[Shrub-like Members of the Sunflower Family Found East of the Cascade Mts. of Oregon and Washington]

Goldenweeds and Rabbitbrush East of the Cascade Mountains of Oregon and Washington

The Genera Chrysothamnus and Ericameria

Gray and green rabbitbrush as seen between Fort Rock, OR and Silver Lake, OR. Photographed in mid October.

Truckee Green Rabbitbrush, Truckee Rabbitbrush: Chrysothamnus humilis (Synonyms: Chrysothamnus viscidiflorus, Chrysothamnus viscidiflorus ssp. humilis, Chrysothamnus viscidiflorus var. humilis, Ericameria humilis) - Ray flowers absent. Twigs glabrous or with short spreading hairs. Plants generally under 20 cm high.

Green Rabbitbrush, Green Rabbit-brush: Chrysothamnus viscidiflorus (Synonym: Ericameria viscidiflora) - Ray flowers absent. Herbage of stems and leaves glabrous. Freely branched shrubs to 12 dm tall. Leaves are linear to linear-oblong, green, lacking hairs. The yellow flower heads form cymose clusters at the branch tips. The flower heads are discoid and narrow.

Green Rabbitbrush, Lanceleaf Green Rabbitbrush, Yellow Rabbitbrush: subspecies lanceolatus (Synonyms: Chrysothamnus viscidiflorus ssp. elegans, Chrysothamnus viscidiflorus var. elegans, Chrysothamnus viscidiflorus var. lanceolatus, Ericameria viscidiflora ssp. lanceolata) - Stems green and hirtellous to puberulent., often bristly near the inflorescence. Leaves green, generally hirtellous to puberulent below and glabrous above, generally 2-4.5 cm long and greater than 2 mm wide, not twisted or with a single twist. Margins flat to wavy.

Downy Green Rabbitbrush, Yellow Rabbitbrush: subspecies puberulus (Synonyms: Chrysothamnus viscidiflorus var. puberulus, Ericameria viscidiflora ssp. puberula) - Stems grayish green, densely puberulent. Leaves pale grayish green and densely puberulent, generally 1-3 cm long and 1-2 mm wide, often twisted with flat to wavy margins. Blades thread-like to more or less oblanceolate with several veins visible. One vein is generally visible.

Sticky-flowered Rabbitbrush, Yellow Rabbitbrush: subspecies viscidiflorus (Synonyms: Chrysothamnus viscidiflorus ssp. pumilus, Chrysothamnus viscidiflorus ssp. stenophyllus, Chrysothamnus viscidiflorus ssp. typicus, Chrysothamnus viscidiflorus ssp. viscidiflorus var. viscidiflorus, Chrysothamnus viscidiflorus var. pumilus, Chrysothamnus viscidiflorus var. stenophyllus, Chrysothamnus viscidiflorus var. typicus, Chrysothamnus viscidiflorus var. viscidiflorus, Ericameria viscidiflora, Ericameria viscidiflora ssp. viscidiflora, Ericameria viscidiflora var. stenophylla) - Lower stems green, the upper stems glabrous, puberulent, resin-dotted or often resinous. Leaves glabrous to puberulent, often twisted with wavy to ciliate margins, 0.5-7.5 cm long and 1-10 mm wide. One vein is usually visible in the leaf.

Goldenfleece: Ericameria arborescens (Synonyms: Haplopappus arborescens, Linosyris arborescens) -

Heath Goldenrod, Rabbitbrush, Rabbitbrush Goldenweed: Ericameria bloomeri (Synonyms: Haplopappus bloomeri, Haplopappus bloomeri ssp. sonnei, Happlopappus bloomeri var. angustatus, Haplopappus bloomeri var. bloomeri, Haplopappus bloomeri var. sonnei) - Freely branching shrubs to 6 dm tall. Leaves green, hairless, linear to linear-oblanceolate. The yellow flower heads are clustered at the ends of the twigs. 1-7 rays are usually present per head. Plants of low to moderate elevation. 6. Green's Goldenweed Haplopappus greenei: Freely branched shrubs to 60 cm tall. Leaves gren, hairless, more oblanceolate or spatulate than H. bloomeri. The yellow flower heads are clustered at the ends of the twigs. 1-7 rays are usually present per head. Plants of high elevation in mts.

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

Greene's Goldenbush, Greene's Goldenweed, Greene's Heath Goldenrod: Ericameria greenei (Synonyms: Ericameria greenei ssp. mollis, Haplopappus bloomeri, Haplopappus bloomeri var. greenei, Haplopappus greenei, Haplopappus greenei var. greenei, Haplopappus greenei var. mollis, Macronema greenei) - Ray flowers present. Involucres less than 9 mm tall. Foliage generally lacking glandular hairs. Leaf margins not wavy. Flower heads with less than 20 flowers.

Dwarf Goldenbush, Dwarf Heath Goldenrod, Rubber Weed: Ericameria nana (Synonym: Haplopappus nanus) -

Gray Rabbitbrush, Rubber Rabbitbrush: Ericameria nauseosa (Synonym: Chrysothamnus nauseosus) - Ray flowers absent. Low to mostly tall shrubs covered with soft, gray, felt-like and dense hairs. Leaves linear. Yellow flower heads in cymose clusters of about 5 flowers each. Flower heads narrow. Plants to 2 meters tall.

White Rabbitbrush: variety hololeuca (Synonyms: Bigelowia graveolens var. hololeuca, Chrysothamnus nauseosus ssp. hololeucus, Chrsysothamnus nauseosus var. hololeucus) -

Dwarf Rabbitbrush, Little Rabbitbrush: variety nana (Synonyms: Chrysothamnus nauseosus ssp. nanus, Chrysothamnus nauseosus var. nanus) - Plants 10-30 cm. Leaf blades 1-3 mm wide.

Great Basin Rabbitbrush, Mountain Rubber Rabbitbrush: variety oreophila (Synonyms: Chrysothamnus nauseosus ssp. consimilis, Chrysothamnus nauseosus var. artus, Chrysothamnus nauseosus var. consimilis, Chrysothamnus nauseosus var. oreophilus, Chrysothamnus oreophilus, Chrysothamnus oreophilus var. artus, Ericameria nauseosa ssp. consimilis, Ericameria nauseosa var. arta) - Plants 70-250 cm high. Leaf blades 0.8-1 mm wide.

Gray Rabbit-brush, Rubber Rabbitbrush, Showy Rubber Rabbitbrush: variety speciosa (Synonyms: Chrysothamnus nauseosus ssp. albicaulis, Chrysothamnus nauseosus ssp. speciosus, Chrysothamnus nauseosus var. albicaulis, Chrysothamnus nauseosus var. speciosus, Ericameria nauseosa ssp. nauseosa var. speciosa, Chrysothamnus speciosus) -

Columbia Goldenbush, Columbian Goldenbush, Columbia Goldenweed, Columbia Heath Goldenrod: Ericameria resinosa (Synonym: Haplopappus resinosus) - Shrubs to 60 cm in height, often found growing from cracks in basalt cliffs. The stems are brittle and resinous, and the leaves are glabrous and resinous. The flower heads are narrow with 3-7 pale yellow or whitish ray flowers.

Shrubby Goldenweed, Singlehead Goldenbush: Ericameria suffruticosa (Synonyms: Haplopappus suffruticosus, Macronema suffruticosum) - Herbage glandular. Ray flowers present. Flower heads with more than 20 flowers. Involucres at least 9 mm tall.

Paul Slichter E-mail