Artemisia palmeri
Artemisia pontica
Palmer sagewort, San Diego sagewort
armoise de la mer noire, green-ginger, roman wormwood
usually 1–15, erect, brown, simple (wandlike, brittle, bases woody), glabrous.
relatively numerous, erect, brown, mostly simple (brittle, bases woody) canescent or glabrate.
cauline (petiolate), bicolor (gray-green and dark green);
blades broadly lanceolate, 3.5–12(–15) × 0.2–10 cm, relatively deeply and coarsely pinnately lobed (lobes 3–7+), faces canescent (abaxial) or glabrous or sparsely hairy (adaxial).
cauline, grayish green;
sessile (proximalmost short-petiolate);
blades triangular to ovate, 1–5 × 1–3 cm, 2–3-pinnatifid (lobes 0.5–1 mm wide, acute), faces pubescent (abaxial) or hairy to glabrate (adaxial).
globose, 2.5–3.5 × 2–5 mm.
spheric, 1.5–2(–3) mm.
pistillate 0;
bisexual 8–30;
corollas pale yellow, 1.5–2.2 mm, resinous-glandular (style branches exsert, truncate, erose).
pistillate 10–12;
bisexual 40–45;
corollas pale yellow, 0.2–0.3 mm, sometimes gland-dotted (stigma lobes relatively short, not emerging from tubes, short-ciliate).
(pale green to stramineous) broadly ovate, glabrous or sparsely hairy (receptacles paleate).
(subequal) linear, hairy.
(erect or nodding, peduncles relatively slender) in open, paniculiform arrays, 15–40 × 3–10 cm (widely branched).
(nodding) in paniculiform arrays 10–22 × 2–4 cm.
(light brown, shiny) ellipsoid, 1–1.2 mm, (4-angled), glabrous or glandular.
ellipsoid (angled), 0.1–0.2 mm, glabrous.
= 18.
= 18.
Artemisia palmeri
Artemisia pontica
Of conservation concern.
Artemisia palmeri is known only from drainages near the coast, from northeast of San Diego to just south of Ensenada. Most of its habitat has been destroyed by urban development. It is of particular interest because of its paleate receptacles, an anomalous trait that confounds our understanding of its evolutionary relationship to other species of Artemisia.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Artemisia pontica has finely dissected gray foliage and is widely planted as an ornamental. It escapes locally; it has not been reported as problematic. The only species with which it has been confused in North America is A. abrotanum, which has dark green (not gray) foliage.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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