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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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Solanum melongena. True seeds that are strongly reticulated with a wide hilum that is wide and deeply indented into the margin.  Solanum melongena. True seeds that are strongly reticulated with a wide hilum that is wide and deeply indented into the margin. 
Solanum melongena
Solanum melongena. True seeds that are strongly reticulated with a wide hilum that is wide and deeply indented into the margin. 
From Left to Right: 1. Solanum nigrum 2. 3. Physalis sp. The photo shows the size relationship between Solanum nigrum and other Physalis species . Hilum protrudes in sp. Nigrum and is not indented as in Physalis sp. From Left to Right: 1. Solanum nigrum 2. & 3. Physalis sp. The photo shows the size relationship between Solanum nigrum and other Physalis species. Hilum protrudes in sp. Nigrum and is not indented as in Physalis sp.
Solanum nigrum
From Left to Right: 1. Solanum nigrum 2. & 3. Physalis sp. The photo shows the size relationship between Solanum nigrum and other Physalis species. Hilum protrudes in sp. Nigrum and is not indented as in Physalis sp.
Solanum nigrum. Top, middle- embryo exposed. Solanum nigrum. Top, middle- embryo exposed.
Solanum nigrum
Solanum nigrum. Top, middle- embryo exposed.
Solanum physalifolium. True seeds with bases within the reticulations that are shiny. Solanum physalifolium. True seeds with bases within the reticulations that are shiny.
Solanum physalifolium
Solanum physalifolium. True seeds with bases within the reticulations that are shiny.

Solanum physalifolium. True seeds with the Hilum slightly protruding from the margin.  Solanum physalifolium. True seeds with the Hilum slightly protruding from the margin. 
Solanum physalifolium
Solanum physalifolium. True seeds with the Hilum slightly protruding from the margin. 
Solanum ptychanthum. True seeds that are very light colored and small, with a hilum that extends beyond the margin, and the seed is strongly reticulated.  Solanum ptychanthum. True seeds that are very light colored and small, with a hilum that extends beyond the margin, and the seed is strongly reticulated. 
Solanum ptychanthum
Solanum ptychanthum. True seeds that are very light colored and small, with a hilum that extends beyond the margin, and the seed is strongly reticulated. 
Solanum rostratum. True seeds with the margin opposite of the hilum and are moderately wavy but laterally square.  Solanum rostratum. True seeds with the margin opposite of the hilum and are moderately wavy but laterally square. 
Solanum rostratum
Solanum rostratum. True seeds with the margin opposite of the hilum and are moderately wavy but laterally square. 
From Left to Right:  1. Quincula lobata 2. Solanum rostratum . From Left to Right:  1. Quincula lobata 2. Solanum rostratum.
Solanum rostratum
From Left to Right:  1. Quincula lobata 2. Solanum rostratum.

Solanum tampicense. True seeds with the shape often modified by an exaggerated hilum margin. Photo by Julia Scher, USDA-APHIS-PPQ. Solanum tampicense. True seeds with the shape often modified by an exaggerated hilum margin. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum tampicense
Solanum tampicense. True seeds with the shape often modified by an exaggerated hilum margin. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum tampicense. True seeds with the shape often modified by an exaggerated hilum margin. Photo by Julia Scher, USDA-APHIS-PPQ. Solanum tampicense. True seeds with the shape often modified by an exaggerated hilum margin. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum tampicense
Solanum tampicense. True seeds with the shape often modified by an exaggerated hilum margin. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum tampicense. True seeds that are reticulate. Photo by Julia Scher, USDA-APHIS-PPQ. Solanum tampicense. True seeds that are reticulate. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum tampicense
Solanum tampicense. True seeds that are reticulate. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum tampicense. True seeds that are reticulate. Photo by Julia Scher, USDA-APHIS-PPQ. Solanum tampicense. True seeds that are reticulate. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum tampicense
Solanum tampicense. True seeds that are reticulate. Photo by Julia Scher, USDA-APHIS-PPQ.

