Texas mock orange

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Texas Mock Orange (Philadelphus texensis) and its almost identical relative, Canyon Mock Orange (P. ernestii), resemble miniature versions of the long popular non-native mock oranges and their cultivars, which have been grown as ornamentals since at least the early 1800s.

TexasMockOrangeOur native mock oranges are ornamental delights that grow one to three feet high with little dark glossy leaves. The multi-branched limbs are crowded with blooms in April and May, silky-white and fragrant. The flowers are only three quarters of an inch across and have four white petals around a bright-yellow center of numerous stamens. Jill Nokes in How to Grow Native Plants of Texas and the Southwest claims that Texas Mock Orange “produces flowers more prolifically” than canyon mock orange.

These natives can be used in home landscapes as low-growing flowering shrubs in shady locations.  They are not typically found in nurseries but ask for it. A few wholesale nurseries grow it, and we expect it to become increasingly available in the retail trade. Although it has no legal protection at present, collecting mock orange from the wild is highly discouraged. Besides, it doesn’t transplant very easily.

In their natural habitat, Texas and Canyon Mock Orange grow on boulders and steep walls in moist limestone canyons. Jill Nokes writes that Texas Mock Orange will adapt to heavier soil as far north as Dallas. Plant it in shady moist locations or where moisture can be provided. Its fragrant flowers and compact size make it an attractive shrub for planting near the house. Give it conditions similar to where it grows naturally – partial shade in moist but well drained soil. It will need protection from browsing deer.

Both mock oranges are endemic to the southeastern Edwards Plateau. Texas Mock Orange occurs only in Bandera, Edwards, Real, and Uvalde Counties, and Canyon Mock Orange is known only in Bandera, Blanco, Comal, Hays, Kendall, and Travis Counties. About the only way to distinguish the two in the field is by hairs on the underside of the leaf. Lower leaf surfaces of P. ernestii are covered with short straight hairs, while those of P. texensis are matted with a mix of short straight and long tangled hairs.

Planting our less-abundant native plants can be a way to help offset the effects of the decrease in native species diversity brought on by loss of habitat, deer browsing and invasion of exotics. And they’ll make an uncommon and interesting addition to your plants.

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**ARCHIVED POST AUTHOR: Bill Hopkins

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 fall Symposium host chapter, the Tonkawa Chapter, includes both of these ecoregions.

Source: Wildflowers of Texas by Michael Eason