前胡族花粉外壁超微结构及其系统学意义(英文)

Transmission electron microscopy (TEM) observation of pollen grains of 18 species belongingto 18 respective genera of the tribe Peucedaneae Drude revealed distinct ultrastructural difference in thepollen exine, including the thickness and features of rectum, columnar layer, foot layer and endexine. Thesystematic position of those 18 species are re-evaluated based on their ultrastructural characteristics ofpollen exine observed in this study. Seven genera related to Angelica L. in Angelicinae Drude have beendeduced to genus Angelica L. For example, Osterfcum grosseserratum (Maxim.) Kitagawa was changed toAngelica L. by some authors, but it differs from Angelica sinensis (Oliv.) Diels in having well developedtectum which is thicker than the columnar layer and foot layer. Its columnar layer is quite well-developedwith long and branched columellae. Besides its surface is tuberculated. Evidently, its development exceedsthat of Angelica sinensis. However, it is only a moderate evolutional species in its genus, and the Angelicasinensis accounts as the most advanced species in Angelica Diels, thus, placing genus Ostencum Hoffm.in Angelica L is not suitable, it may be more appropriate to keep its original position. In addition, Ferulaakitschkensis B. Fedtsch. ex K.-Pol. differs greatly from those of Talassia transiliensis (Herd.) Korov. andSchumannia turcomnnia Kuntze, because of its very well-developed columnar layer, being about four tofive times thicker than the total of tectum and foot layer, tuberculated tectum surface and complicatedstructure of columnellae. As another species Heracleum forrestJ‘iWolff also differs from Semenovia rubtzovii(Schischk.) Monden. in having an even thickness of exine and well-developed columnar layer, it seemssuitable that they should also be treated as two independent genera.     

中国伞形科八个属的花粉形态研究

本文对我国伞形科8属22种和1变种的花粉,除用光学显微镜进行了系统 的观察外,并用扫描电子显微镜观察了它们外壁的细微结构,在综合分析对比的基础上,论证了花粉形态研究在伞形科分属水平上的意义。     

中国伞形科两新种

本文记载了产于我国云南的亮蛇床属植物新种长萼亮蛇床和四川前胡属新种木里前胡。     

弓翅芹属——伞形一科新属

复伞形花序分枝极多,侧伞形花序长度往往超过中央主伞形花序,组成为许多总状花丛,无总苞片和小总苞片,有时偶有1总苞片,但为膜质,脱落性;伞辐少数,纤细,极不等长,十分开展;每小伞形花序具少数     

中国伞形科特有属的核型演化及地理分布

首次报道了我国伞形科１０个特有属９种１变种１４个居群的核型,染色体基数分别为ｎ＝６,８,１０和１１,核型类型有２Ａ,３Ａ和４Ａ三种类型。根据各属的核型演化水平并结合其花粉形态,初步确定东俄芹属（Ｔｏｎｇｏｌｏａ）、环根芹属（Ｃｙｃｌｏｒｈｉｚａ）、明党参属（Ｃｈａｎｇｉｕｍ）和川明参属（Ｃｈｕａｍｉｎｓｈｅｎ）是古特有属,其余各属则处于中等或较高的演化水平上。同时初步讨论了各特有属在伞形科分类系统中的核型演化关系并比较了各主要分布区之间核型的演化水平,发现横断山地区不仅特有属数目高,染色体基数变化大,且集中了核型较为原始和演化程度很高的类群,极可能是伞形科特有属的起源和分化中心。     

羌活属一新种

本文记载了中国伞形科特有属羌活属１新种细叶羌活