Browse photos by Craig Althen:
Achillea
Adenocaulon
Adenocaulon bicolor – 4 photos
Agoseris
Agoseris aurantiaca – 3 photos
Agoseris glauca – 2 photos
Ambrosia
Anaphalis
Antennaria
Antennaria alpina – 2 photos
Antennaria howellii – 4 photos
Antennaria racemosa – 2 photos
Arctium
Arctium minus – 6 photos
Arnica
Arnica chamissonis – 5 photos
Arnica cordifolia – 3 photos
Arnica latifolia – 8 photos
Arnica mollis – 4 photos
Arnica rydbergii – 3 photos
Arnica sororia – 1 photo
Artemisia
Artemisia frigida – 2 photos
Balsamorhiza
Bidens
Bidens cernua – 2 photos
Brickellia
Canadanthus
Carduus
Carduus acanthoides – 2 photos
Carduus nutans – 4 photos
Centaurea
Centaurea cyanus – 2 photos
Centaurea diffusa – 5 photos
Chondrilla
Chondrilla juncea – 4 photos
Cirsium
Cirsium arvense – 3 photos
Cirsium hookerianum – 2 photos
Cirsium scariosum – 5 photos
Cirsium undulatum – 3 photos
Cirsium vulgare – 6 photos
Conyza
Conyza canadensis – 3 photos
Crepis
Crepis acuminata – 3 photos
Crepis atribarba – 7 photos
Cyclachaena
Ericameria
Ericameria nauseosa – 4 photos
Erigeron
Erigeron compositus – 7 photos
Erigeron divergens – 5 photos
Erigeron glacialis – 3 photos
Erigeron pumilus – 6 photos
Erigeron speciosus – 1 photo
Erigeron strigosus – 4 photos
Eucephalus
Eurybia
Eurybia conspicua – 2 photos
Filago
Filago arvensis – 3 photos
Gaillardia
Gaillardia aristata – 3 photos
Gnaphalium
Gnaphalium palustre – 3 photos
Grindelia
Grindelia squarrosa – 5 photos
Gutierrezia
Helianthella
Helianthus
Helianthus annuus – 1 photo
Heterotheca
Heterotheca villosa – 3 photos
Hieracium
Hieracium scouleri – 5 photos
Hieracium triste – 3 photos
Hypochaeris
Hypochaeris radicata – 11 photos
Ionactis
Ionactis stenomeres – 2 photos
Jacobaea
Jacobaea vulgaris – 5 photos
Lactuca
Lactuca serriola – 8 photos
Lapsana
Lapsana communis – 2 photos
Leucanthemum
Madia
Madia exigua – 2 photos
Madia glomerata – 3 photos
Matricaria
Microseris
Microseris nutans – 2 photos
Mycelis
Mycelis muralis – 8 photos
Packera
Packera cana – 3 photos
Packera indecora – 3 photos
Packera subnuda – 7 photos
Petasites
Petasites japonicus – 2 photos
Pseudognaphalium
Ratibida
Rudbeckia
Rudbeckia hirta – 2 photos
Senecio
Senecio fremontii – 4 photos
Senecio vulgaris – 5 photos
Solidago
Solidago lepida – 2 photos
Solidago simplex – 1 photo
Sonchus
Sonchus asper – 4 photos
Symphyotrichum
Tanacetum
Tanacetum vulgare – 4 photos
Taraxacum
Tragopogon
Tragopogon dubius – 4 photos
Tripleurospermum