Gallery

Family

Genus

Common name

Noxious Weed Seed

AOSA Examination List

Species Category

Disseminule/Planting Unit

Shape

Seed length

Seed width

Seed thickness

Color

Texture

Other structures

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Monochoria vaginalis. True seeds with ribs that join at a dark circle at the apex. Photo by Julia Scher, USDA-APHIS-PPQ.

Monochoria vaginalis
Monochoria vaginalis. True seeds with ribs that join at a dark circle at the apex. Photo by Julia Scher, USDA-APHIS-PPQ.

Monochoria vaginalis. Light brown true seeds. Photo by Julia Scher, USDA-APHIS-PPQ.

Monochoria vaginalis
Monochoria vaginalis. Light brown true seeds. Photo by Julia Scher, USDA-APHIS-PPQ.

Montanoa hibiscifolia. Achenes with a large, veined, lateral wing with a serrated margin.

Montanoa hibiscifolia
Montanoa hibiscifolia. Achenes with a large, veined, lateral wing with a serrated margin.

Moraea collina. Seeds with a spike arising from the margin of the apex of the flat surface. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea collina
Moraea collina. Seeds with a spike arising from the margin of the apex of the flat surface. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea collina. Seeds with the hilum on the margin of the base's surface. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea collina
Moraea collina. Seeds with the hilum on the margin of the base's surface. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea miniata. Seeds with a hilum that is at the intersection of the ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea miniata
Moraea miniata. Seeds with a hilum that is at the intersection of the ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea miniata. Brown seeds with sharp ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea miniata
Moraea miniata. Brown seeds with sharp ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea pallida. Seeds with ridges that are sometimes winged. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea pallida
Moraea pallida. Seeds with ridges that are sometimes winged. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea pallida. Seeds with flat sides that meet sharp ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea pallida
Moraea pallida. Seeds with flat sides that meet sharp ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea polystachya. Seeds with ridges that sometimes have wings. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea polystachya
Moraea polystachya. Seeds with ridges that sometimes have wings. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea polystachya. Seeds with uniform rugose sides and no secondary ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea polystachya
Moraea polystachya. Seeds with uniform rugose sides and no secondary ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea ramosissima. Black seeds with flat sides, sometimes with secondary ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea ramosissima
Moraea ramosissima. Black seeds with flat sides, sometimes with secondary ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea ramosissima. Black seeds with brown ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea ramosissima
Moraea ramosissima. Black seeds with brown ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea schlechteri. Rugose seeds with flat sides that meet with sharp ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea schlechteri
Moraea schlechteri. Rugose seeds with flat sides that meet with sharp ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea schlechteri. Rugose seeds with sharp ridges; the hilum is at the intersection of the three ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea schlechteri
Moraea schlechteri. Rugose seeds with sharp ridges; the hilum is at the intersection of the three ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea schlechteri. Rugose seeds with sharp ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea schlechteri
Moraea schlechteri. Rugose seeds with sharp ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea sp. Seeds with the hilum at the intersection of the three ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Moraea sp.
Moraea sp. Seeds with the hilum at the intersection of the three ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Morella faya. Fruit that is covered with deep, wide, and truncated tubercles.

Morella faya
Morella faya. Fruit that is covered with deep, wide, and truncated tubercles.

Mucuna pruriens var. utilis. Seeds that are light and dark brown mottled, with some white.

Mucuna pruriens var. utilis
Mucuna pruriens var. utilis. Seeds that are light and dark brown mottled, with some white.

Muhlenbergia glomerata. Light brown florets.

Muhlenbergia glomerata
Muhlenbergia glomerata. Light brown florets.

Muhlenbergia glomerata. Light brown florets with a brown caryopsis.

Muhlenbergia glomerata
Muhlenbergia glomerata. Light brown florets with a brown caryopsis.

Muhlenbergia glomerata. Brown caryopses.

Muhlenbergia glomerata
Muhlenbergia glomerata. Brown caryopses.

Muhlenbergia microsperma. Awns that are 10 to 30 mm long.

Muhlenbergia microsperma
Muhlenbergia microsperma. Awns that are 10 to 30 mm long.

Muhlenbergia montana. Florets with a lemma that has a strong central longitudinal rib, which terminates in an awn.

Muhlenbergia montana
Muhlenbergia montana. Florets with a lemma that has a strong central longitudinal rib, which terminates in an awn.

Muhlenbergia rigens. Scabrous florets with appressed hairs on the basal half of the lemma.

Muhlenbergia rigens
Muhlenbergia rigens. Scabrous florets with appressed hairs on the basal half of the lemma.

Muhlenbergia rigens. Scabrous florets with a dark brown caryopsis that can be seen through the palea.

Muhlenbergia rigens
Muhlenbergia rigens. Scabrous florets with a dark brown caryopsis that can be seen through the palea.

Myosotis sylvatica. Seeds with a white and circular hilum at the broad basal end.

Myosotis sylvatica
Myosotis sylvatica. Seeds with a white and circular hilum at the broad basal end.

Nassella cernua. Brown florets with white ends.

Nassella cernua
Nassella cernua. Brown florets with white ends.

Nassella cernua. Brown florets with white ends, and a long and densely bearded callus.

Nassella cernua
Nassella cernua. Brown florets with white ends, and a long and densely bearded callus.

Nassella lepida. Long and sharp callus that is densely bearded.

Nassella lepida
Nassella lepida. Long and sharp callus that is densely bearded.

Nassella lepida. The long geniculate awn arises from the bearded crown-like structure at the apex of the lemma.

Nassella lepida
Nassella lepida. The long geniculate awn arises from the bearded crown-like structure at the apex of the lemma.

Nassella pulchra. Florets with a long and densely bearded callus.

Nassella pulchra
Nassella pulchra. Florets with a long and densely bearded callus.

Nassella pulchra. The long geniculate awn arises from the bearded crown-like structure at the apex of the lemma.

Nassella pulchra
Nassella pulchra. The long geniculate awn arises from the bearded crown-like structure at the apex of the lemma.

Nassella pulchra. Florets with a long and densely bearded callus.

Nassella pulchra
Nassella pulchra. Florets with a long and densely bearded callus.

Nassella trichotoma. The lemma encloses most of the floret and has a long geniculate awn. Photo by Julia Scher, USDA-APHIS-PPQ.

Nassella trichotoma
Nassella trichotoma. The lemma encloses most of the floret and has a long geniculate awn. Photo by Julia Scher, USDA-APHIS-PPQ.

Nassella trichotoma. Long papery glumes enclose a single floret where the lemma has a rough surface. Photo by Julia Scher, USDA-APHIS-PPQ.

Nassella trichotoma
Nassella trichotoma. Long papery glumes enclose a single floret where the lemma has a rough surface. Photo by Julia Scher, USDA-APHIS-PPQ.

Nassella trichotoma. Long papery glumes enclose a single floret. Photo by Julia Scher, USDA-APHIS-PPQ.

Nassella trichotoma
Nassella trichotoma. Long papery glumes enclose a single floret. Photo by Julia Scher, USDA-APHIS-PPQ.

Nassella trichotoma. Brown floret. Photo by Julia Scher, USDA-APHIS-PPQ.

Nassella trichotoma
Nassella trichotoma. Brown floret. Photo by Julia Scher, USDA-APHIS-PPQ.