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4. Erigeron sect. Trimorpha (Cassini) Candolle, Prodr. 5: 290. 1836.
三型花飞蓬组 san xing hua fei peng zu
Trimorpha Cassini, Bull. Sci. Soc. Philom. Paris 1817: 137. 1817.
Herbs, annual, biennial, or perennial, taprooted or fibrous-rooted; caudex simple. Stems usually branched. Leaves basal and cauline, oblanceolate or oblong to lanceolate or linear-lanceolate, base not clasping, margin entire or sparsely serrate. Capitula erect in bud, few or numerous, in corymbiform or broadly racemiform synflorescences. Ray florets 3-5-seriate, in 2 zones, outer 1-3 lamina filiform, white to pink or purplish, erect, not coiling or reflexed, inner 2 elaminate. Achenes 2-2.4 mm, 2-veined. Pappus of 12-35 bristles, accrescent.
About 30 species: Asia, C and N Europe, North America; six species (one endemic) in China.
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| 1 |
Ray floret lamina equaling or slightly longer than disk florets; phyllaries shorter than disk; biennial or perennial herbs. |
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31 E. acris |
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Ray floret lamina longer than disk florets, rarely only slightly so; phyllaries shorter than or almost equaling disk; perennial herbs |
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(2) |
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| 2 (1) |
Ray florets blue. |
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34 E. tianschanicus |
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Ray florets pink or lilac |
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(3) |
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| 3 (2) |
Stems and phyllaries stipitate glandular and hirsute-villous; leaves lanceolate to oblanceolate |
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(4) |
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Stems strigillose or strigose, or glabrate at base, phyllaries villous or strigillose, sometimes sparsely short-stipitate glandular; leaves linear-lanceolate or linear |
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(5) |
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| 4 (3) |
Stems densely stipitate glandular at least below capitula and sparsely hirsute-villous; ray florets pink. |
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32 E. krylovii |
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Stems sparsely stipitate glandular and densely villous, lower part almost entirely densely villous; ray florets pink or lilac. |
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33 E. pseudoseravschanicus |
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| 5 (3) |
Stems reddish; leaf blade linear-lanceolate to linear, margin entire; phyllaries reddish or rarely green, villous, inner shorter than disk florets. |
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35 E. schmalhausenii |
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Stems green; leaf blade linear, margin serrate or subentire; phyllaries green or reddish at apex, strigillose, inner slightly longer than or almost equaling disk florets. |
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36 E. fukuyamae |
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Lower Taxa
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