Fountain Grass, still sold as an ornamental landscape plant in nurseries in Arizona, has escaped to the wilderness NPS Staff. Fountain grass has displaced native plants in this wash. It burns hot, so a fire would desroy the native plants that did not evolve with fire. NPS Staff. Invasive Plant Species: Fountain Grass. Fountain grass (Pennisetum setaceum), is a perennial bunch grass with attractive purple or green flowers. It is an ornamental plant that is still sold in nurseries. Although some nursery varieties are considered 'sterile', no varieties are recommended for planting and landscaping. Choose other attractive native grass alternatives for your landscape, like sacaton (Sporobolus wrightii), or rabbit-resistant deer grass (Muhlenbergia regens).
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