Artemisia campestris subsp. borealis is an arctic and alpine subspecies of plant in the sunflower family, commonly known as northern wormwood, boreal sage, boreal wormwood or boreal sagewort.Natural Resources Canada, Canada's Plant Hardiness Site, Artemisia borealis Pall. It is native to high latitudes and high elevations in Eurasia and North America. In North America, it can be found in Alaska, Greenland, the Canadian Arctic, and the Rockies, Cascades, and Sierra Nevada as far south as Arizona and New Mexico.Biota of North America Program 2014 state-level distribution map In Eurasia, it is widespread across European and Asiatic Russia and also grows in Scandinavia and in the mountains of central Europe (Carpathians, Alps, etc.)Atlas roślin naczyniowych Polski, Atlas of Vascular Plants of Poland in Polish with photosFlore Alpes, Armoise boréale, Artemisia campestris subsp. borealis in French with photosAltervista Flora Italiana, Artemisia campestris subsp. borealis (Pall.) H. M. Hall & Clem.
Description Perennials, (6–)8–20(–40) cm (caespitose), mildly aromatic; taprooted, caudices branched. Stems (1–)2–5, gray-green, tomentose. Leaves persistent, basal rosettes persistent, gray-green to white; blades ovate, 2–4 × 0.5–1 cm, 2–3-pinnately or -ternately lobed, lobes linear to narrowly oblong, apices acute, faces moderately to densely sericeous. Heads (proximal sessile, distal pedunculate) in (leafy) spiciform arrays 4–9(–12) × (0.5–)1–5 cm. Involucres hemispheric, 3–4 × 3.5–4 mm. Phyllaries (obscurely scarious) densely tomentose-villous. Florets: pistillate 8–10; functionally staminate 15–30; corollas (or lobes) yellow-orange or deep red, 2.2–3.5. Cypselae oblong-lanceoloid, somewhat compressed, , faintly nerved, glabrous.Flora of North America Vol. 19, 20 and 21 Page 505 Artemisia borealis Pallas, Reise Russ. Reich. 3: 755. 1776.
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