Difference between revisions of "Artemisia papposa"

Revision as of 18:39, 24 September 2019

Shrubs, 5–15(–20) cm (not cespitose), aromatic. Stems relatively numerous, erect, gray, simple (annual flowering branches leafy), loosely sericeous. Leaves (semideciduous) cauline (sessile), gray-green; blades oblanceolate, 0.5–3 × 0.2–1.5 cm (bases attenuate), 3-lobed or irregularly palmatifid (lobes narrow, apices acute), sparsely sericeous-lanate. Heads (mostly erect, peduncles 0 or to 25 mm) in racemiform arrays (4–)8–12(–14) × (0.5–)1–2(–4) cm. Involucres globose, 3.5–5 × 4–5 mm. Phyllaries ovate, sparsely sericeous. Florets: pistillate 8; bisexual 20–35; corollas yellow (tubular with broad throats), ca. 2 mm, glandular. Cypselae (light brown) oblanceoloid (4–5-angled, broadest at truncate apices), 0.3–0.5 mm, glandular-pubescent (pappi coroniform, 0.3–0.6 mm, irregularly lacerate).

Phenology: Flowering early spring–mid summer.
Habitat: Rocky swales, dry meadows, alkaline mud flats
Elevation: 1400–2100 m

Idaho, Nev., Oreg.

Discussion

The pappose cypselae make Artemisia papposa anomalous within Artemisia. Artemisia papposa has capitulescence characteristics that suggest a relationship to Sphaeromeria.

Selected References

None.

Lower Taxa