9. Tribe ANTHEMIDEAE

740
ANTHEMIDEAE
26b. Branches from upper stem, 5–8 cm; lower leaves ovate-
oblong or elliptic-ovate, 2–2.5 × 1–1.5 cm; capitula in
somewhat broad and elongated panicles ................... 20. S. heptapotamicum
22b. Stems few or several, not thickly caespitose; branches more than (3–)5
cm; lobes or lobules not deciduous.
27a. Branches ascending from upper part of stem; middle stem leaves
with (3 or)4 or 5 pairs of segments.
28a. Stem, branches, leaves, and phyllaries gray puberulent or
glabrescent; capitula in groups of 3–5 along branches ...................... 15. S. aucheri
28b. Stem, branches, leaves, and phyllaries arachnoid pubescent, later
partly glabrescent; capitula uniformly distributed along branches .... 3. S. nitrosum
27b. Branches ascending or spreading from middle or lower parts of stem;
middle stem leaves with (2 or)3 or 4 pairs of segments.
29a. Lowermost leaves 3–6 × 1.5–4.5 cm; capitula in dense narrow
panicles ................................................................................................. 12. S. cinum
29b. Lowermost leaves 1–3 × 0.5–2(–2.5) mm; capitula in sparse narrow
panicles.
30a. Branches spreading from lower stem; capitula in
somewhat broad or narrow panicles ................................. 11. S. issykkulense
30b. Branches ascending from middle of stem; capitula
in narrow elongated panicles .................................... 10. S. fedtschenkoanum
1. Seriphidium sect. Seriphidium
绢蒿组 juan hao zu
Herbs, perennial, or subshrubs, tomentose or glabrescent. Leaves 1–3(or 4)-pinnatisect, -partite, or entire.
About 85 species: arid regions of C, S, and SW Asia, N Africa, C, E, S, and W Europe; 29 species (five endemic) in China.
1. Seriphidium schrenkianum (Ledebour) Poljakov, Trudy
Bot. Inst. Akad. Nauk Kazakhsk. S.S.R. 11: 172. 1961.
草原绢蒿 cao yuan juan hao
Artemisia schrenkiana Ledebour, Fl. Ross. 2: 575. 1845.
Herbs, perennial, with a strong stock, 30–50(–60) cm tall,
densely gray and arachnoid tomentose. Lowermost leaves: petiole
2–4 cm; leaf blade broadly ovate or ovate-oblong, 3–6 ×
1.5–2.5 cm, arachnoid tomentose, 2- or 3-pinnatisect; segments
4 or 5(or 6) pairs; lobules 2–6 × 1–1.5 mm, obtuse apically.
Middle stem leaves 2-pinnatisect. Uppermost leaves and leaflike
bracts pinnatisect. Synflorescence a broad or somewhat
broad panicle. Involucre oblong or ellipsoid-oblong, 1.5–2(–2.5)
mm in diam.; phyllaries densely gray tomentose. Florets 5 or 6.
Achenes ovoid or obovoid. Fl. and fr. Aug–Oct.
Desert steppes, steppes, meadow steppes, waste areas, riverbanks,
lakeshores, terraces, canyons, saline-alkaline soils, dunes; 100–1000 m.
E Xinjiang [Kazakhstan, Mongolia, Russia].
2. Seriphidium transiliense (Poljakov) Poljakov, Trudy Bot.
Inst. Akad. Nauk Kazakhsk. S.S.R. 11: 174. 1961.
伊犁绢蒿 yi li juan hao
Artemisia transiliensis Poljakov, Bot. Mater. Gerb. Bot.
Inst. Komarova Akad. Nauk S.S.S.R. 16: 417. 1954.
Subshrubs, with a thick rootstock, 40–80 cm tall, densely
gray or greenish arachnoid tomentose, later glabrescent, lower
bark brown, usually peeling off. Lowermost leaves: petiole 2–
3.5 cm; leaf blade oblong, 3.5–6 × 2.5–5 cm, gray arachnoid pubescent,
2(or 3)-pinnatisect; segments 4 or 5(or 6) pairs; lobules
narrowly linear or narrowly linear-lanceolate, 4–8 × 0.5–1 mm,
mucronulate apically. Middle stem leaves 1- or 2-pinnatisect.
Upper leaves pinnatisect; leaflike bracts linear, entire. Synflorescence
a dense, narrow, elongated panicle. Capitula ± sessile.
Involucre oblong-ellipsoid or oblong, 1–2 mm in diam.; phyllaries
strongly convex, densely pubescent. Florets 3–5; corolla
limb red or yellow. Achenes obovoid. Fl. and fr. Aug–Oct.
Slopes, canyons, rocky hills, riverbanks, steppes, roadsides; low to
middle elevations. N Xinjiang [Kazakhstan].
3. Seriphidium nitrosum (Weber ex Stechmann) Poljakov,
Trudy Bot. Inst. Akad. Nauk Kazakhsk. S.S.R. 11: 172. 1961.
西北绢蒿 xi bei juan hao
Herbs, perennial, or subshrubs, arachnoid pubescent or
partly glabrescent; flowering stems 5–50 cm tall; root solitary;
upper parts with spreading branches. Lower leaves 3–7 cm
overall: petiole long; leaf blade ovate-oblong or elliptic-lanceolate,
30–40 × 5–20 mm, (1 or)2-pinnatisect; segments 4 or 5
pairs; lobules narrowly linear, 3–5 × 0.3–0.8 mm. Middle stem
leaves 1- or 2-pinnatisect. Upper leaves pinnatisect; leaflike
bracts linear, entire, rarely pinnatisect. Synflorescence a somewhat
broad to slender, cylindric panicle. Capitula remote or
grouped along branches, sessile. Involucre cylindric or ovoidcylindric,
1.5–2 mm in diam.; phyllaries densely arachnoid
pubescent, later sparsely pubescent or glabrescent. Florets 3–6;
corolla purple-pink or yellow. Achenes obovoid. Fl. and fr.
Aug–Oct.
Desert or semidesert steppes, Gobi Desert, rocky slopes, dry canyons,
dry riverbanks, roadsides, terraces, saline-alkaline soils; low ele-