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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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Lupinus albicaulis. Seeds with a black band circling the hilum. Lupinus albicaulis. Seeds with a black band circling the hilum.
Lupinus albicaulis
Lupinus albicaulis. Seeds with a black band circling the hilum.
Lupinus albus. Seeds with some indentations on the surface. Lupinus albus. Seeds with some indentations on the surface.
Lupinus albus
Lupinus albus. Seeds with some indentations on the surface.
Lupinus argenteus. Seeds with a conspicuous hilum with a high collar surrounding it.   Lupinus argenteus. Seeds with a conspicuous hilum with a high collar surrounding it.  
Lupinus argenteus
Lupinus argenteus. Seeds with a conspicuous hilum with a high collar surrounding it.  
Lupinus argenteus ssp. rubricaulis. Seeds with white and black mottling. Lupinus argenteus ssp. rubricaulis. Seeds with white and black mottling.
Lupinus argenteus subsp. rubricaulis
Lupinus argenteus ssp. rubricaulis. Seeds with white and black mottling.

Lupinus argenteus ssp. rubricaulis. Seeds with an off-center at base. Lupinus argenteus ssp. rubricaulis. Seeds with an off-center at base.
Lupinus argenteus subsp. rubricaulis
Lupinus argenteus ssp. rubricaulis. Seeds with an off-center at base.
Lupinus arizonicus. Seeds with an off-center hilum at the base. Lupinus arizonicus. Seeds with an off-center hilum at the base.
Lupinus arizonicus
Lupinus arizonicus. Seeds with an off-center hilum at the base.
Lupinus confertus. Seeds with brown and white mottling. Lupinus confertus. Seeds with brown and white mottling.
Lupinus confertus
Lupinus confertus. Seeds with brown and white mottling.
Lupinus densiflorus var. densiflorus. Seeds with color that includes a black band circling the hilum. Lupinus densiflorus var. densiflorus. Seeds with color that includes a black band circling the hilum.
Lupinus densiflorus var. densiflorus
Lupinus densiflorus var. densiflorus. Seeds with color that includes a black band circling the hilum.

Lupinus perennis. Seeds with a pointed radicle lobe at the hilum area. Lupinus perennis. Seeds with a pointed radicle lobe at the hilum area.
Lupinus perennis
Lupinus perennis. Seeds with a pointed radicle lobe at the hilum area.
Lupinus polyphyllus. Black and brown mottled seeds. Lupinus polyphyllus. Black and brown mottled seeds.
Lupinus polyphyllus
Lupinus polyphyllus. Black and brown mottled seeds.
Lupinus polyphyllus. Seeds with a slightly raised circular hilum at the base. Lupinus polyphyllus. Seeds with a slightly raised circular hilum at the base.
Lupinus polyphyllus
Lupinus polyphyllus. Seeds with a slightly raised circular hilum at the base.
Lupinus sparsiflorus. Seeds with some white and yellow streaks in the mottling. Lupinus sparsiflorus. Seeds with some white and yellow streaks in the mottling.
Lupinus sparsiflorus
Lupinus sparsiflorus. Seeds with some white and yellow streaks in the mottling.

Lupinus succulentus. Seeds with black mottling that tend to form lines and a network.  Lupinus succulentus. Seeds with black mottling that tend to form lines and a network. 
Lupinus succulentus
Lupinus succulentus. Seeds with black mottling that tend to form lines and a network. 
Lupinus texensis. Seeds with a black portion of the mottling that are often composed of tiny dots.  Lupinus texensis. Seeds with a black portion of the mottling that are often composed of tiny dots. 
Lupinus texensis
Lupinus texensis. Seeds with a black portion of the mottling that are often composed of tiny dots. 
Lycium ferocissimum. Seeds are not totally flat; they have a small twist. Photo by Julia Scher, USDA-APHIS-PPQ. Lycium ferocissimum. Seeds are not totally flat; they have a small twist. Photo by Julia Scher, USDA-APHIS-PPQ.
Lycium ferocissimum
Lycium ferocissimum. Seeds are not totally flat; they have a small twist. Photo by Julia Scher, USDA-APHIS-PPQ.
Lycium ferocissimum. Seeds are not totally flat; they have a small twist. Photo by Julia Scher, USDA-APHIS-PPQ. Lycium ferocissimum. Seeds are not totally flat; they have a small twist. Photo by Julia Scher, USDA-APHIS-PPQ.
Lycium ferocissimum
Lycium ferocissimum. Seeds are not totally flat; they have a small twist. Photo by Julia Scher, USDA-APHIS-PPQ.

