田野千里光Senecio oryzertorum Diels
田野千里光Senecio oryzertorum Diels
62.田野千里光
Senecio oryzertorum Diels in Not. Bot. Gard. Edinb. 5: 194. 1912; Hand. -Mazz. Symb. Sin. 7: 1123. 1936; S. Y. Hu in Quart. Journ. Taiwan Mus 21: 135. 1968; C. Jeffrey et Y. L. Chen in Kew Bull. 39 (2): 430. 1984.
一年生草本。茎单生，直立，高20-30厘米，自基部或上部分枝，被疏柔毛至近无毛。叶无柄，全形倒披针状线形，长3-8厘米，宽1-2厘米，顶端尖或稍尖，具较疏的粗齿或羽状浅裂；侧生裂片3-5对，线形或线状长圆形，尖，具疏齿或全缘，斜上或开展；下部叶狭成柄状叶基；中部及上部叶无柄，基部具耳，纸质，两面有疏柔毛至多少无毛；上部叶较小，线形，具齿。头状花序有舌状花，少数至多数，排列成顶生伞房花序；花序梗细，长5-10毫米，近无毛，具数个线状披针形小苞片。总苞狭钟状，长5-6毫米，宽2.5-3毫米，具外层苞外；苞片3-4，线状钻形，极短；总苞片13-15，线状披针形，宽0.3-0.5毫米，中部或中上部合生，顶端尖，草质，边缘狭膜质。舌状花3；管部长2毫米；舌片黄色，极小，长圆形，顶端有3细齿，具3几脉；管状花多数；花冠黄色，长3.5毫米，管部长2毫米，檐部狭漏斗状，短于管部；裂片三角状卵形，长0.5毫米，稍钝。花药线形，长0.8毫米，基部有极短的钝耳；附片卵形；花药颈部柱状，向基部膨大；花柱分枝长0.3毫米，顶端截形，有乳头状毛。瘦果圆柱形，长2.5-2.8毫米，有疏微毛；冠毛白色，长3毫米，毛基部扩大。花期5月。
产云南（腾冲、大理、丽江）。生于海拔1500-2400米的潮湿开旷草地或牧场。模式采自大理。
本种的总苞片在中部或中部以上合生；舌状花少数（3）；冠毛基部常扩大，极易与其他一年生的种类相区别。在分布上仅见于云南西北部。
《Flora of China》 Vol. 20-21 (2011)
64. Senecio oryzetorum Diels, Notes Roy. Bot. Gard. Edinburgh. 5: 194. 1912.
田野千里光 tian ye qian li guang
Herbs, annual. Stems erect, 20-30 cm tall, branching from base or in upper part, sparsely pubescent to subglabrous. Leaves oblanceolate-linear to oblong-linear, 3-8 × 1-2 cm, papery, sparsely pubescent to ± glabrous, lower ones attenuate into a petioloid base, middle and upper ones sessile, basally scarcely auriculate, margin somewhat remotely coarsely dentate or pinnatifid with 6-10 linear to shortly linear-oblong, acute, remotely denticulate or entire, ascending-spreading lateral lobes, apex acute or subacute. Capitula radiate, few to many, terminal, corymbose; peduncles 5-10 mm, slender, subglabrous, with a few linear-lanceolate bracteoles. Involucres narrowly campanulate, 5-6 × 2.5-3 mm, calyculate; bracts of calyculus 3 or 4, linear-subulate, inconspicuous; phyllaries 13-15, linear-lanceolate, 0.3-0.5 mm wide, connate to middle or above, herbaceous, glabrous, margin narrowly hyaline, apically acute. Ray florets 3; corolla tube ca. 2 mm; lamina yellow, minute, 1-1.5 mm, 3-veined, 3-denticulate. Disk florets many; corolla yellow, ca. 3.5 mm, with ca. 2 mm tube and narrowly funnelform limb; lobes ovate-triangular, ca. 0.5 mm, apically subobtuse. Anthers ca. 0.8 mm, basally very shortly obtuse-auriculate, appendages ovate; antheropodia dilated toward base. Style branches ca. 0.3 mm. Achenes cylindric, 2.5-2.8 mm, sparsely minutely pubescent. Pappus white, ca. 3 mm, bristles expanded at base. Fl. May.● Open wet pastures; 1500-2400 m. NW Yunnan.
