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100 most dangerous invaders
Type of organism Name Photo
Aquatic plants
hydrilla - Hydrilla verticillata
Aquatic plants
toxic cyanobacteria - Cylindrospermopsis raciborskii
Aquatic plants
yellow floating heart - Nymphoides peltata**
Land plants
African rue - Peganum harmala**
Land plants
camelthorn -  Alhagi pseudalhagi
Land plants
cape ivy -  Senecio mikanioides**
Land plants
coltsfoot (not Petasities frigidus) - Tussilago farfara**
Land plants
giant hogweed -  Heracleum mantegazzianum**
Land plants
goatgrasses (barbed, ovate) -  Aegilops triuncialis, A. ovata
Land plants
hawkweeds (king-devil, meadow, mouse-ear, orange, yellow) - Hieracium piloselloides, H. pratense**,H. pilosella, H. aurantiacum**, H. floribundum
Land plants
giant reed grass -  Arundo donax**
Land plants
kudzu -  Pueraria lobata**
Land plants
matgrass -  Nardus stricta**
Land plants
mile-a-minute weed -  Polygonum perfoliatum*
Land plants
Paterson's curse -  Echium plantagineum**
Land plants
Portuguese broom -  Cytisus striatus**
Land plants
purple nutsedge -  Cyperus rotundus
Land plants
silverleaf nightshade -  Solanum elaegnifolium
Land plants
skeletonleaf bursage -  Ambrosia tomentosa
squarrose knapweed -  Centaurea virgata**
Land plants
starthistles (Iberian, purple) -  Centaurea iberica**, C. calcitrapa**
Land plants
Syrian bean-caper -  Zygophyllum fabago
Land plants
Texas blueweed -  Helianthus ciliaris
Land plants
thistles (plumless, smooth distaff, woolly distaff) -  Carduus alanthoides**, Carthamusbaeticus, Carthamus lanatus**
Aquatic invertebrates
Asian clam -  Potamocorbula amurensis
 
Page updated: January 02, 2008

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