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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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Sida rhombifolia. True seeds with the hilum between two unequal lobes, and carpel walls are often present.  Sida rhombifolia. True seeds with the hilum between two unequal lobes, and carpel walls are often present. 
Sida rhombifolia
Sida rhombifolia. True seeds with the hilum between two unequal lobes, and carpel walls are often present. 
Sida spinosa. True seeds with a spine on the carpel wall on either side of the opening over the seed hilum.  Sida spinosa. True seeds with a spine on the carpel wall on either side of the opening over the seed hilum. 
Sida spinosa
Sida spinosa. True seeds with a spine on the carpel wall on either side of the opening over the seed hilum. 
Silene antirrhina. True seeds with small pads on either side of the hilum. Silene antirrhina. True seeds with small pads on either side of the hilum.
Silene antirrhina
Silene antirrhina. True seeds with small pads on either side of the hilum.
Silene armeria. True seeds with tubercles that are separated by wavy margins. Silene armeria. True seeds with tubercles that are separated by wavy margins.
Silene armeria
Silene armeria. True seeds with tubercles that are separated by wavy margins.

Silene chalcedonica. True seeds with a deeply inserted hilum. Silene chalcedonica. True seeds with a deeply inserted hilum.
Silene chalcedonica
Silene chalcedonica. True seeds with a deeply inserted hilum.
Silene conoidea. True seeds with black-tipped tubercles that are arranged in rows parallel to the hilum. Silene conoidea. True seeds with black-tipped tubercles that are arranged in rows parallel to the hilum.
Silene conoidea
Silene conoidea. True seeds with black-tipped tubercles that are arranged in rows parallel to the hilum.
Silene csereii. True seeds with a recessed hilum in the concave part of the margin, with small lateral pads. Silene csereii. True seeds with a recessed hilum in the concave part of the margin, with small lateral pads.
Silene csereii
Silene csereii. True seeds with a recessed hilum in the concave part of the margin, with small lateral pads.
Silene dioica. True seeds with a collar surrounding the hilum that extends slightly above the margin edge. Silene dioica. True seeds with a collar surrounding the hilum that extends slightly above the margin edge.
Silene dioica
Silene dioica. True seeds with a collar surrounding the hilum that extends slightly above the margin edge.

Silene gallica. True seeds with tubercles in rows that are elongate and radiating toward the hilum.  Silene gallica. True seeds with tubercles in rows that are elongate and radiating toward the hilum. 
Silene gallica
Silene gallica. True seeds with tubercles in rows that are elongate and radiating toward the hilum. 
Silene latifolia. True seeds with a collar that does not completely surround the hilum. Silene latifolia. True seeds with a collar that does not completely surround the hilum.
Silene latifolia
Silene latifolia. True seeds with a collar that does not completely surround the hilum.
Silene latifolia. True seeds with a circular margin that have a distinct flat side where the hilum is located. Silene latifolia. True seeds with a circular margin that have a distinct flat side where the hilum is located.
Silene latifolia
Silene latifolia. True seeds with a circular margin that have a distinct flat side where the hilum is located.
Silene noctiflora. True seeds with a hilum that is a slit with a collar of two lumps on the sides.  Silene noctiflora. True seeds with a hilum that is a slit with a collar of two lumps on the sides. 
Silene noctiflora
Silene noctiflora. True seeds with a hilum that is a slit with a collar of two lumps on the sides. 

Silene noctiflora. True seeds with large tubercles with no space between them. Silene noctiflora. True seeds with large tubercles with no space between them.
Silene noctiflora
Silene noctiflora. True seeds with large tubercles with no space between them.
Silene pendula. True seeds with tubercles that have black tips and are on rows that are separated by wavy lines. Silene pendula. True seeds with tubercles that have black tips and are on rows that are separated by wavy lines.
Silene pendula
Silene pendula. True seeds with tubercles that have black tips and are on rows that are separated by wavy lines.
Silene vulgaris. Gray true seeds with black tubercle tips. Silene vulgaris. Gray true seeds with black tubercle tips.
Silene vulgaris
Silene vulgaris. Gray true seeds with black tubercle tips.
Silphium laciniantum.  Achene with an indented apical end. Silphium laciniantum.  Achene with an indented apical end.
Silphium laciniatum
Silphium laciniantum.  Achene with an indented apical end.

