| 1 |
Annuals; middle phyllaries abaxially cobwebby |
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(2) |
| + |
Perennials; middle phyllaries glabrous or strigose but not abaxially cobwebby |
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(3) |
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| 2 (1) |
Stems and branches yellowish, glabrous or with glandular hairs; leaves green, sparsely cobwebby and glandular hairy. |
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16 E. gmelinii |
| + |
Stems and branches whitish to canescent, densely cobwebby to lanate; leaves grayish white, densely cobwebby to lanate. |
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17 E. nanus |
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| 3 (1) |
Margin of pappus scales not strigose |
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(4) |
| + |
Margin of pappus scales strigose |
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(5) |
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| 4 (3) |
Leaves linear to linear-lanceolate, undivided and with an entire margin, discolorous, abaxially grayish white, adaxially green and glabrous. |
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14 E. integrifolius |
| + |
Leaves elliptic to oblanceolate, margin dentate to bipinnatifid, concolorous, cobwebby to lanate. |
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15 E. humilis |
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| 5 (3) |
Leaves leathery |
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(6) |
| + |
Leaves ± thickly papery |
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(10) |
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| 6 (5) |
Outermost phyllaries 1/3-1/2 as long as involucre |
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(7) |
| + |
Outermost phyllaries 1/5-1/4 as long as involucre |
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(8) |
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| 7 (6) |
Lower leaves lanceolate, undivided but toothed, adaxially glabrous and shiny. |
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1 E. coriophyllus |
| + |
Leaves elliptic, elliptic-lanceolate, or oblanceolate, pinnatipartite to bipinnatipartite, adaxially sparsely cobwebby. |
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2 E. przewalskyi |
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| 8 (6) |
Plants to 1.5 m tall; stems sparsely cobwebby, strigose, and with glandular hairs. |
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4 E. talassicus |
| + |
Plants 0.2-0.6 m tall; stems cobwebby to lanate and strigose but lacking glandular hairs |
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(9) |
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| 9 (8) |
Corolla lobes outside glabrous. |
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3 E. ritro |
| + |
Corolla lobes outside with a few hairs. |
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5 E. tjanschanicus |
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| 10 (5) |
Phyllaries abaxially strigose |
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(11) |
| + |
Phyllaries abaxially glabrous |
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(12) |
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| 11 (10) |
Leaves adaxially glabrous or sparsely cobwebby. |
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12 E. tricholepis |
| + |
Leaves adaxially densely strigose. |
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13 E. sphaerocephalus |
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| 12 (10) |
Stems glabrous to densely cobwebby in lower half but lacking bristles |
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(13) |
| + |
Stems cobwebby and beset with bristles in lower half |
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(14) |
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| 13 (12) |
Lobes of lower and middle cauline leaves densely spinulose ciliate. |
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6 E. grijsii |
| + |
Lobes of lower and middle cauline leaves entire or with irregular spiny teeth. |
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7 E. davuricus |
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| 14 (12) |
Leaves rough, adaxially sparsely strigose. |
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11 E. setifer |
| + |
Leaves smooth, glabrous or adaxially sparsely cobwebby |
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(15) |
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| 15 (14) |
Outermost phyllaries ca. 1/4 as long as involucre; plants 1.5-2 m tall. |
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10 E. sylvicola |
| + |
Outermost phyllaries 1/3-1/2 as long as involucre; plants 0.3-1 m tall |
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(16) |
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| 16 (15) |
Leaves pinnatipartite; phyllaries 18-22. |
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8 E. pseudosetifer |
| + |
Leaves bipinnatisect; phyllaries 16-19. |
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9 E. dissectus |
