Sinosenecio sichuanicus (Asteraceae), A New Species from Sichuan, China

中國四川產蒲兒根屬一新種：四川蒲兒根

劉瑩(Ying Liu) ； 楊親二(Qin-Er Yang)

《Botanical Studies》 52卷2期 (2011/04) Pp. 219-223

摘要

本文描述了中國四川產蒲兒根屬一新種：四川蒲兒根(Sinosenecio sichuanicus Y. Liu & Q. E. Yang)。本新種在葉片形狀，成熟瘦果通常無冠毛方面與雨農蒲兒根(Sinosenecio chienii (Hand.-Mazz.) B. Nord.)相似，但以具2-3莖生葉，葉片兩面及葉柄被柔毛，舌片較大(18-20×4-5 mm)而與後者相區別。其體細胞染色體數目為2n=60。本文提供了四川蒲兒根以及雨農蒲兒根的彩色圖版、四川蒲兒根的線繪圖、花部微觀性狀的光鏡照片以及地理分佈圖。

關鍵字

菊科 ； 染色體數目 ； 千里光族 ； 四川蒲兒根

並列摘要

Sinosenecio sichuanicus Y. Liu & Q. E. Yang, a new species from Sichuan, China, is described and illustrated. The new species is similar to S. chienii (Hand.-Mazz.) B. Nord. in the leaf shape and the mature achenes usually epappose, but differs by having 2-3 cauline leaves, the leaf-lamina pubescent on both surfaces, the petioles pubescent, and the rays larger, 18-20 × 4-5 mm. Its somatic chromosome number (2n = 60) is reported here. Photographs of both S. sichuanicus and S. chienii, line drawings, distribution map, and light microscope (LM) microphotographs of floral characters of S. sichuanicus are provided.

並列關鍵字

Asteraceae ； Chromosome number ； Senecioneae ； Sinosenecio sichuanicus