ITP Logo

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     


Agastache foeniculum.  Oval seeds with two flat surfaces. Agastache foeniculum. Oval seeds with two flat surfaces.
Agastache foeniculum
Agastache foeniculum. Oval seeds with two flat surfaces.
Agastache foeniculum.  Seeds are nutlets with a glandular texture. Agastache foeniculum. Seeds are nutlets with a glandular texture.
Agastache foeniculum
Agastache foeniculum. Seeds are nutlets with a glandular texture.
Ageratina adenophora.  Achenes. Ageratina adenophora. Achenes.
Ageratina adenophora
Ageratina adenophora. Achenes.
Ageratina adenophora.  Linear achenes with white barbed pappus. Ageratina adenophora. Linear achenes with white barbed pappus.
Ageratina adenophora
Ageratina adenophora. Linear achenes with white barbed pappus.

Ageratina adenophora.  Striate texture with small rectangular boxes. Photo by Julia Scher, USDA-APHIS-PPQ. Ageratina adenophora. Striate texture with small rectangular boxes. Photo by Julia Scher, USDA-APHIS-PPQ.
Ageratina adenophora
Ageratina adenophora. Striate texture with small rectangular boxes. Photo by Julia Scher, USDA-APHIS-PPQ.
Ageratina adenophora.  Linear achenes. Photo by Julia Scher, USDA-APHIS-PPQ. Ageratina adenophora. Linear achenes. Photo by Julia Scher, USDA-APHIS-PPQ.
Ageratina adenophora
Ageratina adenophora. Linear achenes. Photo by Julia Scher, USDA-APHIS-PPQ.
Ageratina adenophora. Achenes with white barbed pappus. Photo by Julia Scher, USDA-APHIS-PPQ. Ageratina adenophora. Achenes with white barbed pappus. Photo by Julia Scher, USDA-APHIS-PPQ.
Ageratina adenophora
Ageratina adenophora. Achenes with white barbed pappus. Photo by Julia Scher, USDA-APHIS-PPQ.
Ageratina adenophora.  Oval base of the achene .  Photo by Julia Scher, USDA-APHIS-PPQ. Ageratina adenophora. Oval base of the achene. Photo by Julia Scher, USDA-APHIS-PPQ.
Ageratina adenophora
Ageratina adenophora. Oval base of the achene. Photo by Julia Scher, USDA-APHIS-PPQ.

Ageratina riparia.  Linear to lanceolate achenes with long barbed pappus. Ageratina riparia. Linear to lanceolate achenes with long barbed pappus.
Ageratina riparia
Ageratina riparia. Linear to lanceolate achenes with long barbed pappus.
Ageratina riparia . Achenes are black, with strong longitudinal ridges.Photo by Julia Scher, USDA-APHIS-PPQ. Ageratina riparia. Achenes are black, with strong longitudinal ridges.Photo by Julia Scher, USDA-APHIS-PPQ.
Ageratina riparia
Ageratina riparia. Achenes are black, with strong longitudinal ridges.Photo by Julia Scher, USDA-APHIS-PPQ.
Ageratina riparia. Achenes are pubescent with short teeth.Photo by Julia Scher, USDA-APHIS-PPQ. Ageratina riparia. Achenes are pubescent with short teeth.Photo by Julia Scher, USDA-APHIS-PPQ.
Ageratina riparia
Ageratina riparia. Achenes are pubescent with short teeth.Photo by Julia Scher, USDA-APHIS-PPQ.
Ageratum houstonianum.  Conical achenes. Ageratum houstonianum. Conical achenes.
Ageratum houstonianum
Ageratum houstonianum. Conical achenes.

Ageratum houstonianum.  Pappus with five to six scales. Ageratum houstonianum. Pappus with five to six scales.
Ageratum houstonianum
Ageratum houstonianum. Pappus with five to six scales.
Ageratum houstonianum. Opposite sides of the same fruit. Two of the five pappus scales have been removed. Photo courtesy of USDA-APHIS-PPQ. Ageratum houstonianum. Opposite sides of the same fruit. Two of the five pappus scales have been removed. Photo courtesy of USDA-APHIS-PPQ.
Ageratum houstonianum
Ageratum houstonianum. Opposite sides of the same fruit. Two of the five pappus scales have been removed. Photo courtesy of USDA-APHIS-PPQ.
Agrimonia striata. Burr with distal hooked spines. Agrimonia striata. Burr with distal hooked spines.
Agrimonia striata
Agrimonia striata. Burr with distal hooked spines.
From Left to Right: 1 . Agropyron desertorum 2. Agropyron cristatum 3. Agropyron fragile ssp. sibericum . From Left to Right: 1. Agropyron desertorum 2. Agropyron cristatum 3. Agropyron fragile ssp. sibericum.
Agropyron cristatum
From Left to Right: 1. Agropyron desertorum 2. Agropyron cristatum 3. Agropyron fragile ssp. sibericum.

Agropyron cristatum.  Lanceolate florets. Agropyron cristatum. Lanceolate florets.
Agropyron cristatum
Agropyron cristatum. Lanceolate florets.
Agropyron desertorum.  Florets. Agropyron desertorum. Florets.
Agropyron desertorum
Agropyron desertorum. Florets.
From Left to Right: 1. Agropyron desertorum 2. Agropyron cristatum 3. Agropyron fragile ssp. sibericum . From Left to Right: 1. Agropyron desertorum 2. Agropyron cristatum 3. Agropyron fragile ssp. sibericum.
Agropyron desertorum
From Left to Right: 1. Agropyron desertorum 2. Agropyron cristatum 3. Agropyron fragile ssp. sibericum.
Agropyron fragile.  Florets. Agropyron fragile. Florets.
Agropyron fragile
Agropyron fragile. Florets.

