Artemisia subg. Absinthium
absinth wormwood, absinthe, absinthe wormwood, absinthium, armoise absinthe, common wormwood, green ginger, oldman, oldman wormwood, wormwood
not wandlike.
deciduous or persistent, basal and/or cauline (petiolate or sessile, not in fascicles).
epaleate, villous (hairs relatively long).
peripheral 6–27 pistillate and fertile;
central 15–100 bisexual and fertile;
corollas (pale yellow) funnelform.
disciform.
Artemisia subg. Absinthium
North America; South America; Temperate regions; Eurasia
Species ca. 40 (5 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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) | A. absinthium |
2. Leaves 1–2-ternately lobed (lobes filiform, to 0.5 mm wide) | A. frigida |
3. Involucres 3–5 mm diam | A. frigida |
3. Involucres 4–8 mm diam | → 4 |
4. Leaves bright green, faces glabrous or sparsely hairy; phyllary margins light green. | A. 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 | A. pattersonii |
5. Heads (5–22) in spiciform arrays; corolla lobes hairy | A. scopulorum |