Lycium ferocissimum. Rugose seeds that are not totally flat; they have a small twist. Photo by Julia Scher, USDA-APHIS-PPQ. Lycium ferocissimum. Rugose seeds that are not totally flat; they have a small twist. Photo by Julia Scher, USDA-APHIS-PPQ.
Lycium ferocissimum
Lycium ferocissimum. Rugose seeds that are not totally flat; they have a small twist. Photo by Julia Scher, USDA-APHIS-PPQ.
Lycium ferocissimum. Rugose seeds surface. Photo by Julia Scher, USDA-APHIS-PPQ. Lycium ferocissimum. Rugose seeds surface. Photo by Julia Scher, USDA-APHIS-PPQ.
Lycium ferocissimum
Lycium ferocissimum. Rugose seeds surface. Photo by Julia Scher, USDA-APHIS-PPQ.
Lycium ferocissimum. Seed hilum. Photo by Julia Scher, USDA-APHIS-PPQ. Lycium ferocissimum. Seed hilum. Photo by Julia Scher, USDA-APHIS-PPQ.
Lycium ferocissimum
Lycium ferocissimum. Seed hilum. Photo by Julia Scher, USDA-APHIS-PPQ.
Lycium ferocissimum.  Berries. Photo by Julia Scher, USDA-APHIS-PPQ. Lycium ferocissimum. Berries. Photo by Julia Scher, USDA-APHIS-PPQ.
Lycium ferocissimum
Lycium ferocissimum. Berries. Photo by Julia Scher, USDA-APHIS-PPQ.

Lycium sp. Seeds with a circular hilum on the seed margin. Lycium sp. Seeds with a circular hilum on the seed margin.
Lycium sp.
Lycium sp. Seeds with a circular hilum on the seed margin.
Lythrum salicaria. Seeds that are glossy despite their rough outer texture.  Lythrum salicaria. Seeds that are glossy despite their rough outer texture. 
Lythrum salicaria
Lythrum salicaria. Seeds that are glossy despite their rough outer texture. 
Lythrum virgatum. Reddish-brown seeds with minutely rectangular reticulations. Lythrum virgatum. Reddish-brown seeds with minutely rectangular reticulations.
Lythrum virgatum
Lythrum virgatum. Reddish-brown seeds with minutely rectangular reticulations.
Machaeranthera tanacetifolia. Achenes with sparse short hairs and the pappus crown is within the margin line. Machaeranthera tanacetifolia. Achenes with sparse short hairs and the pappus crown is within the margin line.
Machaeranthera tanacetifolia
Machaeranthera tanacetifolia. Achenes with sparse short hairs and the pappus crown is within the margin line.

Madia sativa.  White to light brown achenes that are mottled with black. Madia sativa. White to light brown achenes that are mottled with black.
Madia sativa
Madia sativa. White to light brown achenes that are mottled with black.
Madia sativa. Achenes are obovoid and bent with one side convex and the other concave. Madia sativa. Achenes are obovoid and bent with one side convex and the other concave.
Madia sativa
Madia sativa. Achenes are obovoid and bent with one side convex and the other concave.
Mahonia repens.  Stippled seeds with two flat surfaces on the ventral side with a longitudinal rib between. Mahonia repens. Stippled seeds with two flat surfaces on the ventral side with a longitudinal rib between.
Mahonia repens
Mahonia repens. Stippled seeds with two flat surfaces on the ventral side with a longitudinal rib between.
Malachra alceifolia. Seeds enveloped in carpel walls, where the carpel wall is open in the area of the seed hilum.  Malachra alceifolia. Seeds enveloped in carpel walls, where the carpel wall is open in the area of the seed hilum. 
Malachra alceifolia
Malachra alceifolia. Seeds enveloped in carpel walls, where the carpel wall is open in the area of the seed hilum. 

