[Members of the Sunflower Family Having Daisy-like Flower Heads Found West of the Cascade Mountains]

Tackweeds West of the Cascade Mountains of Oregon and Washington

The Genus Calycadenia

Smooth Tackweed, Rosin Weed: Calycadenia truncata (Synonyms: Calycadenia truncata var. scabrella, Calycadenia truncata ssp. scabrella, Calycadenia truncata ssp. truncata)

Smooth Tackweed: Calycadenia truncata

Tufted Tackweed, Fremont's Calycadenia: Calycadenia fremontii (Synonym: Calycadenia ciliosa) -

Smooth Tackweed, Rosin Weed: Calycadenia truncata (Synonyms: Calycadenia truncata var. scabrella, Calycadenia truncata ssp. scabrella, Calycadenia truncata ssp. truncata) -

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