Silphium perfoliatum. Achenes with an indented apical end. Silphium perfoliatum. Achenes with an indented apical end.
Silphium perfoliatum
Silphium perfoliatum. Achenes with an indented apical end.
Silphium perfoliatum. Achenes with an indented apical end. Silphium perfoliatum. Achenes with an indented apical end.
Silphium perfoliatum
Silphium perfoliatum. Achenes with an indented apical end.
Silphium terebinthinaceum. Achenes with no pappus and a margin that is not always winged. Silphium terebinthinaceum. Achenes with no pappus and a margin that is not always winged.
Silphium terebinthinaceum
Silphium terebinthinaceum. Achenes with no pappus and a margin that is not always winged.
Silybum marianum. Achenes with a collar that is reduced to a minute dark brown rim. Silybum marianum. Achenes with a collar that is reduced to a minute dark brown rim.
Silybum marianum
Silybum marianum. Achenes with a collar that is reduced to a minute dark brown rim.

Sinapis alba.  True seeds with a flush hilum with a round surface. Sinapis alba. True seeds with a flush hilum with a round surface.
Sinapis alba
Sinapis alba. True seeds with a flush hilum with a round surface.
Sinapis arvensis. True seeds with a fine reticulum that may be indistinct or may appear to be lacking, with interspaces very small.  Sinapis arvensis. True seeds with a fine reticulum that may be indistinct or may appear to be lacking, with interspaces very small. 
Sinapis arvensis
Sinapis arvensis. True seeds with a fine reticulum that may be indistinct or may appear to be lacking, with interspaces very small. 
Sinapis arvensis. True seeds with a fine reticulum that may be indistinct or may appear to be lacking, with interspaces very small.  Sinapis arvensis. True seeds with a fine reticulum that may be indistinct or may appear to be lacking, with interspaces very small. 
Sinapis arvensis
Sinapis arvensis. True seeds with a fine reticulum that may be indistinct or may appear to be lacking, with interspaces very small. 
From Left to Right: 1. Brassica nigra 2. Sinapis arvensis 3. Brassica juncea 4. Brassica rapa subsp. campestris .True seeds with a flush hilum with a curved surface. From Left to Right: 1. Brassica nigra 2. Sinapis arvensis 3. Brassica juncea 4. Brassica rapa subsp. campestris.True seeds with a flush hilum with a curved surface.
Sinapis arvensis
From Left to Right: 1. Brassica nigra 2. Sinapis arvensis 3. Brassica juncea 4. Brassica rapa subsp. campestris.True seeds with a flush hilum with a curved surface.

From Left to Right: 1. Brassica nigra 2. Sinapis arvensis 3. Brassica juncea. True seeds that are reticulated. From Left to Right: 1. Brassica nigra 2. Sinapis arvensis 3. Brassica juncea. True seeds that are reticulated.
Sinapis arvensis
From Left to Right: 1. Brassica nigra 2. Sinapis arvensis 3. Brassica juncea. True seeds that are reticulated.
Sinningia speciosa. True seeds that are very irregular, with a hilum that is not easy to see. Sinningia speciosa. True seeds that are very irregular, with a hilum that is not easy to see.
Sinningia speciosa
Sinningia speciosa. True seeds that are very irregular, with a hilum that is not easy to see.
Sisymbrium altissimum. True seeds with a Longitudinal groove between lobes.  Sisymbrium altissimum. True seeds with a Longitudinal groove between lobes. 
Sisymbrium altissimum
Sisymbrium altissimum. True seeds with a Longitudinal groove between lobes. 
From Left to Right: 1. Sisymbrium officinale 2. Sisymbrium altissimum 3. Camelina microcarpa . From Left to Right: 1. Sisymbrium officinale 2.Sisymbrium altissimum 3. Camelina microcarpa.
Sisymbrium altissimum
From Left to Right: 1. Sisymbrium officinale 2.Sisymbrium altissimum 3. Camelina microcarpa.

