Class A Weeds

Class A noxious weeds are those noxious weeds not native to the state that are of limited distribution or are unrecorded in the state and that pose a serious threat to the state. These weeds are a threat to all counties of the state and eradication is required.

Common Name
Scientific Name
Bean-caper, Syrian Zygophyllum fabago
Blueweed, Texas Helianthus ciliaris
Broom, French Genista monspessulana
Broom, Spanish Spartium junceum
Buffalobur Solanum rostratum
Clary, meadow Salvia pratensis
Clematis, oriental Clematis orientalis
Cordgrass, smooth (PDF) Spartina alterniflora
Cordgrass, common Spartina anglica
Cordgrass, salt meadow Spartina patens
Cordgrass, denseflower Spartina densiflora
Crupina, common Crupina vulgaris
False brome Brachypodium sylvaticum
Flax, spurge Thymelaea passerina
Floating primrose-willow Ludwigia peploides
Flowering rush Butomus unbellatus
Four o’ clock, wild Mirabilis nyctaginea
Hogweed, giant (PDF) Heracleum mantegazzianum
Hydrilla Hydrilla verticillata
Johnsongrass Sorghum halepense
Knapweed, bighead Centaurea macrocephala
Knapweed, Vochin Centaurea nigrescens
Kudzu Pueraria montana var. lobata
Mustard, garlic (PDF) Alliaria petiolata
Nightshade, silverleaf Solanum elaeagnifolium
Goatsrue Galega officinalis
Reed sweatgrass (PDF) Gyceria maxima
Ricefield bulrush Schoenoplectus mucronatus
Sage, clary Salvia sclarea
Sage, Mediterranean Salvia aethiopis
South American spongeplant Limnobium laevigatum 
Spurge, eggleaf Euphorbia oblongata
Starthistle, purple Centaurea calcitrapa
Thistle, Italian Carduus pycnocephalus
Thistle, milk Silybum marianum
Thistle, slenderflower Carduus tenuiflorus
Variable-leaf milfoil Myriophyllum heterophyllum
Woad, dyers Isatis tinctoria