Sinosenecio nanchuanicus (Asteraceae), a New Species Small in Size Yet High in Chromosome Number from Chongqing, China
Sinosenecio nanchuanicus (Asteraceae), a New Species Small in Size Yet High in Chromosome Number from Chongqing, China
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发表时间：
2011
影响因子：
3.4
通讯作者：
Zhengya Liu;Y. Liu;Qin‐Er Yang
中科院分区：
文献类型：
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作者：
Zhengya Liu;Y. Liu;Qin‐Er Yang
南川千里光Y. Liu，Y. Liu & Q. E.本文描述了重庆菊科一新种--杨氏菊科。其染色体数目为2n=144。该新种与S. bodinieri（Vaniot）B.诺德，2n=48的二倍体种，在姿态、圆形或近圆形叶片、无毛子房和具冠毛的瘦果上，但在较小的身材、较小的叶片浅有规则的5-7裂和上面的深色绿色、上面凹陷的脉、头状花序持续单生和顶生、射线14-15和高染色体数目上不同。来自酿脓链球菌palmatilobus（Kitam.）C. Jeffrey & Y.L. Chen它也通过这些特征不同，另外，通过它的叶片圆形或近圆形的轮廓（对宽卵形）和短缘毛沿着边缘（对长缘毛）。所有的分类群都归入S. bodinieri和S. palmatilobus进行了仔细的重新检查，并与S.南川鱼画线图、分布图、光镜照片。nanchuanicus的彩色照片。bodinieri，S. nanchuanicus和S.提供了掌状叶。
Sinosenecio nanchuanicus Z. Y. Liu, Y. Liu & Q. E. Yang, a new species of the Asteraceae from Chongqing, China, is described and illustrated. Its chromosome number (2n=144) is reported here. This new species is similar to S. bodinieri (Vaniot) B. Nord., a diploid species with 2n=48, in the posture, the rotundate or subrotundate leaf-lamina, the glabrous ovaries, and the pappose achenes, but differs in the smaller stature, the smaller leaf-lamina shallowly regularly 5-7-lobed and dark green above, the veins sunken above, the capitula constantly solitary and terminal, the rays 14-15, and the high chromosome number as well. From S. palmatilobus (Kitam.) C. Jeffrey & Y.L. Chen it differs also by these characters and, additionally, by its leaf-lamina rotundate or subrotundate in outline (vs. broadly ovate) and short-ciliate along the margin (vs. longciliate). All the taxa put in synonymies under S. bodinieri and S. palmatilobus were carefully re-examined and compared to S. nanchuanicus. Line drawings, distribution map, light microscope (LM) microphotographs of floral characters of S. nanchuanicus, color photographs of S. bodinieri, S. nanchuanicus and S. palmatilobus are provided.