Difference between revisions of "Artemisia spiciformis"
Bull. Torrey Bot. Club 27: 507. 1900.
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|common_names=Snowfield sagebrush | |common_names=Snowfield sagebrush | ||
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|publication year=1900 | |publication year=1900 | ||
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|tribe=Asteraceae tribe Anthemideae | |tribe=Asteraceae tribe Anthemideae | ||
|genus=Artemisia | |genus=Artemisia | ||
Latest revision as of 19:57, 5 November 2020
Shrubs, 30–80 cm (widely branched, gray-tomentose), aromatic; root-sprouting. Stems relatively numerous, brown or grayish green. Leaves ± deciduous (by late summer, turning yellow); blades lanceolate, oblanceolate, or cuneate, 2.5–5.5 × 0.8–1.2+ cm, entire or irregularly 3–6-lobed (lobes to 1/3 blade lengths, 1.5+ mm wide, rounded or acute; leaves of flowering stems usually smaller, entire), faces ± sericeous or tomentose. Heads (erect) in (leafy) paniculiform arrays 8–15(–25) × 0.5–3(–4) cm. Involucres ovoid or lanceoloid, (2.5–)4–6(–7) mm. Phyllaries lanceolate, sparsely to densely hairy. Florets 8–18(–27); corollas 2.5–3.5, glabrous. Cypselae 1–1.5 mm, glabrous or resinous. 2n = 18, 36, 54, 72.
Phenology: Flowering mid summer–fall.
Habitat: Moist open slopes, rocky meadows, streamsides, woodlands, late-lying snowfields
Elevation: 2100–3700 m
Distribution
Calif., Colo., Idaho, Nev., Oreg., Utah, Wash., Wyo.
Discussion
Often confused with Artemisia rothrockii, A. spiciformis has been recognized only recently as a widespread, high-elevation sagebrush of late-lying snowfields. Molecular analysis has not yet determined the degree to which this species intergrades with A. cana subsp. viscidula and A. tridentata subsp. vaseyana, the presumed parents of this putative hybrid. Because snow-field sagebrush produces fertile seeds and forms a stable community type, it is treated here as a distinct species.
Selected References
None.