| 1 |
Perennial herbs; capitula 1.5-2.5 cm in diam.; phyllaries herbaceous; ray florets white, lamina distinct, 8-13.5 × 1.5-2.5 mm.
(1)
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D. nervosa
|
| 1 + |
Shrubs or perennials; capitula 0.5-1.5(-2) cm in diam.; phyllaries dry membranous; ray florets yellow, lamina usually indistinct or distinct
|
(2)
|
| 2 (1) |
Leaves thin, both surfaces glabrous; capitula 1.5-2 cm in diam., 1-5 axillary in short branches, forming cyme-panicles; ray floret lamina 6-8.5 mm.
(2)
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D. rubricaulis
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| 2 (1) + |
Leaves thick, densely tomentose or lanate; capitula 0.5-1 cm in diam., terminal on stems or branches; ray floret lamina less than 6 mm or ray florets absent
|
(3)
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| 3 (2) |
Leaves decurrent along stems, forming wings; pappus light reddish brown.
(3)
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D. pterocaula
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| 3 (2) + |
Stems wingless; pappus white or grayish white
|
(4)
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| 4 (3) |
Leaves persistently lanate abaxially; ray floret lamina to 1 mm or absent; involucre densely tomentose.
(4)
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D. cappa
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| 4 (3) + |
Leaves pubescent and scabrid abaxially; ray floret lamina at least 3 mm (rarely absent); involucre glandular or pubescent
|
(5)
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| 5 (4) |
Leaves lanceolate or oblanceolate, both surfaces with short glandular hairs, abaxially densely pubescent along veins; capitula few.
(5)
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D. forrestii
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| 5 (4) + |
Leaves oblong, elliptic, or oblong-lanceolate, both surfaces scabrid; capitula numerous
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(6)
|
| 6 (5) |
Leaf blade ca. 10 × 3 cm, apex acute; involucre 7-8 mm, pubescent.
(6)
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D. wissmanniana
|
| 6 (5) + |
Leaf blade 10-18 × 4-6 cm, apex acuminate; involucre 4-5 mm, tomentose.
(7)
|
D. eupatorioides
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