五种黄芪属植物的核型分析

The karyotypes of five species in Astragalus (A. dahuricus DC., A. mongolicus Bunge., A. adsurgens Pall., A. melilotoides Pell., A. huangheensis H. C. Fu., Y. H. Liu) were studied.  Among them, the karyotypes of A. dahuricus and A. melilotoides are re- ported for the first time.  While A. melilotoides is tetraploid (2n=4X=32), all the others are found to be diploid (2n= 2X = 16).  Based on the comparison of karyotypes, the evolu-tionary order of these 5 species is discussed.     

内蒙古顶冰花属（百合科）一新种

报道了产于贺兰山的顶冰花属（百合科）一新种——贺兰山顶冰花Gagea alashanica Y. Z. Zhao & L. Q. Zhao。该种因柱头头状，鳞茎外皮上端向上延伸成圆筒状，抱茎，无附属小鳞茎，植物除基生叶外，茎上具有3-4枚附生叶，无明显总苞片而与新疆顶冰花G. neopopovii Goloskokov相似，但基生叶2枚，半圆筒形;鳞茎外皮向上延伸较短，长约2. 5cm，易于区别。     

葡萄属一新种

One new species of the genus Vitis (Vitaceae) is described from Anhui Province, China. It is vitis jinzhainensis X. S. Shen.     

绞股蓝属一新种

One new species of the genus Gynostemma, G. pallidinerve Z. Zhang, is described  from southeastern Anhui, China.     

甘肃天门冬属一新种

Asparagus dolichorhizhomatus J.M.Ni et R.N. Zhao (Liliaceae) is des-cribed as new from Gansu Province, China.      

西藏五福花属一新种和一新记录种

A new species and a new record for China of the genus Adoxa L.are reported from Xizang, China. They are Adoxa xizangensis G.Yao and Adoxa inodora (Falc.ex C.B.Clarke)  Nepomn.     

四川葱属二新种

 This  paper  reports two new species of Allium  L. from Sichuan, A. xiangchengense J. M. Xu and A.guanxianense J. M. Xu. The former is related to A. hookeri Thwaites, but differs from it by its lanceolate to linear-lanceolate leaves with evidently contracted base and filaments longer than the tepals, while the latter is related to A.chienchuanense J. M. Xu, but differs from it by its termi- nal scape, filaments shorter than the tepals and ovary with solitary ovule in eachlocule.     

四川葱属一新种及其核型

本文分析了该新种的核型，其核型公式为K(2n)＝2x＝16=14m+2st(2SAT)，具一对居间随体，有时该居间随体不明显。核型的不对称性为2A型。