All aquatic non-native species known to occur in Texas 

     The species are grouped by rank of Fundamental Invasiveness Index.  Number of counties of occurrence is indicated in parenthesis. 

 

F1-AQUATIC

Alternanthera philoxeroides  (20+)

Colocasia esculenta  (11)

Eichhornia crassipes  (25)

Hydrilla verticillata  (ca. 85)

Myriophyllum aquaticum  (18)

Myriophyllum spicatum  (10)

Nasturtium officinale  (35)

Pistia stratiotes (10 or more)

Salvinia molesta  (10)

 

F2-AQUATIC 

Ceratopteris thalictroides  (1)

Cryptocoryne beckettii  (1)

Egeria densa  (3)

Hydrocleys nymphoides  (1 or few)

Hygrophila polysperma  (2)

Landoltia punctata  (6)

Limnophila sessiliflora  (2)

Ludwigia grandiflora subsp. grandiflora  (3)

Ludwigia grandiflora subsp. hexapetala  (9)

Nomaphila stricta  (1)

Nymphoides indica  (1)

Nymphoides peltata  (2)

Ottelia alismoides  (1)

Potamogeton crispus  (8)

Salvinia minima  (2)

Xanthosoma sagittifolium  (1)

 

 

Last update: 27 July 2009

Guy Nesom