Solanum torvum. True seeds with a reticulum that is present at various intensities. Solanum torvum. True seeds with a reticulum that is present at various intensities.
Solanum torvum
Solanum torvum. True seeds with a reticulum that is present at various intensities.
Solanum torvum. True seeds with a hilum that is in line with the margin are slightly below. Photo by Julia Scher, USDA-APHIS-PPQ. Solanum torvum. True seeds with a hilum that is in line with the margin are slightly below. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum torvum
Solanum torvum. True seeds with a hilum that is in line with the margin are slightly below. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum torvum. True seeds with a hilum that is in line with the margin are slightly below. Photo by Julia Scher, USDA-APHIS-PPQ. Solanum torvum. True seeds with a hilum that is in line with the margin are slightly below. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum torvum
Solanum torvum. True seeds with a hilum that is in line with the margin are slightly below. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum torvum. True seeds with a present reticulum, but at various intensities. Photo by Julia Scher, USDA-APHIS-PPQ. Solanum torvum. True seeds with a present reticulum, but at various intensities. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum torvum
Solanum torvum. True seeds with a present reticulum, but at various intensities. Photo by Julia Scher, USDA-APHIS-PPQ.

Solanum torvum. True seeds with a present reticulum, but at various intensities. Photo by Julia Scher, USDA-APHIS-PPQ. Solanum torvum. True seeds with a present reticulum, but at various intensities. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum torvum
Solanum torvum. True seeds with a present reticulum, but at various intensities. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum triflorum. True seeds with stipple bases that are not uniformly shiny. Solanum triflorum. True seeds with stipple bases that are not uniformly shiny.
Solanum triflorum
Solanum triflorum. True seeds with stipple bases that are not uniformly shiny.
Solanum tuberosum. True seeds with an indentation following near the margin.  Solanum tuberosum. True seeds with an indentation following near the margin. 
Solanum tuberosum
Solanum tuberosum. True seeds with an indentation following near the margin. 
Solanum viarum. True seeds with a hilum, that is a slight indentation on the margin. Solanum viarum. True seeds with a hilum, that is a slight indentation on the margin.
Solanum viarum
Solanum viarum. True seeds with a hilum, that is a slight indentation on the margin.

Solanum viarum. True seeds with an exceptionally textured reticulum. Photo by Julia Scher, USDA-APHIS-PPQ. Solanum viarum. True seeds with an exceptionally textured reticulum. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum viarum
Solanum viarum. True seeds with an exceptionally textured reticulum. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum viarum. True seeds with an exceptionally textured reticulum. Photo by Julia Scher, USDA-APHIS-PPQ. Solanum viarum. True seeds with an exceptionally textured reticulum. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum viarum
Solanum viarum. True seeds with an exceptionally textured reticulum. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum viarum. True seeds with a slight indentation on the margin, which is the hilum. Photo by Julia Scher, USDA-APHIS-PPQ. Solanum viarum. True seeds with a slight indentation on the margin, which is the hilum. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum viarum
Solanum viarum. True seeds with a slight indentation on the margin, which is the hilum. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum viarum. True seeds with a slight indentation on the margin, which is the hilum. Photo by Julia Scher, USDA-APHIS-PPQ. Solanum viarum. True seeds with a slight indentation on the margin, which is the hilum. Photo by Julia Scher, USDA-APHIS-PPQ.
Solanum viarum
Solanum viarum. True seeds with a slight indentation on the margin, which is the hilum. Photo by Julia Scher, USDA-APHIS-PPQ.

Solenostemon scutellarioides
Solidago altissima. Hairy achenes with a dense pappus.  Solidago altissima. Hairy achenes with a dense pappus. 
Solidago altissima
Solidago altissima. Hairy achenes with a dense pappus. 
Sonchus arvensis. Oblong achenes. Photo by Julia Scher, USDA-APHIS-PPQ. Sonchus arvensis. Oblong achenes. Photo by Julia Scher, USDA-APHIS-PPQ.
Sonchus arvensis
Sonchus arvensis. Oblong achenes. Photo by Julia Scher, USDA-APHIS-PPQ.
Sonchus arvensis. Achenes with a broad pappus and basal attachment. Photo by Julia Scher, USDA-APHIS-PPQ. Sonchus arvensis. Achenes with a broad pappus and basal attachment. Photo by Julia Scher, USDA-APHIS-PPQ.
Sonchus arvensis
Sonchus arvensis. Achenes with a broad pappus and basal attachment. Photo by Julia Scher, USDA-APHIS-PPQ.

