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119c. ARTEMISIA Linnaeus subg. ABSINTHIUM (Miller) Lessing, Syn. Gen. Compos. 264. 1832.
Absinthium Miller, Gard. Dict. Abr. ed. 4, vol. 1. 1754; Artemisia subsect. Absinthium (Miller) Darijma
Perennials; fibrous rooted, caudices woody, rhizomes absent. Stems not wandlike. Leaves deciduous or persistent, basal and/or cauline (petiolate or sessile, not in fascicles). Heads disciform. Receptacles epaleate, villous (hairs relatively long). Florets: peripheral 6–27 pistillate and fertile; central 15–100 bisexual and fertile; corollas (pale yellow) funnelform.
Species ca. 40 (5 in the flora): temperate regions, North America, South America, Eurasia.
SELECTED REFERENCE Besser, W. S. J. G. von. 1829. Lettre [on Artemisia including Absinthium]...au Directeur. Bull. Soc. Imp. Naturalistes Moscou 1: 219–265.
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| 1 |
Plants 10–40 or 40–60(–100) cm; leaves pinnately lobed (basal 2–3-pinnatifid) or 1–2-ternately lobed |
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(2) |
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Plants 5–50 cm; leaves entire or 1–3-pinnately lobed |
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(3) |
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| 2 (1) |
Leaves pinnately lobed (basal 2–3-pinnatifid, lobes obovate) |
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19 Artemisia absinthium |
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Leaves 1–2-ternately lobed (lobes filiform, to 0.5 mm wide) |
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20 Artemisia frigida (in part) |
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| 3 (1) |
Involucres 3–5 mm diam |
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20 Artemisia frigida (in part) |
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Involucres 4–8 mm diam |
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(4) |
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| 4 (3) |
Leaves bright green, faces glabrous or sparsely hairy; phyllary margins light green. |
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22 Artemisia rupestris |
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Leaves gray-green, faces canescent to villous; phyllary margins black to brown |
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(5) |
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| 5 (4) |
Heads borne singly or (2–5) in paniculiform to racemiform arrays; corolla lobes glabrous |
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21 Artemisia pattersonii |
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Heads (5–22) in spiciform arrays; corolla lobes hairy |
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23 Artemisia scopulorum |
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Lower Taxa
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