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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