中国云南象牙参属(姜科)一新种——苍山象牙参

描述了中国云南姜科Zingiberaceae一新种——苍山象才参Roscoea cangshanensisM．H．LUO,X．F．Gao＆H．H．Lin。该种与大理象牙参R．forrestii Cowley在体态上相近,但唇瓣深裂成2裂片,每个裂片再2裂,基部收缩成具白色条纹的柄,叶片较狭窄,（2-）7-24×1．5-2．5cm,叶片基部狭缩成叶柄状而不同。该新种叶片基部狭缩成叶柄状,唇瓣倒卵状楔形,长2．5-3．5cm,宽2．5-3．0cm,基部收缩成具白色条纹的柄,与长柄象牙参R．debilis Gagnep．相似,但苞片非管状,较短,长5-15mm,隐藏于叶鞘内,花冠管较长,10-12.5cm,唇瓣深裂成2裂片,每个裂片再2裂,可与后者明显区别。     

中国浙江合叶苔属(合叶苔科)一新种——毛茎合叶苔

描述了采自中国浙江九龙山的苔类植物一新种——毛茎合叶苔Scapania paraphyllia T.Cao,C．Gao,J．Sun＆B．R．Zuo。该新种与腋毛合叶苔S.bolanderiAust．相近,两种皆具带齿叶片和假鳞毛,但新种具如下特征可与腋毛合叶苔区别：（1）植物体小,通常红色;（2）假鳞毛多数,不分枝,不仅生于叶腋,茎上也有着生;（3）背脊为腹瓣长的1/4-1／3,背瓣为腹瓣大小1／2-1／3;（4）叶角质层表面粗糙,具粗瘤,直径达6-8μm。与另一个相似种sampliata Steph．相比,因新种具有粗糙的叶表面和假鳞毛等特征,也易于区别。     

蜘蛛抱蛋属（百合科）二新种

报道了在广西发现的2个百合科蜘蛛抱蛋属Aspidistra新种,即乳突蜘蛛抱蛋A. papillata G. Z. Li和环江蜘蛛抱蛋A. huanjiangensis G. Z. Li&Y. G. Wei。乳突蜘蛛抱蛋与大花蜘蛛抱蛋A. tonkinensis（Gagner. ）F. T. Wang&K. Y. Lang近缘。它们的共同特征是:花单生;花被裂片两侧彼此覆盖;柱头盾状,边缘3裂,上表面具3条辐射状沟缝。不同点是:乳突蜘蛛抱蛋植株较大花蜘蛛抱蛋的粗大;叶柄较粗;叶片椭圆形或长椭圆形;花被阔钟     

独龙虾脊兰（兰科）的合格发表

通过补充拉丁文描述和指定模式,本文合格发表了独龙虾脊兰Calanthe dulongensis H. Li, R. Li & Z. L. Dao。该种因其唇瓣中裂片上有3个具短柄的金黄色球状附属物而有别于本属的其他类群。本种在体态上与疏花虾脊兰C. henryi Rolfe和车前虾脊兰C. plantaginea Lindl.相近,不同之处在于本种的根状茎明显,花瓣倒卵状披针形 ,中萼片无毛;本种在体态上也与三褶虾脊兰C. triplicata (Willem.) Ames相近,区别在于本种的唇     

四川无心菜属（石竹科）一新种

描述了四川无心菜属（石竹科）一新种——道孚无心菜Arenaria dawuensis A. J. Li&Q. Ban。该种具纺锤形根,聚伞花序,花柱2,线形而与纟遂瓣无心菜A. fimbriata（E. Pritz. ）Mattf. 相近,但叶匙形,萼片边缘具长缘毛,花瓣短于萼片,顶端细流苏状而不同。     

中国云南秋海棠属(秋海棠科)一新种——假侧膜秋海棠

描述了中国云南秋海棠科Begoniaceae秋海棠属Begonia扁果组sect．Platycentrum的一新种——假侧膜秋海棠Begonia coelocentroides Y.M．Shui＆Z．D．Wei。该种与山地秋海棠B．oreodoxa Chun＆F．Chun相似,子房上部为侧膜胎座,但雌花被片5,蒴果最大翅舌形,长20-22mm,而易于区别。     