Malcolmia maritima. Seeds with very visible grooves separating the radicle and cotyledon lobes. Malcolmia maritima. Seeds with very visible grooves separating the radicle and cotyledon lobes.
Malcolmia maritima
Malcolmia maritima. Seeds with very visible grooves separating the radicle and cotyledon lobes.
Malva parviflora. Seeds within a carpel that have ribs radiating outward from the hilum area.  Malva parviflora. Seeds within a carpel that have ribs radiating outward from the hilum area. 
Malva parviflora
Malva parviflora. Seeds within a carpel that have ribs radiating outward from the hilum area. 
Malva pusilla. Seeds with carpels that have moderately reticulate walls with hispid hairs and thin ridges following the margin lines.  Malva pusilla. Seeds with carpels that have moderately reticulate walls with hispid hairs and thin ridges following the margin lines. 
Malva pusilla
Malva pusilla. Seeds with carpels that have moderately reticulate walls with hispid hairs and thin ridges following the margin lines. 
Malva verticillata.  Carpels are conspicuously transversely ridged. Malva verticillata. Carpels are conspicuously transversely ridged.
Malva verticillata
Malva verticillata. Carpels are conspicuously transversely ridged.

Malvella leprosa. Carpels with the hilum in a cleft, and the radicle lobe is narrower and longer than the cotyledon lobe.  Malvella leprosa. Carpels with the hilum in a cleft, and the radicle lobe is narrower and longer than the cotyledon lobe. 
Malvella leprosa
Malvella leprosa. Carpels with the hilum in a cleft, and the radicle lobe is narrower and longer than the cotyledon lobe. 
Malvella leprosa. The seeds are oval and laterally wedged, with a flat caruncle covering the hilum. Malvella leprosa. The seeds are oval and laterally wedged, with a flat caruncle covering the hilum.
Malvella leprosa
Malvella leprosa. The seeds are oval and laterally wedged, with a flat caruncle covering the hilum.
Malvella leprosa. Carpels with a compressed seed, with one side being narrower than the other.  Malvella leprosa. Carpels with a compressed seed, with one side being narrower than the other. 
Malvella leprosa
Malvella leprosa. Carpels with a compressed seed, with one side being narrower than the other. 
Marrubium vulgare. Nutlets that are black and yellow mottled, with two flat surfaces on the ventral side, with a ridge in between.  Marrubium vulgare. Nutlets that are black and yellow mottled, with two flat surfaces on the ventral side, with a ridge in between. 
Marrubium vulgare
Marrubium vulgare. Nutlets that are black and yellow mottled, with two flat surfaces on the ventral side, with a ridge in between. 

Matricaria recutita. Achenes with large longitudinal ribs on one side and small ribs on the other.  Matricaria recutita. Achenes with large longitudinal ribs on one side and small ribs on the other. 
Matricaria recutita
Matricaria recutita. Achenes with large longitudinal ribs on one side and small ribs on the other. 
Matthiola incana.  Seeds with a strong groove between the radicle and cotyledon lobes. Matthiola incana. Seeds with a strong groove between the radicle and cotyledon lobes.
Matthiola incana
Matthiola incana. Seeds with a strong groove between the radicle and cotyledon lobes.
Maurandya scandens.  True seeds with a surface covered in large tubercles. Maurandya scandens. True seeds with a surface covered in large tubercles.
Maurandya scandens
Maurandya scandens. True seeds with a surface covered in large tubercles.
Medicago lupulina. Smooth yellow seeds with a green and black pod that has nerves in concentric lines. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences. Medicago lupulina. Smooth yellow seeds with a green and black pod that has nerves in concentric lines. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.
Medicago lupulina
Medicago lupulina. Smooth yellow seeds with a green and black pod that has nerves in concentric lines. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.