This valuable and useful information that can help you to learn more about the ash and help you identify the ash tree.. Natural conditions sometimes cause an ash trees leaves to wilt, turn yellow, curl and defoliate prematurely, However, these symptoms are more often a sign that the tree is infected with a disease or infested by insect pests. Prefers moist, fertile soils. Ash trees belong to the genus of flowering plants called Fraxinus. Learning how to identify these diseases will help you manage them properly. Texas Ash. OTHER COMMON NAMES: TEXAS WHITE ASH BOTANICAL NAME: Fraxinus texensis PRONUNCIATION: (FRAK-suh-nus tex-EN-sis) FAMILY: Oleaceae (Olive Family) TYPE: Deciduous shade tree HEIGHT: 30 to 50 feet SPREAD: 30 to 40 feet FINAL SPACING: 20 to 40 feet NATURAL HABITAT AND PREFERRED SITE: Texas ash grows natively in limestone soils of north Texas west to Palo Pinto … red ash Leaf Type: Deciduous Texas Native: Firewise: Tree Description: A large forest tree to 70 feet and a trunk to 2 feet in diameter, with spreading branches and an oval crown. Texas Ash. Gregg’s ash– Native to New Mexico, Arizona, and Texas, this tree is scientifically called Fraxinus greggii. Below the photos is information on different types of ash trees, including facts about the ash tree species, planting information, and close up colorful ash tree images.. Pumpkin ash– This tree gets its name from its trunk because the base of the trunk swells in the shape of a pumpkin when it gets wet. Ash Tree Facts. Fraxinus / ˈ f r æ k s ɪ n ə s /, English name ash, is a genus of flowering plants in the olive and lilac family, Oleaceae.It contains 45–65 species of usually medium to large trees, mostly deciduous, though a number of subtropical species are evergreen.The genus is widespread across much of Europe, Asia, and North America. This Gardenerdy article tells you about different diseases in Ash trees along with their treatment. Secondary Name(s): ash‐leaf maple Leaf type: deciduous Texas Native: yes Fruit Twig. Range/Site Description: A common bottomland tree across the eastern third of Texas, as far west as the Guadalupe River. Factors such as changes in soil and climatic conditions, insect and fungal attacks, etc., make them highly susceptible to some diseases. The Blue Ash and Black Ash trees are considered rare. Unlike the other native trees we’ve already mentioned, the Texas ash (also known as the mountain ash or by its scientific name, Fraxinus albicans) has a relatively short life, typically lasting between 15 and 20 years, and sometimes less. It is more like a large shrub than a tree as it grows to a height of between 10 and 20 feet.