From Left to Right: 1. Agropyron desertorum 2. Agropyron cristatum 3. Agropyron fragile ssp. sibericum . From Left to Right: 1. Agropyron desertorum 2. Agropyron cristatum 3. Agropyron fragile ssp. sibericum.
Agropyron fragile
From Left to Right: 1. Agropyron desertorum 2. Agropyron cristatum 3. Agropyron fragile ssp. sibericum.
Agrostemma githago.  Wedge compressed, tuberculate true seeds. Agrostemma githago. Wedge compressed, tuberculate true seeds.
Agrostemma githago
Agrostemma githago. Wedge compressed, tuberculate true seeds.
Agrostemma githago . Multiple views of seed. Photo courtesy of USDA-APHIS-PPQ. Agrostemma githago. Multiple views of seed. Photo courtesy of USDA-APHIS-PPQ.
Agrostemma githago
Agrostemma githago. Multiple views of seed. Photo courtesy of USDA-APHIS-PPQ.
Agrostis canina.  Brown caryopsis, top middle. Yellowish-brown spikelets and florets. Agrostis canina. Brown caryopsis, top middle. Yellowish-brown spikelets and florets.
Agrostis canina
Agrostis canina. Brown caryopsis, top middle. Yellowish-brown spikelets and florets.

Agrostis capillaris.  Caryopsis upper center. Agrostis capillaris. Caryopsis upper center.
Agrostis capillaris
Agrostis capillaris. Caryopsis upper center.
Agrostis capillaris.  Paleas from one-half to slightly exceeding the caryopsis. Agrostis capillaris. Paleas from one-half to slightly exceeding the caryopsis.
Agrostis capillaris
Agrostis capillaris. Paleas from one-half to slightly exceeding the caryopsis.
Agrostis exarata.  Straight awn that is an extension of the midnerve. Agrostis exarata. Straight awn that is an extension of the midnerve.
Agrostis exarata
Agrostis exarata. Straight awn that is an extension of the midnerve.
Agrostis gigantea.  Caryopsis top center. Palea one-half or exceeding the length of the caryopsis. Agrostis gigantea. Caryopsis top center. Palea one-half or exceeding the length of the caryopsis.
Agrostis gigantea
Agrostis gigantea. Caryopsis top center. Palea one-half or exceeding the length of the caryopsis.

Agrostis gigantea. Inflorescence tip. Photo courtesy of USDA-APHIS-PPQ. Agrostis gigantea. Inflorescence tip. Photo courtesy of USDA-APHIS-PPQ.
Agrostis gigantea
Agrostis gigantea. Inflorescence tip. Photo courtesy of USDA-APHIS-PPQ.
Agrostis stolonifera . Lanceolate florets. Agrostis stolonifera. Lanceolate florets.
Agrostis stolonifera
Agrostis stolonifera. Lanceolate florets.
Aira caryophyllea.  Lanceolate florets. Aira caryophyllea. Lanceolate florets.
Aira caryophyllea
Aira caryophyllea. Lanceolate florets.
Alcea rosea.  Discoid mericarp. Alcea rosea. Discoid mericarp.
Alcea rosea
Alcea rosea. Discoid mericarp.

Alcea rosea.  Deep hilum attachment. Alcea rosea. Deep hilum attachment.
Alcea rosea
Alcea rosea. Deep hilum attachment.
Alcea rosea . Three zones: margin with scales, midsection hairy, and base glabrous.  Alcea rosea. Three zones: margin with scales, midsection hairy, and base glabrous. 
Alcea rosea
Alcea rosea. Three zones: margin with scales, midsection hairy, and base glabrous. 
Alcea rosea . Face of the mericarp. Photo courtesy of USDA-APHIS-PPQ. Alcea rosea. Face of the mericarp. Photo courtesy of USDA-APHIS-PPQ.
Alcea rosea
Alcea rosea. Face of the mericarp. Photo courtesy of USDA-APHIS-PPQ.
Alchemilla mollis.  Obovate achenes. Alchemilla mollis. Obovate achenes.
Alchemilla mollis
Alchemilla mollis. Obovate achenes.

Alectra arvensis.  Seeds are visible inside the fruit coat. Photo by Julia Scher, USDA-APHIS-PPQ. Alectra arvensis. Seeds are visible inside the fruit coat. Photo by Julia Scher, USDA-APHIS-PPQ.
Alectra avensis
Alectra arvensis. Seeds are visible inside the fruit coat. Photo by Julia Scher, USDA-APHIS-PPQ.
Alectra arvensis.  Conical achenes. Photo by Julia Scher, USDA-APHIS-PPQ. Alectra arvensis. Conical achenes. Photo by Julia Scher, USDA-APHIS-PPQ.
Alectra avensis
Alectra arvensis. Conical achenes. Photo by Julia Scher, USDA-APHIS-PPQ.
Alectra arvensis.  Transparent fruit coat with brown veins Photo by Julia Scher, USDA-APHIS-PPQ. Alectra arvensis. Transparent fruit coat with brown veins Photo by Julia Scher, USDA-APHIS-PPQ.
Alectra avensis
Alectra arvensis. Transparent fruit coat with brown veins Photo by Julia Scher, USDA-APHIS-PPQ.
Alectra fluminensis.  Conical achenes. Photo by Julia Scher, USDA-APHIS-PPQ. Alectra fluminensis. Conical achenes. Photo by Julia Scher, USDA-APHIS-PPQ.
Alectra fluminensis
Alectra fluminensis. Conical achenes. Photo by Julia Scher, USDA-APHIS-PPQ.