Guide to the Evaluation of Candidate Seed Graders and Seed Import Conformity Assessors
Appendix A - List of Specimens for Identification Evaluation
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The following list provides the common name and the Latin name of weeds, crops and plant diseases with which the candidate should be familiar.
Prohibited Noxious Weeds
- Dodder — Cuscuta spp.
- Jointed goatgrass — Aegilops cylindrica
- Slender Foxtail — Alopecurus myosuroides
- Woolly Cup Grass — Eriochloa villosa
Primary Noxious Weeds
- Canada thistle — Cirsium arvense
- Couchgrass — Elytrigia repens
- Field bindweed — Convulvulus arvensis
- Giant foxtail — Setaria faberi
- Globe-pod hoary cress — Lepidium appelianum
- Heart-pod hoary cress — Ledipium draba subsp. draba
- Horse nettle — Solanum carolinense
- Jimsonweed — Datura stramonium
- Johnson grass — Soghum halapense
- Leafy spurge — Euphorbia esula
- Lens-pod hoary cress — Lepidium chalepense
- Nodding thistle — Carduus nutans
- Perennial sow thistle — Sonchus arvensis
- Poison hemlock — Conium maculatum
- Red bartsia — Odontites vernus subsp. serotinus
- Russian knapweed — Rhaponticum repens
- Velvet leaf — Abutilon theophrasti
- Wild radish — Raphanus raphanistrum
Secondary Noxious Weeds
- Bladder campion — Silene vulgaris
- Cheat — Bromus secalinus
- Cleavers — Galium aparine, G. spurium
- Common ragweed — Ambrosia artemisifolia
- Cow cockle — Vaccaria hispanica
- Dock — All Rumex species except R. maritimus and R. acetosella
- Downy brome — Bromus tectorum
- Field brome — Bromus arvensis
- Field peppergrass — Lepidium campestre
- Japanese brome — Bromus japonicus
- Night-flowering catchfly — Silene noctiflora
- Persian darnel — Lolium persicum
- Stinkweed — Thlaspi arvense
- White cockle — Silene latifolia subsp. alba
- Wild carrot — Daucus carota subsp. carota
- Wild mustard — Sinapis arvensis
- Wild oat, sterile oat — Avena fatua, Avena sterilis
Disease Bodies
- Ergot — Claviceps purpurea
- Sclerotia — Sclerotinia spp.
Other Weeds
- American dragonhead — Dracocephalum parviflorum
- Ball mustard — Neslia paniculata
- Barnyard grass — Echinochloa Crus-galli
- Bluebur — Lappula squarrosa
- Green foxtail — Setaria italica subsp. viridis
- Hemp nettle — Galeopsis tetrahit
- Lady's Thumb/Pale Smartweed — Persicaria maculosa, P. lapathifolia
- Lamb's quarters — Chenopodium album
- Mallow — Malva spp.
- Pigweed — Amaranthus sp. except A. tuberculatus
- Russian pigweed — Axyris amaranthoides
- Russian thistle — Salsola trogus
- Wild buckwheat — Polygonum convolvulus
- Yellow foxtail — Setaria pumila subsp. pumila
Crops
- Barley — Hordeum vulgare
- Beans — Phaseolus vulgaris
- Canarygrass — Phalaris canariensis
- Canola, Rapeseed, Mustard — Brassica napus, B. rapa, B. juncea
- Common buckwheat — Fagopyrum esculentum
- Common wheat — Triticum aestivum
- Corn — Zea mays
- Durum wheat — Tricitum turgidum subsp. durum
- Fababean — Vicia faba
- Flax — Linum usitatissimum
- Lentil — Lens culinaris
- Oat — Avena sativa
- Pea — Pisum sativum
- Rye — Secale cereale
- Soybean — Glycine max
- Sunflower — Helianthus annuus
- Tartarian buckwheat — Fagopyrum tataricum
- Triticale — x Triticosecale spp.
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