Tetradymia canescens
© 2006 Josh
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Grindelia stricta
© 2006 Josh
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Mutisia sp.
© 2004 Josh
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Achillea millefolium
© 2006 Josh
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Lindheimera texana
© 2007 Josh
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Verbesina virginica
© 2007 Josh
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Palafoxia callosa
© 2007 Josh
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Liatris mucronata
© 2007 Josh
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Helenium amarum
© 2007 Josh
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Conoclinium coelestinum
© 2007 Josh
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Symphyotrichum drummondii
© 2007 Josh
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Tagetes lucida
© 2007 Josh
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Conoclinium greggii
© 2007 Josh
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Bidens laevis
© 2007 Josh
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Berlandiera lyrata
© 2007 Josh
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Heterotheca stenophylla
© 2007 Josh
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Berlandiera betonicifolia
© 2008 Josh
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Calyptocarpus vialis
© 2008 Josh
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Rojasianthe superba
© 2006 Eric in SF
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Rojasianthe superba
© 2006 Eric in SF
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Rojasianthe superba
© 2006 Eric in SF
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Geraea canescens and Phacelia calthifolia
© 2005 Dawn Endico
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Montanoa grandiflora
© 2005 Eric in SF
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Rudbeckia nitida
© 2005 Gertrud K.
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Liatris spicata
© 2006 Gertrud K.
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Symphyotrichum ericoides
© 2005 Gertrud K.
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Achillea millefolium
© 2005 Gertrud K.
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Psathyrotes ramosissima
© 2005 Dawn Endico
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Dahlia imperialis
© 2005 Eric in SF
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Felicia amelloides
© 2006 Gertrud K.
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Malacothrix glabrata
© 2005 Dawn Endico
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Helianthus annuus
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Urmenetea atacamensis
© 2008 Jose L. Panero
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Mutisia subulata
© 2008 Jose L. Panero
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Phylidonyris novaehollandiae and Banksia serrata
© 2007 Julian Robinson
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Fouquieria (Idria) columnaris
© 2007 Tomas Castelazo
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Capitulum cross section diagram
© Jose L. Panero
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Sarcobatus vermiculatus
© Steve Dewey, Utah State University, United States
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Sarcobatus vermiculatus
© Richard Old, XID Services, Inc., United States
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Angiosperms
© 2008 Robin Cochran-Dirksen
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