[Daisies and Fleabanes: The Genus Erigeron in the Cascade Mountains of Oregon and Washington]

Northern Daisy

Erigeron nivalis

Synonyms: Erigeron acris, Erigeron acris ssp. debilis, Erigeron acris var. debilis, Trimorpha acris var. debilis

Northern Daisy: Erigeron nivalis (Synonyms: Erigeron acris, Erigeron acris ssp. debilis, Erigeron acris var. debilis, Trimorpha acris var. debilis) - Northern Daisy: Erigeron nivalis (Synonyms: Erigeron acris, Erigeron acris ssp. debilis, Erigeron acris var. debilis, Trimorpha acris var. debilis)

Northern Daisy: Erigeron nivalis (Synonyms: Erigeron acris, Erigeron acris ssp. debilis, Erigeron acris var. debilis, Trimorpha acris var. debilis) - Northern Daisy: Erigeron nivalis (Synonyms: Erigeron acris, Erigeron acris ssp. debilis, Erigeron acris var. debilis, Trimorpha acris var. debilis)

Northern daisies blooming along the road at Lone Frank Pass, Okanogan-Wenatchee National Forest.......July 29, 2018.

Northern Daisy: Erigeron nivalis (Synonyms: Erigeron acris, Erigeron acris ssp. debilis, Erigeron acris var. debilis, Trimorpha acris var. debilis)

The photo above shows a close-up of the flower head and upper stem of bitter fleabane. Note the numerous narrow ray flowers which are very short and barely extend past the involucral bracts. Photographed at about 6700' at the base of rocky outcrops atop the steep north-facing slopes of the Ridge of Wonders..........August 12, 2006. This variety typically has one or occasionally several flower heads per stem. This species of fleabane has relatively short ray flowers compared to other showier fleabanes found on Mt. Adams.

Flower head of Northern Daisy: Erigeron nivalis (Synonyms: Erigeron acris, Erigeron acris ssp. debilis, Erigeron acris var. debilis, Trimorpha acris var. debilis)

The photo above shows a close-up of the flower head of bitter fleabane as seen from above. Note the numerous narrow ray flowers as well as the numerous narrow ray flowers surrounding the central disk. Photographed at about 6700' atop the Ridge of Wonders on the eastern slopes of Mt. Adams.........August 12, 2006.

Northern Daisy: Erigeron nivalis (Synonyms: Erigeron acris, Erigeron acris ssp. debilis, Erigeron acris var. debilis, Trimorpha acris var. debilis)

The photo above shows a close-up of part of the inflorescence of bitter fleabane. Ridge of Wonders...........August 12, 2006.

Achene of Northern Daisy: Erigeron nivalis (Synonyms: Erigeron acris, Erigeron acris ssp. debilis, Erigeron acris var. debilis, Trimorpha acris var. debilis)

The photo above shows a close-up of the spreading hairs (both long and short) and the linear achene attached directly to the flaring rays of the pappus of bitter fleabane. Photographed at about 6700' atop the Ridge of Wonders on the eastern slopes of of Mt. Adams.........August 12, 2006.

Seed head of Northern Daisy: Erigeron nivalis (Synonyms: Erigeron acris, Erigeron acris ssp. debilis, Erigeron acris var. debilis, Trimorpha acris var. debilis)

The photo above shows a flower head and developing seed head on the Ridge of Wonders on the eastern slopes of of Mt. Adams.........August 12, 2006.

Basal leaves of Northern Daisy: Erigeron nivalis (Synonyms: Erigeron acris, Erigeron acris ssp. debilis, Erigeron acris var. debilis, Trimorpha acris var. debilis)

The photo above shows the oblanceolate basal leaves of bitter daisy (var. debilis) as seen on the Ridge of Wonders..........August 12, 2006.

Paul Slichter