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| 1 |
Middle stem leaves with 2-4 pairs of main segments |
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(2) |
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Middle stem leaves with 4-6 pairs of main segments |
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(10) |
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| 2 (1) |
Capitula 3-4 mm in diam., in groups of 3-6(-8) on branches of large broad panicles. |
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116 A. erlangshanensis |
| + |
Capitula 1.5-3(-4) mm in diam., uniformly distributed along branches in narrow or broad panicles |
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(3) |
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| 3 (2) |
Stem and branches with many sessile blunt multicellular hairs and scattered gland-tipped hairs; middle stem leaves sessile, lobes 3-6(-8) mm wide, revolute, adaxially glandular pubescent and sparsely arachnoid pubescent, abaxial veins with hairs obviously differently colored from those elsewhere. |
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118 A. chingii |
| + |
Stem and branches sparsely pubescent and glandular pubescent or not; middle stem leaves shortly petiolate, lobes (3-)10 mm wide or more, flat, adaxially uniformly glandular pubescent or on veins only or mixed with non-glandular hairs, abaxial veins with hairs same or different colors as those elsewhere |
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(4) |
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| 4 (3) |
Lobes of leaves linear or linear-lanceolate, (1-)1.5-2 × 0.3-1 cm; capitula in broad panicles |
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(5) |
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Lobes of leaves elliptic, oblong, or oblong-ovate, more than 2 × 1 cm; capitula in narrower panicles |
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(6) |
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| 5 (4) |
Lobes of leaves linear, 10-15(-30) × 3-6 mm. |
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119 A. simulans |
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Lobes of leaves linear-lanceolate or elliptic-lanceolate, 15-20 × 5-10 mm. |
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125 A. rosthornii |
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| 6 (4) |
Middle stem leaves 3- or ternately 5-partite, distal and lateral lobes subequal, not caudate, entire or few serrate at margin. |
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126 A. sichuanensis |
| + |
Middle stem leaves 1- or 2-pinnatisect, or -partite, segments 2-4(or 5) pairs, distal ones longer, or not and then with broadly winged rachis, usually serrate |
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(7) |
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| 7 (6) |
Distal lobes not caudate, 2- or 3-cleft, rachis broadly winged |
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(8) |
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Distal lobes caudate, longer than other lobes, serrate, rachis not winged |
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(9) |
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| 8 (7) |
Leaves papery; capitula oblong or oblong-ovoid, 2.5-3(-4) mm in diam. |
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124 A. thellungiana |
| + |
Leaves thickly papery; capitula ovoid, 1.5-2 mm in diam. |
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122 A. orientaliyunnanensis |
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| 9 (7) |
Leaves gland-dotted, segments 2 or 3 pairs, 1- or 2-cleft; capitula oblong or ovoid, 1.5-2(-2.5) mm in diam. |
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117 A. atrovirens |
| + |
Leaves not gland-dotted, segments 3(or 4) pairs, 2- or 3-lobuled or serrate; capitula hemispheric or broadly ovoid, 2.5-3 mm in diam. |
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127 A. zayuensis |
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| 10 (1) |
Capitula (3-)4-5 mm in diam., disk florets 30-40(-50); phyllaries tomentose |
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(11) |
| + |
Capitula 1.5-3(-4) mm in diam., disk florets 2-20(-25), if capitula 3-4 mm in diam. then phyllaries glabrous or sparsely puberulent |
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(12) |
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| 11 (10) |
Phyllary margins not barbate; perennial herbs, 40-120 cm tall; stems glandular pubescent. |
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110 A. viscida |
| + |
Phyllary margins barbate; subshrubs, 25-50 cm tall; stems densely yellowish viscid tomentose. |
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111 A. vexans |
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| 12 (10) |
Middle stem leaves (2 or)3-pinnatisect or -partite, deeply serrate |
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(13) |
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Middle stem leaves 1- or 2-pinnatisect or -partite |
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(15) |
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| 13 (12) |
Uppermost flowering branches short, forming narrow panicle; phyllaries barbate at apex; capitula 3-4 mm in diam. |
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113 A. mattfeldii |
| + |
Flowering branches long, forming broad, much-branched panicles; phyllaries not barbate; capitula 1-2.5 mm in diam |
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(14) |
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| 14 (13) |
Stem, branches, leaves, and phyllaries with prominently gland-tipped hairs; capitula ellipsoid or oblong, 2-2.5 mm in diam. |
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120 A. gyitangensis |
| + |
Stem, branches, and leaves viscid pubescent, phyllaries glandular pubescent and eglandular pubescent or not; capitula ovoid, 1-1.5 mm in diam. |
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128 A. gongshanensis |
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| 15 (12) |
Capitula 3-4 mm in diam |
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(16) |
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Capitula 1.5-2.5(-3) mm in diam |
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(17) |
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| 16 (15) |
Stem and branches sparsely glandular pubescent and densely tomentose, sparsely so later; capitula in narrow panicles. |
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112 A. tangutica |
| + |
Stem and branches densely glandular pubescent, not tomentose; capitula in somewhat broad panicles. |
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115 A. viscidissima |
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| 17 (15) |
Stem and branches densely viscid pubescent; leaves sparsely pubescent adaxially and densely arachnoid tomentose and white gland-dotted abaxially and sparsely glandular pubescent on abaxial veins; capitula in somewhat broad panicles; phyllaries densely tomentose and sparsely glandular pubescent. |
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129 A. yadongensis |
| + |
Stem and branches densely glandular pubescent and sparsely eglandular puberulent, adaxial surface of leaves and abaxial veins glandular pubescent or also tomentose adaxially; capitula in broad panicles; phyllaries arachnoid tomentose or glabrescent |
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(18) |
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| 18 (17) |
Middle stem leaves 1-pinnatisect. |
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123 A. shennongjiaensis |
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Middle stem leaves 2-pinnatipartite or -pinnatisect |
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(19) |
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| 19 (18) |
Middle stem leaves 2-pinnatisect, distances between segments long, distal lobule longer than laterals, linear or linear-lanceolate, 15-25 × 1.5-2.5 mm. |
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114 A. occidentalisichuanensis |
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Middle stem leaves 2-pinnatipartite or nearly -sect, distances between segments shorter, distal lobule subequal to laterals, elliptic-lanceolate or ovate-elliptic, 10-15 × 3-5 mm. |
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121 A. myriantha |
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