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25. Arctium Linnaeus, Sp. Pl. 2: 816. 1753.
牛蒡属 niu bang shu
Authors: Zhu Shi & Werner Greuter
Bardana Hill; Lappa Scopoli.
Herbs, biennial [or perennial]. Leaves simple, margin sparsely denticulate to subentire. Capitula many, glabrous or cobwebby, forming a corymbose [or racemose] synflorescence. Phyllaries (except sometimes innermost) narrowed into a slender hooked spine. Stamen filaments papillose; anther with subentire to lacerate basal appendages. Style branches linear. Achene obovoid to narrowly ellipsoid, laterally compressed, rugose, striate or ribbed, apex inconspicuously rimmed. Pappus of ca. 3 rows of bristles, outer ones very short.
Eleven species: N Africa, Asia, Europe; two species in China.
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All phyllaries narrowed into a slender hooked spine; involucre minutely glandular pubescent but not cobwebby. |
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1 A. lappa |
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Inner phyllaries apically expanded into a dark purple ± truncate appendage; involucre ± densely cobwebby. |
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2 A. tomentosum |
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Lower Taxa
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