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Asteraceae: Composite Family (Compositae)

This is the sunflower or daisy family. It is one of the easiest families of flowering plants to identify. Yet, it is a surprise to almost everyone when they find out that the daisy they gave to their lover, is realy not one flower, but possibly a hundred flowers. Most sunflowers, like the Arrowleaf Balsamroot, (as seen in the video to the right), have two different types of flowers: those that make up the outer "petals" (called ray flowers) and those that make up the inner "disc" (called disc flowers).

Systmatics: This group is a very diverse group. Because of this it is divided into several tribes. There are a few uniting features however.

Specimens List
Arrowleaf Balsamroot

white
Arrowleaf Balsamroot:

Native plant in the northwest (Picture only)

Burdock


Burdock - Arctium minus

VIDEO: of the problem plant species in the US presented by Rob Nelson

Blue Lettuce

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Blue Lettuce - Lactuca tatarica:

VIDEO: of the problem plant species in the US

Bull Thistle

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Bull thistle: Cirsium vulgare

VIDEO: of the problem plant in the US

Starthistle

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Barnaby's Thistle - Centaurea solstitialis:

Info: of the problem plant species in the US.

Canada Thistle


Canada Thistle - Cirsium arvense

VIDEO: of the problem plant species in the US found in Yellowstone

Climbing Hempweed

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Climbing Hempweed - Mikania scandens:

INFO: of the problem plant species in the US.

Common Cocklebur

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Common Cocklebur - Xanthium strumarium

VIDEO: of the problem plant in the US found along the Mississippi

Diffuse Knapweed

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Diffuse Knapweed - Centaurea diffusa:

INFO: on this problem plant species in the US

Field Sowthistle

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Field Sowthistle - Sonchus arvensis

VIDEO: of the problem plant in the US

Gallant Soldier

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Gallant Soldier - Galinsoga parviflora:

Info: of the problem plant species in the US.

Musk Thistle

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Musk Thistle - Carduus nutans

VIDEO: of the problem plant in the US

Oxeye Daisy

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Oxeye Daisy - Leucanthemum vulgare:

VIDEO: of the problem plant species in the US.

Plumeless Thistle

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Plumeless Thistle - Carduus acanthoides

INFO: of the problem plant in the US

Purple Starthistle

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Purple Starthistle - Centaurea calcitrapa

INFO: of the problem plant species in the US.

Russian Knapweed

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Russian Knapweed - Acroptilon repens

INFO: of the problem plant in the US

Scotch Thistle

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Scotch Thistle - Onopordum acanthium:

Info: of the problem plant species in the US.

Spotted Knapweed

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Spotted Knapweed - Centaurea biebersteinii

INFO: of the problem plant in the US

Sunflower

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Sunflower - Helianthus annus:

VIDEO: of the problem plant species in the US.

Texas Blueweed

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Texas Blueweed - Helianthus ciliaris

INFO: of the problem plant in the US


 


 

Links to more information:

Videos on the Web

 

 

 

 

 
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