[The Genus Agoseris East of the Cascade Mts. of Oregon and Washington]

Orange Agoseris

Agoseris aurantiaca

Synonyms: Agoseris aurantiaca ssp. aurantiaca, Agoseris graminifolia, Agoseris rostrata, Troximon aurantiacum

Flower head of Orange Agoseris, Slender Agoseris: Agoseris aurantiaca var. aurantiaca (Synonyms: Agoseris aurantiaca ssp. aurantiaca, Agoseris graminifolia, Agoseris rostrata, Troximon aurantiacum) - Orange Agoseris, Slender Agoseris: Agoseris aurantiaca var. aurantiaca (Synonyms: Agoseris aurantiaca ssp. aurantiaca, Agoseris graminifolia, Agoseris rostrata, Troximon aurantiacum)

The photo above shows a close-up of the flower head of orange agoseris as seen along forest road #3521 in the Wenatchee N.F.........August 13, 2009. The flower heads at this location ranged from orange to mostly yellow to dark pink. The photo at right shows the flower head of orange agoseris as seen along a small creek along the South Loop Road about one mile downhill to the west from the East Rim Viewpoint, Steens Mountain..........September 20, 2015.

Involucral bracts of Orange Agoseris, Slender Agoseris: Agoseris aurantiaca var. aurantiaca (Synonyms: Agoseris aurantiaca ssp. aurantiaca, Agoseris graminifolia, Agoseris rostrata, Troximon aurantiacum) - Involucral bracts of Orange Agoseris, Slender Agoseris: Agoseris aurantiaca var. aurantiaca (Synonyms: Agoseris aurantiaca ssp. aurantiaca, Agoseris graminifolia, Agoseris rostrata, Troximon aurantiacum) - Involucral bracts of Orange Agoseris, Slender Agoseris: Agoseris aurantiaca var. aurantiaca (Synonyms: Agoseris aurantiaca ssp. aurantiaca, Agoseris graminifolia, Agoseris rostrata, Troximon aurantiacum)

These 3 photos show a close-up sideview of the flower head of orange agoseris as seen along forest road #3521 in the Wenatchee N.F........August 13, 2009. Note that the involucral bracts are covered with long, soft, spreading hairs and they become more imbricate as the flower head ages.

Basal leaf of Orange Agoseris, Slender Agoseris: Agoseris aurantiaca var. aurantiaca (Synonyms: Agoseris aurantiaca ssp. aurantiaca, Agoseris graminifolia, Agoseris rostrata, Troximon aurantiacum)

The photo above shows a basal leaf of orange agoseris as seen in meadows on the north side of Hellroaring Creek adjacent to the Island Springs Trail near Bench Lake on the southeastern side of Mt. Adams................July 1, 2005.

A pink-flowered form of Orange Agoseris, Slender Agoseris: Agoseris aurantiaca var. aurantiaca (Synonyms: Agoseris aurantiaca ssp. aurantiaca, Agoseris graminifolia, Agoseris rostrata, Troximon aurantiacum)

The photo above shows a pink-flowered form of orange agoseris as seen in meadows on the north side of Hellroaring Creek adjacent to the Island Springs Trail near Bench Lake on the southeastern side of Mt. Adams.

Close-up of the achene and beak of Orange Agoseris, Slender Agoseris: Agoseris aurantiaca var. aurantiaca (Synonyms: Agoseris aurantiaca ssp. aurantiaca, Agoseris graminifolia, Agoseris rostrata, Troximon aurantiacum)

The photo above shows the achene of orange agoseris. The achene or seed is narrowly elliptical in shape, tapering at both ends. The achene tapers to a narrow, long beak which in turn joins with the parachute-like pappus. Photographed near the trailhead for the Willard Springs Trail at the Conboy Lake NWR headquarters.........July 28, 2006.

Orange Agoseris, Slender Agoseris: Agoseris aurantiaca var. aurantiaca (Synonyms: Agoseris aurantiaca ssp. aurantiaca, Agoseris graminifolia, Agoseris rostrata, Troximon aurantiacum) - Flower head of Orange Agoseris, Slender Agoseris: Agoseris aurantiaca var. aurantiaca (Synonyms: Agoseris aurantiaca ssp. aurantiaca, Agoseris graminifolia, Agoseris rostrata, Troximon aurantiacum)

Orange agoseris as seen (left) along the Roads End Trail #201A, Strawberry Mountain Wilderness........August 18, 2011. The photo at right shows a flower head of orange agoseris as seen along the East Fork Lostine River Trail #1662, Eagle Cap Wilderness.........August 4, 2016.


Flower head of Orange Agoseris, Slender Agoseris: Agoseris aurantiaca var. aurantiaca (Synonyms: Agoseris aurantiaca ssp. aurantiaca, Agoseris graminifolia, Agoseris rostrata, Troximon aurantiacum) - Flower head of Orange Agoseris: Agoseris aurantiaca var. aurantiaca (Synonyms: Agoseris graminifolia, Agoseris rostrata, Troximon aurantiacum)

Two close-up views of the flower heads of nearly yellow-flowered forms of orange agoseris as seen along forest road #3521 in the Wenatchee N.F........August 13, 2009.

Achene and beak of Orange Agoseris, Slender Agoseris: Agoseris aurantiaca var. aurantiaca (Synonyms: Agoseris aurantiaca ssp. aurantiaca, Agoseris graminifolia, Agoseris rostrata, Troximon aurantiacum)

A close-up view of the achene and beak of orange agoseris as seen along forest road #3521 in the Wenatchee N.F........August 13, 2009. Note that the beak is nearly as long as the striated achene.

Involucral bracts of Orange Agoseris, Slender Agoseris: Agoseris aurantiaca var. aurantiaca (Synonyms: Agoseris aurantiaca ssp. aurantiaca, Agoseris graminifolia, Agoseris rostrata, Troximon aurantiacum) - Flower head of Orange Agoseris, Slender Agoseris: Agoseris aurantiaca var. aurantiaca (Synonyms: Agoseris aurantiaca ssp. aurantiaca, Agoseris graminifolia, Agoseris rostrata, Troximon aurantiacum)

Orange agoseris blooming along the Ochoco Mountain Trail #823 along upper Rock Creek, Ochoco National Forest.........July 12, 2017.

Paul Slichter