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)
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