| 学名(拉丁名) | Artemisia wudanica |
| 中文名 | 乌丹蒿 |
| 命名人 | Liou et W. Wang |
| 中文科名 | 菊科 |
| 拉丁属名 | Artemisia |
| 类型 | species |
| 拉丁科名 | Compositae |
| 中文属名 | 蒿属 |
| 学名(拉丁名) | Artemisia wudanica |
| 命名人 | Liou & Wang-Wei (accepted name) |
| 拉丁属名 | Artemisia |
| 类型 | species |
| 拉丁科名 | Asteraceae |
| 学名(拉丁名) | Artemisia wudanica |
| 中文名 | 乌丹蒿 |
| 拉丁属名 | Artemisia |
| 类型 | species |
| 拉丁科名 | Asteraceae |
| 学名(拉丁名) | Artemisia wudanica |
| 中文名 | 乌丹蒿 |
| 中文科名 | 菊科 |
| 拉丁属名 | Artemisia |
| 类型 | species |
| 拉丁科名 | Asteraceae |
| 中文属名 | 蒿属 |
Herbs perennial, 36-100 cm tall; rhizomes long, slender, stoloniferous. Stems erect, simple, sometimes distally branched, ± flexuous, ± striate, hispid-villous, minutely stipitate glandular. Leaves cauline, slightly reduced upward, abaxially pale green, adaxially green, abaxially hispid-strigose, densely so on veins, adaxially hispid-strigose, both surfaces sparsely minutely stipitate glandular in pits, margin coarsely serrate to serrate, hispid, strigose, or villous-ciliate, midvein prominent abaxially, apex acuminate, mucronate; lowest leaves withered by anthesis (not seen); lower to upper leaves broadly winged petiolate; blade ovate to lanceolate, 3.5-5.5(-10) × 1.5-2.5(-4) cm, base cuneate-rounded to rounded; synflorescence leaves broadly winged shortly petiolate, lanceolate, 1.3-2 × 0.6-0.9 cm, base cuneate, margin 3-6-serrate, slightly resinous. Capitula 16 or more in terminal corymbiform synflorescences, ca. 1.5 cm in diam.; peduncles 7-15 mm or longer, densely hispid-strigose, minutely stipitate glandular, resinous; bracts lanceolate, entire. Involucres campanulate, (4-)5-5.2 × ca. 5 mm; phyllaries 4-seriate, unequal, green apically, abaxially distally villosulous and minutely stipitate glandular, margin scarious, erose, moderately to densely villous-ciliate, midvein more pronounced distally, ± translucent, apex acute to rounded, villous-ciliate; outer phyllaries narrowly ovate, 1.5-2 × ca. 0.8 mm; inner phyllaries oblong, 3-6 × 1.8-1.2 mm, base hardened. Ray florets 10-14 or more, purple, tube apex and lamina base strigose, lamina 6-7(-9) × 1-1.5 mm, eglandular; disk florets yellow, (4-)5 mm, tube base flared, tube apex and proximal limb hairy, minutely stipitate glandular, limb campanulate, ca. 3.2 mm, lobes spreading, narrowly triangular, curved, ca. 1.5 mm, apically sparsely hairy, moderately to densely minutely stipitate glandular. Achenes (immature) oblong, slightly compressed, 2-3 mm, sparsely strigillose, sparsely minutely stipitate glandular, 2-ribbed (± translucent). Pappus 4-seriate, ± reddish; outermost bristles few, slender, 0.5-0.6 mm; outer bristles slender, 2-2.3 mm; inner bristles few, ca. 3 mm, acute; innermost bristles ca. 4 mm, weakly clavate. Fl. and fr. Jul-Oct.
Shaded places in valleys of low mountains or canal banks; 800-1600 m. Anhui, Henan, NW Hubei, S Shaanxi, Sichuan.
137.乌丹蒿（植物分类学报）大头蒿、圆头蒿（内蒙古），“希日一沙巴嘎”（蒙语名）
Artemisia wudanica Liou et W. Wang in Act. Phytotax. Sin. 17(4): 88, fig. 1. 1979.
小灌木。主根粗壮，深长，垂直，灰黑色；根状茎粗大，木质，直径达2厘米，具多数营养枝，常再分枝或具短枝。营养枝与茎、枝共形成密丛。茎多数，木质，粗壮，高可达2米以上，基部直径1.5-1.8厘米，茎皮灰白色，光滑无毛，有明显纵纹，有时成薄片状剥落，分枝多，长10-20厘米或更长，常有短枝。叶质厚，营养枝叶与茎下部及中部叶宽卵形，长（5-）6-8厘米，宽3-4厘米，二回羽状全裂，每侧裂片2-3（-4）枚，长2-5厘米，每裂片再2-3全裂，小裂片狭线形，长2-4厘米，宽1.5-2.5毫米，先端具硬尖头，叶柄长5-6厘米，下部与中部叶的叶柄基部两侧有2-3枚线形、半抱茎的假托叶；上部叶与苞片叶羽状全裂或3全裂，裂片狭线形。头状花序大，球形或近球形，直径4-5毫米，具短梗及线形的小苞叶，下垂，在分枝或分枝的小枝上排成狭长的总状花序，并在茎上组成狭窄、伸长或略开展的圆锥花序；总苞片3层，外、中层总苞片长卵形或宽卵形，先端钝圆，近革质，绿褐色，无毛，边缘狭膜质，内层总苞片长卵形或倒卵形，边缘宽膜质，花序托圆锥形，凸起；雌花7-9朵，花冠狭圆锥形，檐部具2裂齿，花柱伸出花冠外，先端2叉，叉端尖；两性花14-22朵，不孕育，花冠管状。花药线形，先端附属物尖，长三角形，基部圆钝，花柱短，先端膨大，2裂，不叉开，退化子房不明显。瘦果长圆状倒卵形，果壁有细纵纹并含胶质物。花果期8-10月。
产内蒙古昭乌达盟、翁牛特（乌丹）旗及河北北部围场附近；生于流动及半固定沙丘上。模式标本采自内蒙古翁牛特旗（乌丹）。
本种根粗而长，茎与枝粗而多，常形成大的密丛，耐旱性强，抗风、固沙性能好，果壁含胶质物，吸水即膨胀，可胶结沙粒及保水，利于种子萌发，也可作固沙的先锋植物。适于飞机播种。茎、枝可作固沙的沙障或编筐用。
标本份数
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