Ericameria watsonii

(A. Gray) G. L. Nesom

Phytologia 68: 152. 1990.

Common names: Watson’s goldenbush
Basionym: Haplopappus watsonii A. Gray Proc. Amer. Acad. Arts 16: 79. 1881 (as Aplopappus watsoni)
Treatment appears in FNA Volume 20. Treatment on page 77. Mentioned on page 52.

Plants 5–40 cm. Stems erect to spreading (close to the ground), green when young, becoming pale reddish brown, highly branched, coarsely long-stipitate-glandular. Leaves (crowded) ascending; blades elliptic to oblanceolate, 10–25 × 3–8 mm, midnerves evident (1–2 fainter, collateral nerves often present), (margins undulate) apices acute, apiculate, faces long-stipitate-glandular; fascicles usually absent, (sometimes of 1–3 reduced leaves). Heads usually in cymiform arrays. Peduncles 1–12 mm (bracts 3–20, crowded, leafy, grading into phyllaries). Involucres broadly obconic, 6–8 × 4–7 mm. Phyllaries 25–30 in 3–4 series, green to tan, ovate to oblong, 4–8 × 0.7–1.5 mm, unequal, outer herbaceous or with herbaceous appendages, inner mostly chartaceous, midnerves usually evident, (margins entire, outer often herbaceous, inner scarious) apices acute to acuminate or attenuate, abaxial faces mostly stipitate-glandular. Ray florets 4–8; laminae elliptic, 6–9 × 1–2 mm. Disc florets 12–22; corollas 5.5–6.5 mm. Cypselae tan to brown, narrowly turbinate, 3–4.5 mm (usually 5-ribbed), moderately sericeous; pappi tan, 4–5.5 mm. 2n = 18.

Phenology: Flowering late summer–fall.
Habitat: Rock outcrops, desert scrub, pinyon-juniper, ponderosa pine communities
Elevation: 1300–3400 m


Selected References


Lower Taxa

... more about "Ericameria watsonii"
Lowell E. Urbatsch +, Loran C. Anderson +, Roland P. Roberts +  and Kurt M. Neubig +
(A. Gray) G. L. Nesom +
Haplopappus watsonii +
Watson’s goldenbush +
Ariz. +, Nev. +  and Utah. +
1300–3400 m +
Rock outcrops, desert scrub, pinyon-juniper, ponderosa pine communities +
Flowering late summer–fall. +
Haplopappus sect. Asiris +, Haplopappus sect. Ericameria +, Haplopappus sect. Macronema +  and Haplopappus sect. Stenotopsis +
Ericameria watsonii +
Ericameria +
species +