San Marcos Design Manual (March 16, 2021)

D A PP E ND I X

Planting Guidelines

Article 3: Noxious and invasive species A. Purpose. The purpose of the Noxious and Invasive Species List is to identify species that are noxious and invasive and therefore not suitable for the City of San Marcos. B. Problems. Problems develop when cer tain non-native hor ticultural species escape and establish in native areas. The preservation and planting of species found on the City’s noxious and invasive species list is problematic and therefore strongly discouraged. C. What is a Noxious and Invasive Plant? Any plant species that has a serious potential to cause economical or ecological harm to the agriculture, hor ticulture, native plants, ecology and waterways of Texas. D. Background. The City’s list is based on the Texas Depar tment of Agriculture Noxious Weed List and the Texas Parks and Wildlife Depar tment Prohibited Aquatic Plants list, and also includes some species from the USDA Forest Service Nonnative Invasive Plants of Southern Forests Field Guide. E. Disclaimer. State-required disclaimer: The City’s list of noxious and invasive species is only a recommendation and has no legal effect in the state of Texas. It is lawful to sell, distribute, impor t, or possess a plant on this list unless the Texas Depar tment of Agriculture labels the plant as noxious or invasive on the Depar tment’s plant list. F. Resources. The following resources were utilized to create the City of San Marcos Noxious and Invasive Species List:

City of San Marcos Noxious & Invasive Species List Scientific Name Common Name Ailanthus altissima Tree of heaven Alternanthera philoxeroides Alligatorweed Arundo donax Giant reed Bothriochloa ischaemum var. songarica King Ranch bluestem Broussonetia papyrifera Paper mulberry Centaurea melitensis Malta star-thistle Centaurea solstitalis Yellow Star-Thistle Colocasia esculenta Elephant ears Cynodon dactylon Bermudagrass Cyperus papyrus Papyrus Cyrtomium falcatum or C. beckettii Japanese netvein hollyfern Eichhornia azurea or E.crassipes Water hyacinth Firmiana simplex Chinese parasoltree Hedera helix English Ivy Hydrilla verticillata Hydrilla Hygrophila auriculata Hygrophila Iris Pseudacorus Yellow flag Iris Lantana montevidensis Purple trailing Lantana Ligustrum lucidum Glossy privet Lonicera japonica Japanese honeysuckle Macfadyena unguis-cati Catclawvine Melia azedarach Chinaberry tree Nandina domestica Heavenly bamboo Paulownia tomentosa Princesstree Photinia x fraseri Redtipped Photinia Phyllostachys aurea Golden bamboo Pistacia chinensis Chinese pistache Pistia stratiotes water lettuce Pyracantha coccinea Scarlet firethorn Rapistrum rugosum Bastard cabbage Ricinus communis Castorbean Roroppa nasturtium-aquaticum water cress

Texas Depar tment of Agriculture Noxious Weed List http://www.texasagriculture.gov Texas Parks and Wildlife Prohibited Exotic Species List

USDA Forest Service Nonnative Invasive Plants of Southern Forests http://www.invasive.org/eastern/srs/

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Amended: March 16, 2021 San Marcos Design Manual