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Asteraceae

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Cirsium vulgare (Savi) Ten.

Tad M. Zebryk
Conoclinium coelestinum DC.

Gordon C. Tucker
Conoclinium coelestinum DC.

Gordon C. Tucker
Conoclinium coelestinum DC.

Gordon C. Tucker
Conoclinium coelestinum DC.

Gordon C. Tucker
Conyza canadensis (L.) Cronq.

F.T. McFarland
Conyza canadensis (L.) Cronq.

Hiram F. Thut
Conyza canadensis (L.) Cronq.

Gordon C. Tucker
Conyza canadensis (L.) Cronq.

Gordon C. Tucker
Conyza canadensis (L.) Cronq.

Gordon C. Tucker
Conyza canadensis (L.) Cronq.

Gordon C. Tucker and John E. Ebinger
Conyza canadensis (L.) Cronq.

Gordon C. Tucker and John E. Ebinger
Conyza canadensis var. canadensis Cronquist

Gordon C. Tucker
Conyza canadensis var. pusilla (Nutt.) Cronq.

Gordon C. Tucker
Coreopsis L.

Gordon C. Tucker
Coreopsis L.

Gordon C. Tucker
Coreopsis lanceolata L.

Jason Haas
Coreopsis lanceolata L.

Gordon C. Tucker and Bob Edgin
Coreopsis lanceolata L.

Jennifer Ward
Coreopsis major Walter

Gordon C. Tucker
Coreopsis major Walter

Gordon C. Tucker
Coreopsis palmata Nutt.

N. L. Owens
Coreopsis palmata Nutt.

Gordon C. Tucker
Coreopsis palmata Nutt.

Jennifer Ward
Coreopsis pubescens Elliott in Elliott

Bob Edgin