别名：大白顶草;苦麻菜;
科名：菊科 Compositae
属名：千里光属 Senecio
62.田野千里光
Senecio oryzertorum Diels in Not. Bot. Gard. Edinb. 5: 194. 1912; Hand. -Mazz. Symb. Sin. 7: 1123. 1936; S. Y. Hu in Quart. Journ. Taiwan Mus 21: 135. 1968; C. Jeffrey et Y. L. Chen in Kew Bull. 39 (2): 430. 1984.
一年生草本。茎单生，直立，高20-30厘米，自基部或上部分枝，被疏柔毛至近无毛。叶无柄，全形倒披针状线形，长3-8厘米，宽1-2厘米，顶端尖或稍尖，具较疏的粗齿或羽状浅裂；侧生裂片3-5对，线形或线状长圆形，尖，具疏齿或全缘，斜上或开展；下部叶狭成柄状叶基；中部及上部叶无柄，基部具耳，纸质，两面有疏柔毛至多少无毛；上部叶较小，线形，具齿。头状花序有舌状花，少数至多数，排列成顶生伞房花序；花序梗细，长5-10毫米，近无毛，具数个线状披针形小苞片。总苞狭钟状，长5-6毫米，宽2.5-3毫米，具外层苞外；苞片3-4，线状钻形，极短；总苞片13-15，线状披针形，宽0.3-0.5毫米，中部或中上部合生，顶端尖，草质，边缘狭膜质。舌状花3；管部长2毫米；舌片黄色，极小，长圆形，顶端有3细齿，具3几脉；管状花多数；花冠黄色，长3.5毫米，管部长2毫米，檐部狭漏斗状，短于管部；裂片三角状卵形，长0.5毫米，稍钝。花药线形，长0.8毫米，基部有极短的钝耳；附片卵形；花药颈部柱状，向基部膨大；花柱分枝长0.3毫米，顶端截形，有乳头状毛。瘦果圆柱形，长2.5-2.8毫米，有疏微毛；冠毛白色，长3毫米，毛基部扩大。花期5月。
产云南（腾冲、大理、丽江）。生于海拔1500-2400米的潮湿开旷草地或牧场。模式采自大理。
本种的总苞片在中部或中部以上合生；舌状花少数（3）；冠毛基部常扩大，极易与其他一年生的种类相区别。在分布上仅见于云南西北部。
《Flora of China》 Vol. 20-21 (2011)
64. Senecio oryzetorum Diels, Notes Roy. Bot. Gard. Edinburgh. 5: 194. 1912.
田野千里光 tian ye qian li guang
Herbs, annual. Stems erect, 20-30 cm tall, branching from base or in upper part, sparsely pubescent to subglabrous. Leaves oblanceolate-linear to oblong-linear, 3-8 × 1-2 cm, papery, sparsely pubescent to ± glabrous, lower ones attenuate into a petioloid base, middle and upper ones sessile, basally scarcely auriculate, margin somewhat remotely coarsely dentate or pinnatifid with 6-10 linear to shortly linear-oblong, acute, remotely denticulate or entire, ascending-spreading lateral lobes, apex acute or subacute. Capitula radiate, few to many, terminal, corymbose; peduncles 5-10 mm, slender, subglabrous, with a few linear-lanceolate bracteoles. Involucres narrowly campanulate, 5-6 × 2.5-3 mm, calyculate; bracts of calyculus 3 or 4, linear-subulate, inconspicuous; phyllaries 13-15, linear-lanceolate, 0.3-0.5 mm wide, connate to middle or above, herbaceous, glabrous, margin narrowly hyaline, apically acute. Ray florets 3; corolla tube ca. 2 mm; lamina yellow, minute, 1-1.5 mm, 3-veined, 3-denticulate. Disk florets many; corolla yellow, ca. 3.5 mm, with ca. 2 mm tube and narrowly funnelform limb; lobes ovate-triangular, ca. 0.5 mm, apically subobtuse. Anthers ca. 0.8 mm, basally very shortly obtuse-auriculate, appendages ovate; antheropodia dilated toward base. Style branches ca. 0.3 mm. Achenes cylindric, 2.5-2.8 mm, sparsely minutely pubescent. Pappus white, ca. 3 mm, bristles expanded at base. Fl. May.● Open wet pastures; 1500-2400 m. NW Yunnan.