| 1 |
Involucre 3-4 mm in diam.; marginal florets 10-15, disk florets 10-30 |
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(2) |
| + |
Involucre 1-2.5(-3.5) mm in diam.; marginal florets 2-9, disk florets 2-15 |
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(5) |
| |
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| 2 (1) |
Lower stem leaf petioles 5-7 cm; blades 10-15 cm; disk florets 25-30. |
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171 A. bargusinensis |
| + |
Lower stem leaf petioles to 3 cm; blades 2-5 cm; disk florets 10-20 |
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(3) |
| |
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| 3 (2) |
Middle stem leaves spatulate or obovate-spatulate. |
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181 A. nanschanica |
| + |
Middle stem leaves ovate, ovate-oblong, or elliptic |
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(4) |
| |
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| 4 (3) |
Leaf blade pinnatisect; lower and middle leaves with petiole 1-3 cm; florets 21-30. |
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170 A. depauperata |
| + |
Leaf blade ternately 3-partite (or -cleft); lower and middle leaves ± sessile; florets 33-40. |
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184 A. tridactyla |
| |
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| 5 (1) |
Lower and middle stem leaf blades widest above middle, spatulate or subspatulate, often with attenuate base, serrate at apex, entire or 3-5-cleft with much broader middle lobe |
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(6) |
| + |
Lower and middle stem leaves widest at or below middle |
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(11) |
| |
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|
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| 6 (5) |
Middle stem leaves 2-6 cm wide |
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(7) |
| + |
Middle stem leaves 0.5-1.2(-2) cm wide |
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(9) |
| |
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| 7 (6) |
Middle stem leaves 5.5-8 × 4-6 cm; involucre 2-3 mm in diam. |
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176 A. littoricola |
| + |
Middle stem leaves 2.5-4 × 2-4 cm; involucre 1.5-2(-3) mm in diam |
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(8) |
| |
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| 8 (7) |
Synflorescence a narrow, ± cylindric panicle. |
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177 A. manshurica |
| + |
Synflorescence a broad, ± conical panicle. |
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174 A. eriopoda |
| |
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| 9 (6) |
Basal leaves entire. |
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178 A. japonica |
| + |
Basal leaves 1- or 2-pinnatipartite or -pinnatisect |
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(10) |
| |
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|
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| 10 (9) |
Middle stem leaves 2-3 cm, lobes 1-2 mm wide. |
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179 A. parviflora |
| + |
Middle stem leaves 1-1.5, lobes 3-4 mm wide. |
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180 A. hancei |
| |
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|
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| 11 (5) |
Middle stem leaves 3-5(-7)-partite |
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(12) |
| + |
Middle stem leaves 1- or 2-pinnatisect or pinnatipartite |
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(14) |
| |
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|
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| 12 (11) |
Branches 15-35 cm or more, usually flexuous and horizontal; middle stem leaves 3-7 cm wide. |
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183 A. dubia |
| + |
Branches 8-14 cm, ascending; middle stem leaves 0.8-1.5 cm wide |
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(13) |
| |
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| 13 (12) |
Middle stem leaves with lobes 10-20 mm; leaflike bracts 3-partite; corolla limb glabrous. |
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185 A. giraldii |
| + |
Middle stem leaves with lobes 5-8(-10) mm; leaflike bracts linear or linear-lanceolate; corolla limb puberulent. |
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186 A. conaensis |
| |
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| 14 (11) |
Rhizomes not shortly terete; middle stem leaves spatulate or attenuate, entire or obliquely 3-5-cleft, -partite, or -sect from apex to base, or leaves heteromorphic, spatulate or attenuate in sterile branches and 1(or 2)-pinnatisect or -partite. |
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175 A. angustissima |
| + |
Rhizomes shortly terete; sterile and middle stem leaves not spatulate or attenuate, middle leaves 1- or 2-pinnatisect |
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(15) |
| |
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| 15 (14) |
Stem, branches, leaves, and phyllaries densely gray and yellowish sericeous- pubescent, later sparsely pubescent; middle stem leaves with 2 or 3 pairs of lobes. |
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173 A. duthreuil-de-rhinsi |
| + |
Stem, branches, and leaves pubescent or glabrescent; middle stem leaves with 2 or 3 pairs of lobes |
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(16) |
| |
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| 16 (15) |
Middle stem leaves shortly petiolate, 1-pinnatipartite, or 2-pinnatipartite and then lobulate from mid-lateral lobes; capitula sparse. |
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172 A. desertorum |
| + |
Middle stem leaves sessile, 1- or 2-pinnatisect, segments 2 or 3 pairs, basal lobes lobulate or not; capitula many, dense. |
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182 A. pengchuoensis |
