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

per page:	page:
	of 59

Calamintha nepeta. Seeds have a scurfy surface surrounding closely spaced tubercles, with a white, V-shaped hilum.

Calamintha nepeta
Calamintha nepeta. Seeds have a scurfy surface surrounding closely spaced tubercles, with a white, V-shaped hilum.

Calamovilfa longifolia. Florets with a tuft of long, silky hair protruding laterally from the callus.

Calamovilfa longifolia
Calamovilfa longifolia. Florets with a tuft of long, silky hair protruding laterally from the callus.

Calendula sp. Achenes with a recurved base.

Calendula sp.
Calendula sp. Achenes with a recurved base.

Callirhoe involucrata. Mericarps with deep reticulations on the sides and the back.

Callirhoe involucrata
Callirhoe involucrata. Mericarps with deep reticulations on the sides and the back.

Callistephus chinensis. Achenes are brown with darker blotches or yellow.

Callistephus chinensis
Callistephus chinensis. Achenes are brown with darker blotches or yellow.

Callistephus chinensis. Achenes with sparse, coarse, and appressed hairs.

Callistephus chinensis
Callistephus chinensis. Achenes with sparse, coarse, and appressed hairs.

Calochortus gunnisonii. Seeds and achenes. Achene coat is transparent, fragile, and reticulated.

Calochortus gunnisonii
Calochortus gunnisonii. Seeds and achenes. Achene coat is transparent, fragile, and reticulated.

Calystegia sepium. Dark gray seeds with two flat surfaces adjacent to each other.

Calystegia sepium
Calystegia sepium. Dark gray seeds with two flat surfaces adjacent to each other.

From Left to Right: 1. Convolvulus equitans 2. Calystegia sepium 3. Convolvulus arvensis. Smooth seeds.

Calystegia sepium
From Left to Right: 1. Convolvulus equitans 2. Calystegia sepium 3. Convolvulus arvensis. Smooth seeds.

From Left to Right: 1. Ipomea hederacea 2. Ipomea purpurea 3. Calystegia sepium 4. Convolvulus arvensis 5. Convolvulus equitans 6. Jacquemontia tamnifolia. Seeds with two flat surfaces adjacent to each other.

Calystegia sepium
From Left to Right: 1. Ipomea hederacea 2. Ipomea purpurea 3. Calystegia sepium 4. Convolvulus arvensis 5. Convolvulus equitans 6. Jacquemontia tamnifolia. Seeds with two flat surfaces adjacent to each other.

Camelina macrocarpa. Finely reticulate seeds with twisted radicle lobes.

Camelina microcarpa
Camelina macrocarpa. Finely reticulate seeds with twisted radicle lobes.

From Left to Right: 1. Sisymbrium officinale 2. Sisymbrium altissimum 3. Camelina microcarpa. Seeds with a thick cotyledon lobe.

Camelina microcarpa
From Left to Right: 1. Sisymbrium officinale 2. Sisymbrium altissimum 3. Camelina microcarpa. Seeds with a thick cotyledon lobe.

Camelina sativa. Rough, brown seeds are pictured with pods.

Camelina sativa
Camelina sativa. Rough, brown seeds are pictured with pods.

Camissonia brevipes. Seeds with a slightly winged margin.

Camissonia brevipes
Camissonia brevipes. Seeds with a slightly winged margin.

Campanula carpatica. Finely reticulated, shiny seeds.

Campanula carpatica
Campanula carpatica. Finely reticulated, shiny seeds.

Campanula medium. Seeds are shiny with minute rectangular reticulations.

Campanula medium
Campanula medium. Seeds are shiny with minute rectangular reticulations.

Campanula rapunculoides. Shiny seeds with dark brown centers and light brown edges.

Campanula rapunculoides
Campanula rapunculoides. Shiny seeds with dark brown centers and light brown edges.

Canna sp. Seeds are shiny with small, circular, spaced indentations.

Canna sp.
Canna sp. Seeds are shiny with small, circular, spaced indentations.

Cannabis sativa. Achenes are yellow to brown with light veins and dark blotches.

Cannabis sativa
Cannabis sativa. Achenes are yellow to brown with light veins and dark blotches.

Caperonia castaneifolia. Seeds are gray-brown to green-brown with light and dark flecks.

