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Morphology

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Description

Shrubs, 40–200(–300) cm (herbage gray-haired), aromatic; not root-sprouting (trunks relatively thick). Stems gray-brown, glabrate (bark gray, exfoliating in strips). Leaves persistent, gray-green; blades usually cuneate, (0.4–)0. 5–3.5 × 0.1–0.7 cm, 3-lobed (lobes to 1/3 blade lengths, 1.5+ mm wide, rounded), faces densely hairy. Heads (usually erect, on slender peduncles) in paniculiform arrays 5–30 × 1–6 cm. Involucres lanceolate, (1–)1.5–4 × 1–3 mm. Phyllaries oblanceolate to widely obovate, densely tomentose. Florets 3–8; corollas 1.5–2.5 mm, glabrous. Cypselae 1–2 mm, hairy or glabrous, glandular.

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© Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA

Source: Missouri Botanical Garden

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