Sonchus arvensis. Achenes with about five longitudinal ridges with deep and narrow creases between ridges. Photo by Julia Scher, USDA-APHIS-PPQ. Sonchus arvensis. Achenes with about five longitudinal ridges with deep and narrow creases between ridges. Photo by Julia Scher, USDA-APHIS-PPQ.
Sonchus arvensis
Sonchus arvensis. Achenes with about five longitudinal ridges with deep and narrow creases between ridges. Photo by Julia Scher, USDA-APHIS-PPQ.
Sonchus arvensis. Achenes with a broad pappus and basal attachment. Photo by Julia Scher, USDA-APHIS-PPQ. Sonchus arvensis. Achenes with a broad pappus and basal attachment. Photo by Julia Scher, USDA-APHIS-PPQ.
Sonchus arvensis
Sonchus arvensis. Achenes with a broad pappus and basal attachment. Photo by Julia Scher, USDA-APHIS-PPQ.
Sonchus arvensis. Achenes with about five longitudinal ridges with deep and narrow creases between ridges. Photo by Julia Scher, USDA-APHIS-PPQ. Sonchus arvensis. Achenes with about five longitudinal ridges with deep and narrow creases between ridges. Photo by Julia Scher, USDA-APHIS-PPQ.
Sonchus arvensis
Sonchus arvensis. Achenes with about five longitudinal ridges with deep and narrow creases between ridges. Photo by Julia Scher, USDA-APHIS-PPQ.
Sonchus arvensis. Achenes with Longitudinal ribs that are truncated at the base and apex.  Sonchus arvensis. Achenes with Longitudinal ribs that are truncated at the base and apex. 
Sonchus arvensis
Sonchus arvensis. Achenes with Longitudinal ribs that are truncated at the base and apex. 

Sonchus asper. Achenes with about three narrow, wide-spaced longitudinal ridges with a flat area between ridges with no reticulations. Sonchus asper. Achenes with about three narrow, wide-spaced longitudinal ridges with a flat area between ridges with no reticulations.
Sonchus asper
Sonchus asper. Achenes with about three narrow, wide-spaced longitudinal ridges with a flat area between ridges with no reticulations.
Sonchus oleraceus. Achenes that are yellow to brown in color. Photo by Julia Scher, USDA-APHIS-PPQ. Sonchus oleraceus. Achenes that are yellow to brown in color. Photo by Julia Scher, USDA-APHIS-PPQ.
Sonchus oleraceus
Sonchus oleraceus. Achenes that are yellow to brown in color. Photo by Julia Scher, USDA-APHIS-PPQ.
Sonchus oleraceus. Achenes with about four longitudinal ribs, with line width and interspaces about equal. Photo by Julia Scher, USDA-APHIS-PPQ. Sonchus oleraceus. Achenes with about four longitudinal ribs, with line width and interspaces about equal. Photo by Julia Scher, USDA-APHIS-PPQ.
Sonchus oleraceus
Sonchus oleraceus. Achenes with about four longitudinal ribs, with line width and interspaces about equal. Photo by Julia Scher, USDA-APHIS-PPQ.
Sonchus oleraceus. Achenes with strong cross-reticulations on both the ribs and interspaces. Photo by Julia Scher, USDA-APHIS-PPQ. Sonchus oleraceus. Achenes with strong cross-reticulations on both the ribs and interspaces. Photo by Julia Scher, USDA-APHIS-PPQ.
Sonchus oleraceus
Sonchus oleraceus. Achenes with strong cross-reticulations on both the ribs and interspaces. Photo by Julia Scher, USDA-APHIS-PPQ.

Sonchus oleraceus. Achenes with longitudinal ribs, bases, and a narrow apex.  Sonchus oleraceus. Achenes with longitudinal ribs, bases, and a narrow apex. 
Sonchus oleraceus
Sonchus oleraceus. Achenes with longitudinal ribs, bases, and a narrow apex. 
From Left to Right: 1. Andropogon gerardii 2. Andropogon hallii 3. Sorghastrum nutans 4. Schizachyrium scoparium 5.  Bothriochloa ischaemum.   From Left to Right: 1. Andropogon gerardii 2. Andropogon hallii 3. Sorghastrum nutans 4. Schizachyrium scoparium 5. Bothriochloa ischaemum. 
Sorghastrum nutans
From Left to Right: 1. Andropogon gerardii 2. Andropogon hallii 3. Sorghastrum nutans 4. Schizachyrium scoparium 5. Bothriochloa ischaemum. 
Sorghastrum nutans . The thin and narrow rachis segment and pedicel is useful for identification. Sorghastrum nutans. The thin and narrow rachis segment and pedicel is useful for identification.
Sorghastrum nutans
Sorghastrum nutans. The thin and narrow rachis segment and pedicel is useful for identification.
Sorghum.  Yellow to black spikelets. Sorghum. Yellow to black spikelets.
Sorghum
Sorghum. Yellow to black spikelets.