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Tier 1 - Threat

Achyranthes japonica Japanese Chaff Flower
Bythotrephes longimanus Spiny waterflea
Carex kobomugi Asiatic sand sedge, Japanese sedge
Crassula helmsii Swamp crop, Pygmyweed
Didymosphenia geminata Didymo
Glyceria maxima Reed manna grass
Hydrocharis morsus-ranae Frogbit
Impatiens glandulifera Himalayan balsam, Policeman's helmet
Imperata cylindrica Cogon grass
Kalopanax septemlobus Castor aralia
Lepidium latifolium Broad-leaved pepper-grass
Ludwigia adscendens Water primrose
Ludwigia hexapetala Uruguayan primrose willow
Ludwigia peploides Floating primrose willow
Murdannia keisak Marsh dewflower
Myriophyllum heterophyllum Broadleaf/variable-leaf watermilfoil
Nandina domestica Heavenly bamboo
Oplismenus hirtellus ssp. undulatifolus Wavyleaf basketgrass
Pennisetum alopecuroides Fountain grass
Tamarix ssp. (T. chinensis, T. parviflora, T. ramossima) Saltcedar, Tamarisk
Vitex rotundifolia Beach vitex, Roundleaf chastetree
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