggressive pruning, if you pay for your yard work, will lighten your wallet with no benefit to the plant. It is cold hardy to 5 degrees. What is not to like about this plant!

Bushes wiht purple flowers
Natural shape of cenizo.

As I indicated before I like the name “purple sage”, primarily because I associate it with that early Zane Gray novel “Riders of the Purple Sage”. I also probably saw at least two of the five movie versions, since one starred Tom Mix and a later version starred George Montgomery, both of whom were favorite cowboy actors of mine. However although I remember the title, I didn’t remember the plot. With a bit of research I was surprised to find that the villains in the story were overly zealous Mormons in Utah, apparently trying to keep the women in their “appropriate places” but checked by what became our models for the laconic hero cowboys. A hundred years have brought many changes in villains, but the victims have remained fairly constant. Given the story location in Utah, the horsemen may have been riding in purple sage, but it was not cenizo.

A more recent “western” hero, at least to those interested in native plants, is Benny Simpson, a horticulturist who worked for many years with the Texas A & M Research and Extension Service in Dallas, and who was devoted to getting native plants introduced into commercial production. Scouting in the Trans-Pecos and Far West Texas for native plants that had landscape potential, his efforts culminated in the production of several familiar ornamentals. Through his work two species of cenizo, ‘Green Cloud’, which has green leaves instead of silver leaves, and ‘White Cloud’, which has white flowers, are now available at most commercial nurseries. Simpson was also one of the founders and a former president of the Native Plant Society of Texas.

Bush in a flower bed
Cenizo on grounds of Patrick Heath Library.

By the way who said that rabbit trails are a waste of time. When I tried to find out a bit more about cenizo, I came across the Cenizo Journal, a quarterly publication from Alpine, that includes poetry, photography, art, fiction and articles of interest about West Texas. All that can be yours for a mere twenty-five dollars per year. The article in the current issue by Colin Shakelford on producing native seeds for grassland restoration and the article by Donna Smith titled “Frontier Medicine- the hospital at Ft. Davis” are well worth reading. It is not the New Yorker, but the journal has an authenticity that is deserving of attention and support. For a good stocking stuffer for someone or for yourself send your subscription check to Cenizo Journal, P. O. Box 2025, Alpine, Texas 79831.

Enjoy the holidays.

About the Region

Fall Symposium 2025 Logo - Teach for the Future

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