Caperonia castaneifolia
Caperonia castaneifolia. Seeds are gray-brown to green-brown with light and dark flecks.

From Left to Right: 1. Descurania sophia 2. Descurania pinnata 3. Capsella brusa-pastoris.

Capsella bursa-pastoris
From Left to Right: 1. Descurania sophia 2. Descurania pinnata 3. Capsella brusa-pastoris.

Capsella bursa-pastoris. Seeds with a radicle lobe outlined on one margin with two cotyledons on the other.

Capsella bursa-pastoris
Capsella bursa-pastoris. Seeds with a radicle lobe outlined on one margin with two cotyledons on the other.

Capsicum annuum. Yellow seeds with a triangular hilum protruding from the margin of the seed.

Capsicum annuum
Capsicum annuum. Yellow seeds with a triangular hilum protruding from the margin of the seed.

Capsicum sp. Hilum area. Photo by Norma Diaz, USDA-APHIS-PPQ.

Capsicum annuum
Capsicum sp. Hilum area. Photo by Norma Diaz, USDA-APHIS-PPQ.

Cardaria chalepensis. Seeds with round, inflated pods.

Cardaria chalepensis
Cardaria chalepensis. Seeds with round, inflated pods.

Cardaria draba. Seed with a pointed hilum end.

Cardaria draba
Cardaria draba. Seed with a pointed hilum end.

Cardaria draba. The silique is an inverted heart shape with a single seed on each side. A straight line separates the embryo lobes.

Cardaria draba
Cardaria draba. The silique is an inverted heart shape with a single seed on each side. A straight line separates the embryo lobes.

Cardaria draba. Silique inverted heart shape. Photo by Julia Scher, USDA-APHIS-PPQ.

Cardaria draba
Cardaria draba. Silique inverted heart shape. Photo by Julia Scher, USDA-APHIS-PPQ.

Cardaria draba. The hilum end is more pointed, and the apical end is rounded. Photo by Julia Scher, USDA-APHIS-PPQ.

Cardaria draba
Cardaria draba. The hilum end is more pointed, and the apical end is rounded. Photo by Julia Scher, USDA-APHIS-PPQ.

Cardaria draba. Seeds. Photo by Julia Scher, USDA-APHIS-PPQ.

Cardaria draba
Cardaria draba. Seeds. Photo by Julia Scher, USDA-APHIS-PPQ.

Cardaria draba. Seeds. Photo by Julia Scher, USDA-APHIS-PPQ.

Cardaria draba
Cardaria draba. Seeds. Photo by Julia Scher, USDA-APHIS-PPQ.

Cardaria pubescens. Seeds are compressed ovals. Photo by Julia Scher, USDA-APHIS-PPQ.

Cardaria pubescens
Cardaria pubescens. Seeds are compressed ovals. Photo by Julia Scher, USDA-APHIS-PPQ.

Cardaria pubescens. Seed hilum. Photo by Julia Scher, USDA-APHIS-PPQ.

Cardaria pubescens
Cardaria pubescens. Seed hilum. Photo by Julia Scher, USDA-APHIS-PPQ.

Cardaria pubescens. Seeds with a ball-shaped silique. Photo by Julia Scher, USDA-APHIS-PPQ.

Cardaria pubescens
Cardaria pubescens. Seeds with a ball-shaped silique. Photo by Julia Scher, USDA-APHIS-PPQ.

Cardaria pubescens. Seeds with a strong line separating the radicle and cotyledon lobes. Photo by Julia Scher, USDA-APHIS-PPQ.

Cardaria pubescens
Cardaria pubescens. Seeds with a strong line separating the radicle and cotyledon lobes. Photo by Julia Scher, USDA-APHIS-PPQ.

Cardaria pubescens. Seeds with ball-shaped siliques.

Cardaria pubescens
Cardaria pubescens. Seeds with ball-shaped siliques.

Cardiospermum halicacabum. Black seeds with a very conspicuous white, heart-shaped hilum.

Cardiospermum halicacabum
Cardiospermum halicacabum. Black seeds with a very conspicuous white, heart-shaped hilum.

Cardiospermum halicacabum. Seeds with a very conspicuous white, heart-shaped hilum.

Cardiospermum halicacabum
Cardiospermum halicacabum. Seeds with a very conspicuous white, heart-shaped hilum.