Penstemon digitalis the plant that is named Dark Towers. The hybrid has tubular pink flowers that grow up to 1.5 inches tall, red foliage, and is 1.5 feet to 3 feet tall. Although Dark Towers is similar to Husker Red, its red foliage is darker than that of the Husker Red cultivar and has more height. It also stays red for a longer time in the summer. Dale Lindgren created and named both Husker Red and Dark Towers at the University of Nebraska in 1983. Lindgren decided to create Husker Red because of its purplish-red foliage. Penstemon digitalis Penstemon digitalis (foxglove beard-tongue,
Chemical plant workers typically include engineers, plant operators, and maintenance technicians. Other personnel at the site could include chemists, management/administration and office workers. Types of engineers involved in operations or maintenance may include chemical process engineers, mechanical engineers for maintaining mechanical equipment, and electrical/computer engineers for electrical or computer equipment. Large quantities of fluid feedstock or product may enter or leave a plant by pipeline, railroad tank car, or tanker truck. For example, petroleum commonly comes to a refinery by pipeline. Pipelines can also carry petrochemical feedstock from a refinery to a nearby petrochemical plant. Natural gas is a product which comes