攀枝花苏铁的核型分析

 This paper reports chromosome  number  and karyotype  analysis  of Cycas panzhihuaensis endemic to China.  The material was collected from Dukou, Si- chuan. It is a diploid species, with 2n=22=2m+4sm+4st+l2t. The karyotype of Cycas panzhihuaensis is different from that of the other species of the genus Cycas, which was known to be 2n=4m+8st+10t.  The former is a new karyotype in the genus.  The authors briefly discuss karyotype evolution of the genus Cycas in this papar.     

中国二叠纪苏铁科新属、种——古生铁花

本文是继中国始苏铁Primocycas chinensis Zhu  et  Du之后，又报道一种古植物文献未见记载的早二叠世晚期苏铁科小孢子叶球，命名为古生铁花(新属、种)Cycadostrobilus  paleozoicus  Zhu，gen. et.sp．nov．标本采自我国山西省太原市东山煤矿的下石盒子组，它是世界迄今已知的一种最古老的小孢子叶球化石。和本新属同层发现的化石，除了中国始苏铁之外，还有楔叶Sphenophyllum、齿叶Tingia，楔羊齿Sphenopteris、楔叶羊齿Sphenopteridium、织羊齿Emplectopteris、栉羊齿Pecopteris、大芦孢穗Macrostachya、科达Cordaites、带羊齿Taeniopteris、角籽Cornucarpus和几种也未见记载而形态又非常特殊的植物。本文认为当前报道的古生铁花(新属、种)很可能和中国始苏铁同属一种植物，其营养叶可能是疏脉带羊齿Taeniopteris norinii Halle。     

中国新发现的几种红藻(Ⅰ)

在研究我国产的伊谷藻目Ahnfeltiales和杉藻目Gigartinales的种类过程中,发现了属于这2个目的4个新种,即莺歌海伊谷藻Ahnfeltia yinggehaiensis Xia et zhang ,广东拟伊藻Ahnfeltiopsis guangdongensis Xia et zhang,海南拟伊藻Ahnfeltiopsis hainanensis Xia et zhang和马氏拟伊藻Ahnfeltiopsis masudai Xia et zhang。     

中国新发现的几种红藻(Ⅱ)

在研究我国产的杉藻目和红皮藻目的种类过程中,发现属于这两个目的4个新种,它们是西沙腹 根藻Tenaciphyllum xishaense Xia et Wang,网状隐蜘藻Cryptarachne reticulata Xia et Wang,西沙网囊藻Fau-chea xishaensis Xia et Wang和海南红皮藻Rhodymenia hainanensis Xia et Wang。     

广东产业转移动因及效应研究

产业转移是地区经济发展的一种规律,广东产业转移旨在协调区域经济,实现产业结构调整、优化升级.广东产业转移有利于珠三角地区产业结构调整、优化升级,整合地区资源,扩大市场份额;拉动东西两翼和山区经济增长,促进就业,提高资源利用率;形成产业集聚、结构优化与产业升级;技术溢出效应与建立创新体系.但产业转移过程中也存在产业空心化和环境污染等问题.     

红河苏铁和元江苏铁的著者考证

The names Cycas hongheensis and C. parvula were not validly published in 1994 when they were first proposed, but were validated in 1996 by a different author.     

越南篦齿苏铁小孢子发生及其系统学意义

运用常规石蜡切片方法，结合显微荧光技术对越南篦齿苏铁Cycas elongata 小孢子发生和花粉个体发育进行了研究。结果表明：其小孢子叶球5月中下旬开始萌动，小孢子囊着生在小孢子叶远轴面，且3-5小孢子囊以辐射状排列方式聚生成聚合囊。小孢子囊壁由6-7层细胞组成，包括表皮、中层及绒毡层。绒毡层来源于成熟造孢组织的外围细胞，其退化形式为分泌型。6月中旬，小孢子母细胞进入减数分裂I，至6月下旬形成四分体。母细胞减数分裂后胞质分裂的方式与其他苏铁类植物不同，具有连续型与同时型两种类型。7月中旬，小孢子经过2次有丝分裂后，形成3细胞的成熟花粉粒。7月下旬进入散粉状态。在花粉发育过程中，母细胞内淀粉粒的积累及其壁上胼胝质的沉积均呈现规律性变化。     

中国金粟兰科植物拾遗

In the present paper the longstanding confusion of three uncertain spe- cies of Chloranthus, C. monostachys R. Br., C. pernyanus Solms-Laub. and C. kiangsien- sis Metcalf is clarified.  In addition to the new record of C. nervosus Coll. et Hemsl. to the flora of China, the distributional ranges of Sarcandra hainanensis (Pei) Swamy et Bailey and Hedyosmum orientale Merr. et Chun are also found to be much bigger than previously known.     

国产三角瓣花属(茜草科)订正

三角瓣花属Prismatomeris Thw．在Hooker(1873)和K．Schumann(1891)的茜草   科分类系统中隶于巴戟族Morindeae Miq．但在 Bremekamp(1966年)的分类系统中，其分类   位置未定。本属的胚根下位，花冠裂片镊合状排列和具针晶等特征与巴戟族相同，但它的花   离生，子房2室，胚珠盾形而着生于子房隔膜上半部等特征则与巴戟族明显不同。  因此，   将本属分立作族并置于Bremekamp所定界的茜草亚科Rubioideae中似乎较合适。  本文还提   供了经挑选的本属10对特征及其分类价值的说明。辨别了两个种：(1)将分布于中国的P.   tetrandra(Roxb．)K．Schum. 修订为 “P.tetrandra  (Roxb.)  K.  Schum. subsp. multiflora   (Ridley，)Y．Z．Ruan”. (2)P.  connata Y．  Z.  Ruan 被记述作新种它的热带新亚种是  P.  connata Y．  Z．  Ruan  subsp.  hainanensis Y．  Z．  Ruan。     

海桑属的新分类群

Sonneratia, a small genus of Sonneratiaceae, is widely distributed throughout SE. Asia, E. Africa and N. Australia, extending from 18˚S. to 20˚N. and from 45˚ to 150˚E. In China it occurs only in the Hainan Island. In this paper,  two new sections areproposed and six species are recognized, of which one is described as new.     

中国齿鳞草属和假野菰属的订正

The present paper deals with taxonomic studies on the genera Lathraea Linn. and Christisonia Gard. (Orobanchaceae) in China.  In the genus Lathraea, only a single species in China, L. japonica Miq., is recongnized in the paper. It occurs in sou- thern Shaanxi, southern Gansu, southeastern Sichuan, northern Guizhou and northern   Guangdong, also in Japan. L. miqueliana Franch. et Sav., L. chinfushanica Hu et Tang and L. japonica Miq. var. miqueliana (Franch. et Sav.) Ohwi are treated as new synon- yms of L. japonica Miq. in this paper.       In the genus Christisonia, the most of collections from China, which were identi- fied as C. sinensis G. Beck before, are treated as a new synonym of C. hookeri C. B. Clarke.  A few collections of this genus from China, which were mistakenly described as Gleadovia lepoense Hu snd G. kwangtungense Hu, should be transferred to Christi- sonia hookeri C. B. Clarke.  It is distributed in southeastern and south China, westwards to the Himalayas.