9. Tribe ANTHEMIDEAE

ANTHEMIDEAE
20a. Involucre semi-globose or subglobose, 2.5(–3) mm in diam.; disk florets
5–10 ........................................................................................................................ 154. A. nortonii
20b. Involucre ovoid-oblong or ellipsoid, 2–2.5 mm in diam.; disk florets
4–6 ................................................................................................................. 149. A. saposhnikovii
18b. Lowermost and middle stem leaves 2(or 3)-pinnatisect, segments of lowermost
leaves 4 or 5 pairs.
21a. Middle stem leaf segments 3 or 4(or 5) pairs; synflorescence a broad, conical
panicle ................................................................................................................... 148. A. marschalliana
21b. Middle stem leaf segments 2 or 3 pairs; synflorescence a narrow, cylindric
panicle.
22a. Lowermost and middle stem leaves 1.5–2.5 × 1–1.5 cm, lowermost 1- or
2-pinnatisect, segments 2–5 pairs; capitula 1.5–2.5 mm in diam., in
narrow panicles ................................................................................................ 153. A. xigazeensis
22b. Lowermost and middle stem leaves less than 1 × 1 cm, 2-pinnatisect,
segments 2 pairs; capitula 1–1.5 mm in diam., in somewhat broad or
narrow panicles ............................................................................................... 144. A. globosoides
12b. Perennial, annual, or biennial herbs, root solitary, or nearly subshrubs but not caespitose and
lobules of leaves thin and soft, other lobules narrowly linear, filiform, or linear-lanceolate, less
than 1 mm wide; not growing in arid areas.
23a. Annual, biennial, or perennial herbs, root solitary, narrowly fusiform; lobules of middle
stem leaves soft and thin, narrowly linear-filiform or narrowly linear-lanceolate,
0.2–0.5(–1) mm wide.
24a. Segments of middle stem leaves 5–8 pairs; phyllaries gray puberulent ........................ 169. A. blepharolepis
24b. Segments of middle stem leaves (1 or)2–4 pairs; phyllaries often glabrous or glabrescent.
25a. Middle stem leaves 2-pinnatisect, segments (3 or)4 pairs; capitula densely spicate
on branches and in narrow or somewhat broad panicles .................................................. 167. A. stricta
25b. Middle stem leaves 1- or 2-pinnatisect, segments (1 or)2 or 3 pairs; capitula spreading
on branches and in broad paniculate or spicate-panicles.
26a. Plants less than 20 cm tall, branched from base of stem, and usually
procumbent; middle stem leaves pinnatisect; capitula in spicate panicles ........... 160. A. demissa
26b. Plants more than 20 cm tall, branched from middle or basally on stem;
middle stem leaves 2-pinnatisect; capitula in broad panicles.
27a. Middle stem leaves gray or yellowish sericeous-pubescent, later
glabrescent; capitula 1.5–2 mm in diam., sessile or shortly pedunculate,
in broad panicles .......................................................................................... 166. A. scoparia
27b. Middle stem leaves persistent pubescent; capitula 1–1.5 mm in diam.,
shortly pedunculate, in much-branched panicles ....................................... 168. A. pewzowii
23b. Perennial herbs, or nearly subshrubs, roots several, rarely solitary, but not narrowly fusiform;
lobules in middle stem leaves narrowly linear, more than (0.5–)1 mm wide.
28a. Plants less and shorter branched; capitula in narrow panicles .............................................. 161. A. macilenta
28b. Plants more and long branched; capitula in broad or somewhat broad, rarely narrow,
panicles.
29a. Capitula 1–1.5(–2) mm in diam., spreading apically on branches or branchlets and
in broad and elongated panicles.
30a. Basal and lowermost leaves 7–8 × 5–7.5 cm, 2- or 3-pinnatisect or -partite,
lobules 10–20 × 2–4 mm; phyllaries revolute at apex .................................. 162. A. chienshanica
30b. Basal and lowermost leaves 2–4(–5) × 1.5–3.5 cm, 2(or 3)-pinnatisect,
lobules 5–10 × 0.5–1.5(–2) mm; phyllaries erect at apex .................................. 163. A. capillaris
29b. Capitula 1.5–2 mm in diam., spreading on whole branches or branchlets.
31a. Middle stem leaves 1(or 2)-pinnatisect, segments 1 or 2(or 3) pairs, lobules
narrowly linear; capitula several, in narrow or somewhat broad panicles.
32a. Middle stem leaves 3–3.5 × 3–4 cm, lobes (10–)20–30 × 1–2 mm;
capitula in narrow panicles ................................................................. 164. A. morrisonensis
32b. Middle stem leaves 1.5–2.5 × 1.5–2.5 cm, lobes 3–5 × 0.5–1 mm;
capitula in somewhat broad panicles ....................................................... 159. A. gansuensis
31b. Middle stem leaves 1-pinnatisect, or 2-pinnatisect and then lobes or lobules
linear-lanceolate or nearly subulate, segments in middle stem leaves (2 or)3
pairs; capitula in broad or somewhat broad, rarely narrow, panicles.
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