Bigflower Agoseris, Large-flowered Agoseris, Large-flower Goat-chicory
Synonyms: Agoseris grandiflora var. grandiflora, Agoseris grandiflora var. leptophylla, Agoseris laciniata, Agoseris plebeja, Troximon grandiflorum
The seed head of large-flowered agoseris beginning to open along the Stubblefield Trail, Turnbull National Wildlife Refuge......July 4, 2018.
The photo above shows a close-up view of the
seed head of large-flowered agoseris. Note that the achenes taper gradually
to the long thin beak. Photographed at about 2800' along Road K6000 at the southeastern
corner of Mt. Adams. The seed head is very similar to that produced by
the common dandylion, but much larger!
The photo above shows a close-up view of the achenes of large-flowered
agoseris. Note that the achene tapers gradually to the long thin beak. In other
words, the achene is not squared-off where it meets the beak, which helps separate
this species from spear-leaf agoseris (Agoseris retrorsa). Photographed
at about 2800' along Road K6000 at the southeastern corner of Mt. Adams.
A lobed basal leaf of large-flowered agoseris from the Columbia Hills........July 7, 2006.
Close-ups of the achene, flower head and involucral bracts of large-flowered agoseris as seen along Forest Service Road 16 at Summit Prairie, Malheur National Forest...........August 2, 2011.
Seed head and colorful involucral bracts of large-flowered agoseris as seen along the Umatilla Rim Trail on the northwest shoulder of High Ridge, Umatilla National Forest...........July 24, 2012.