[Goldenweeds and Rabbitbrush: The Genus Ericameria Found East of the Cascade Mts. of Oregon and Washington]

Discoid Goldenweed, Whitestem Goldenbush

Ericameria discoidea

Synonyms: Haplopappus discoidea var. discoidea, Haplopappus macronema, Haplopappus macronema var. macronema, Haplopappus macronema var. typicus, Macronema discoidea

Flower head of Synonyms: Haplopappus discoidea var. discoidea, Haplopappus macronema, Haplopappus macronema var. macronema, Haplopappus macronema var. typicus, Macronema discoidea

The photo above shows a close-up side view of the flower head, involucral bracts and upper stem leaves of discoid goldenweed, photographed at the head of Little Blitzen Canyon, Steens Mountain............September 1, 2011. Note the numerous gland-tipped hairs on the involucral bracts and ventral surface of the leaf blade.

Seed head of Discoid Goldenweed, Whitestem Goldenbush: Ericameria discoidea (Synonyms: Haplopappus discoidea var. discoidea, Haplopappus macronema, Haplopappus macronema var. macronema, Haplopappus macronema var. typicus, Macronema discoidea)The photo at right shows the seed head of discoid goldenweed, photographed atop Mosquito Creek Cirque, Steens Mt..............September 9, 2000.
Characteristics:

Also known as sharp-scaled haplopappus, discoid goldenweed is a low, rounded, , many-branched shrub from 15-40 cm high. The leafy twigs are densely white-tomentose (See photos.), becoming glandular-haired below the flower heads. The leaves are oblong or oblanceolate in shape, very glandular, and from 1-3 cm long and 3-6 mm wide. The leaf margins are noticeably wavy.

The flower heads are usually solitary (occasionally several in close cluster) at the ends of the branches. The glandular-haired involucre is 8-15 mm high with the outer bracts large and somewhat leaf-like. Individual bracts are linear-oblong in shape with thin, membranous margins. The bracts are not shingled. The flowers are all discoid. The 10-25 disk corollas are 8-11 mm high.


Habitat:

Discoid goldenweed is found on open, rocky slopes, often in talus at high elevations in the mountains. It is often found between the elevations of 2500-3750 meters.


Range:

Discoid goldenweed is found from southeastern Oregon south to California and east through central Idaho to western Wyoming, Colorado and Utah.

 

 


Synonyms: Haplopappus discoidea var. discoidea, Haplopappus macronema, Haplopappus macronema var. macronema, Haplopappus macronema var. typicus, Macronema discoidea - Flower head and upper stem leaf of Synonyms: Haplopappus discoidea var. discoidea, Haplopappus macronema, Haplopappus macronema var. macronema, Haplopappus macronema var. typicus, Macronema discoidea

Synonyms: Haplopappus discoidea var. discoidea, Haplopappus macronema, Haplopappus macronema var. macronema, Haplopappus macronema var. typicus, Macronema discoidea

Discoid goldenweed, photographed at the head of Little Blitzen Canyon, Steens Mountain............September 1, 2011.

Close-up of the inflorescence of Discoid Goldenweed, Whitestem Goldenbush: Ericameria discoidea (Synonyms: Haplopappus discoidea var. discoidea, Haplopappus macronema, Haplopappus macronema var. macronema, Haplopappus macronema var. typicus, Macronema discoidea) - Discoid Goldenweed, Whitestem Goldenbush: Ericameria discoidea (Synonyms: Haplopappus discoidea var. discoidea, Haplopappus macronema, Haplopappus macronema var. macronema, Haplopappus macronema var. typicus, Macronema discoidea)

Discoid Goldenweed, Whitestem Goldenbush: Ericameria discoidea (Synonyms: Haplopappus discoidea var. discoidea, Haplopappus macronema, Haplopappus macronema var. macronema, Haplopappus macronema var. typicus, Macronema discoidea) - Close-up of the upper stem leaves and flower head of Discoid Goldenweed, Whitestem Goldenbush: Ericameria discoidea (Synonyms: Haplopappus discoidea var. discoidea, Haplopappus macronema, Haplopappus macronema var. macronema, Haplopappus macronema var. typicus, Macronema discoidea)

Additional close-up photos of discoid goldenweed as seen at the head of Kiger Gorge, Steens Mountain, Harney County, Oregon................August 31, 2011.

Discoid Goldenweed, Whitestem Goldenbush: Ericameria discoidea (Synonyms: Haplopappus discoidea var. discoidea, Haplopappus macronema, Haplopappus macronema var. macronema, Haplopappus macronema var. typicus, Macronema discoidea)

Discoid goldenweed as seen with bottlebrush squirreltail (Elymus elymoides), oval-leaf buckwheat (Eriogonum ovalifolium) and cutleaf daisy (Erigeron compositus) as seen on the summit of the Steens Mountain, Harney County, Oregon..............September 1, 2011.

Discoid Goldenweed, Whitestem Goldenbush: Ericameria discoidea (Synonyms: Haplopappus discoidea var. discoidea, Haplopappus macronema, Haplopappus macronema var. macronema, Haplopappus macronema var. typicus, Macronema discoidea) - Flower head of Discoid Goldenweed, Whitestem Goldenbush: Ericameria discoidea (Synonyms: Haplopappus discoidea var. discoidea, Haplopappus macronema, Haplopappus macronema var. macronema, Haplopappus macronema var. typicus, Macronema discoidea) - Stem leaves of Discoid Goldenweed, Whitestem Goldenbush: Ericameria discoidea (Synonyms: Haplopappus discoidea var. discoidea, Haplopappus macronema, Haplopappus macronema var. macronema, Haplopappus macronema var. typicus, Macronema discoidea)

The photo above shows discoid goldenweed as photographed along the Wildhorse Lake trail, Steens Mt............July 28, 2004. Note the wavy leaf margins and numerous gland-tipped hairs on the leaves and involucral bracts.

Paul Slichter