Sisymbrium loeselii. True seeds that are irregular in shape and have a shiny texture. Sisymbrium loeselii. True seeds that are irregular in shape and have a shiny texture.
Sisymbrium loeselii
Sisymbrium loeselii. True seeds that are irregular in shape and have a shiny texture.
From Left to Right: 1. Sisymbrium officinale 2. Sisymbrium altissimum 3. Camelina microcarpa . From Left to Right: 1. Sisymbrium officinale 2.Sisymbrium altissimum 3. Camelina microcarpa.
Sisymbrium officinale
From Left to Right: 1. Sisymbrium officinale 2.Sisymbrium altissimum 3. Camelina microcarpa.
Sisymbrium officinale. True seeds with margins of cotyledons not distinctly marked with a green line, and color is dark greenish brown. Sisymbrium officinale. True seeds with margins of cotyledons not distinctly marked with a green line, and color is dark greenish brown.
Sisymbrium officinale
Sisymbrium officinale. True seeds with margins of cotyledons not distinctly marked with a green line, and color is dark greenish brown.
Sisyrinchium bellum . True seeds that may be covered with reticulations. Sisyrinchium bellum. True seeds that may be covered with reticulations.
Sisyrinchium bellum
Sisyrinchium bellum. True seeds that may be covered with reticulations.

Solanum americanum. True seeds with a fine reticulum and a hilum that protrudes beyond the margin. Solanum americanum. True seeds with a fine reticulum and a hilum that protrudes beyond the margin.
Solanum americanum
Solanum americanum. True seeds with a fine reticulum and a hilum that protrudes beyond the margin.
From Left to Right: 1. Solanum carolinense 2. Solanum elaeagnifolium. From Left to Right: 1. Solanum carolinense 2. Solanum elaeagnifolium.
Solanum carolinense
From Left to Right: 1. Solanum carolinense 2. Solanum elaeagnifolium.
Solanum carolinense. True seeds with leathery surfaces. Solanum carolinense. True seeds with leathery surfaces.
Solanum carolinense
Solanum carolinense. True seeds with leathery surfaces.
Solanum dulcamara. True seeds that are somewhat elongate, and the hilum extends beyond the margin.  Solanum dulcamara. True seeds that are somewhat elongate, and the hilum extends beyond the margin. 
Solanum dulcamara
Solanum dulcamara. True seeds that are somewhat elongate, and the hilum extends beyond the margin. 

Solanum elaeagnifolium. True seeds that tend to have a twist in their entire structure.  Solanum elaeagnifolium. True seeds that tend to have a twist in their entire structure. 
Solanum elaeagnifolium
Solanum elaeagnifolium. True seeds that tend to have a twist in their entire structure. 
From Left to Right:  1. Solanum carolinense 2. Solanum elaegnifolium. From Left to Right:  1. Solanum carolinense 2. Solanum elaegnifolium.
Solanum elaeagnifolium
From Left to Right:  1. Solanum carolinense 2. Solanum elaegnifolium.
Solanum interius. True seeds that are light colored and the reticulation is not strong.   Solanum interius. True seeds that are light colored and the reticulation is not strong.  
Solanum interius
Solanum interius. True seeds that are light colored and the reticulation is not strong.  
Solanum lycopersicum. True seeds that are very light colored and covered with matted, silky hairs. Solanum lycopersicum. True seeds that are very light colored and covered with matted, silky hairs.
Solanum lycopersicum
Solanum lycopersicum. True seeds that are very light colored and covered with matted, silky hairs.