Artemisia subg. Absinthium

(Miller) Lessing

Syn. Gen. Compos., 264. 1832.

Basionym: Undefined subg. Absinthium Miller Gard. Dict. Abr. ed. 4, vol. 1. 1754
Synonyms: Artemisia subsect. Absinthium (Miller) Darijma
Treatment appears in FNA Volume 19. Treatment on page 518. Mentioned on page 504.

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.

Distribution

Temperate regions, North America, South America, Eurasia

Discussion

Species ca. 40 (5 in the flora).

Key

1 Plants 10–40 or 40–60(–100) cm; leaves pinnately lobed (basal 2–3-pinnatifid) or 1–2-ternately lobed > 2
1 Plants 5–50 cm; leaves entire or 1–3-pinnately lobed > 3
2 Leaves pinnately lobed (basal 2–3-pinnatifid, lobes obovate) Artemisia absinthium
2 Leaves 1–2-ternately lobed (lobes filiform, to 0.5 mm wide) Artemisia frigida
3 Involucres 3–5 mm diam Artemisia frigida
3 Involucres 4–8 mm diam > 4
4 Leaves bright green, faces glabrous or sparsely hairy; phyllary margins light green. Artemisia rupestris
4 Leaves gray-green, faces canescent to villous; phyllary margins black to brown > 5
5 Heads borne singly or (2–5) in paniculiform to racemiform arrays; corolla lobes glabrous Artemisia pattersonii
5 Heads (5–22) in spiciform arrays; corolla lobes hairy Artemisia scopulorum
not tailed +  and obtuse +
scarious +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Leila M. Shultz +
(Miller) Lessing +
decurrent +
Undefined subg. Absinthium +
compound +  and simple +
entire;toothed;3-lobed;entire;toothed;3-lobed;lobed;spatulate;flabellate;spatulate;flabellate;cuneate;obovate;oblanceolate;oblong;elliptic;ovate;lanceolate;linear;filiform +
fertile +  and bisexual +
zygomorphic +, actinomorphic +  and (3-)5-merous +
red +  and pale-yellow +
winged +  and monomorphic +
fertile +  and bisexual +
fertile +  and bisexual +
Temperate regions +, North America +, South America +  and Eurasia +
gland-dotted +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
spiciform +  and racemiform +
in subcapitate clusters +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
turbinate;ovoid;turbinate;ovoid;globose;campanulate +
sessile +  and petiolate +
persistent +  and deciduous +
cauline +  and basal +
deltate +
entire +  and dentate +
2-carpellate +
persistent +
2 +  and 20 +
Syn. Gen. Compos., +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
conic;convex;conic;convex;flat +
besser1829a +
2 +  and 5 +
exalbuminous +
hairy +  and glabrous +
1 +  and 10 +
not wand-like +
appendaged +  and truncate +
papillate +
Artemisia subsect. Absinthium +
Artemisia subg. Absinthium +
Artemisia +
subgenus +
funnel +  and subglobose +
cylindric +
shrub +  and subshrub +