Groeger, AlanWilliams, Casey R.2020-10-162020-10-162013-08Williams, C. R. (2013). Distribution and physical habitat requirements of Hygrophila polysperma in the San Marcos River, Hays County, Texas (Unpublished thesis). Texas State University-San Marcos, San Marcos, Texas.https://hdl.handle.net/10877/12795No abstract prepared.Text93 pages1 file (.pdf)enaquatic plantsexotic plantshabitatHygrophila polyspermaSan Marcos RiverThesis