云南龙血树属(龙舌兰科)一新种——深脉龙血树

描述了龙血树属Dracaena一新种--深脉龙血树D. impressivenia Y. H. Yan &; H. J. Guo, 并绘了线图。该种产于中国云南盈江县, 与矮龙血树D. terniflora Roxb.叶形相似, 但侧脉深陷, 总状花序上具许多每6-9朵簇生的花, 苞片暗红色, 花被伸直, 长3-3.5 cm, 可与后者明显区别。     

贵州卷柏属(卷柏科)一新种——习水卷柏

描述了贵州卷柏属一新种,即习水卷柏Selaginella xishuiensis G. Q. Gou &; P. S. Wang。新种与蔓出卷柏S. davidii Franch.在体态和大小方面相近,但叶缘具睫状毛而不同;新种在体态上也与地卷柏S. prostrata H. S. Kung相似,但孢子叶一型而不同。     

兰属腋花组若干种类的研究

对新种丽花兰Cymbidium concinnum Z. J. Liu &; S. C. Chen和新变种龙州兰C. eburneum var. longzhouense Z. J. Liu &; S. C. Chen进行了描述和绘图; 丽花兰与大雪兰C. mastersii Griff. ex Lindl.有亲缘关系, 区别点在于新种叶片先端不分裂, 花序具18-22朵花, 唇瓣中裂片上有一个V型的紫红色斑块; 龙州兰(变种)与独占春(原变种)的主要区别在于唇瓣中裂片上和侧裂片顶部有较密的紫红色斑。对象牙白C. maguanense的分类问题进行了讨论, 并为其指定了新模式; 还为腋花组sect. Eburnea国产种类提供一个检索表。     

湖北无心菜属(石竹科)一新种——神农架无心菜

描述了湖北省神农架地区发现的石竹科一新种——神农架无心菜Arenaria shennongjiaensis Z. E. Zhao &; Z. H. Shen,并绘出了线图。该种与秦岭无心菜A. giraldii (Diels) Mattf.相近,为柔弱草本,具纺锤形块根,花瓣顶端齿裂;不同之处在于其茎有1列腺毛,花瓣顶端具4齿裂,裂片又2浅裂。     

云南节肢蕨属(水龙骨科)一新种——贯众叶节肢蕨

报道了产于中国云南高黎贡山的水龙骨科Polypodiaceae节肢蕨属Arthromeris一新种——贯众叶节肢蕨A.cyrtomioides S.G Lu＆C.D.Xu。该新种的植标大小与节肢蕨A .lehmanni（Mett.）Ching相似。但叶片的背面密被绒毛,表面被短柔毛,侧生羽片9-16对。该新种在毛被方面与厚毛羽毛节肢蕨A.tomentosa W.M.Chu相似,但羽片边缘无软骨质的膜质边,侧生羽片多达9-16对。     

Plagiochila virginica A.Evans rather than P. dubia Lindenb. & Gottsche occurs in Macaronesia; placement in sect. Contiguae Carl is supported by ITS sequences of nuclear ribosomal DNA

 Plagiochila dubia Lindenb. & Gottsche is reduced to a synonym of the Neotropical P. patula (Sw.) Lindenb. Specimens from the Canary Islands and Madeira proved to belong to the eastern North American P. virginica A.Evans, new to Europe. Phylogenetic analyses of the internal transcribed spacer regions (ITS1-5.8S-ITS2) of nuclear ribosomal DNA of ten Plagiochila species produced four independent lineages that are well supported by all bootstrap analyses (maximum likelihood, maximum parsimony, and distance). These lineages correspond with the Plagiochila sections Arrectae, Contiguae, Cucullatae and Glaucescentes. Spruce's “Ramiflorae” and “Cauliflorae” may no longer be regarded as monophyletic units of Plagiochila. Received August 19, 2001 Accepted October 11, 2001     

中国珍珠菜属(报春花科)一新种——右旋过路黄

对新种右旋过路黄Lysimachia dextrorsiflora X. P. Zhang, X. H. Guo &; J. W. Shao进行了描述和绘图。该新种产于中国安徽和福建, 因茎匍匐, 叶对生, 花黄色, 单生叶腋与过路黄L. christinae Hance近缘, 但其花冠裂片在蕾期右旋(顺时针)旋转排列(俯视), 花梗通常长于叶片与叶柄长之和, 花期4月初至5月初而不同。     

中国重庆毛茛科银莲花属一新种——涪陵银莲花

描述了中国重庆市涪陵区的毛莨科Ranunculaceae银莲花属Anemone一新种——涪陵银莲花A．fulingensisW.T．Wang＆Z．Y.Liu,并绘出墨线图。根据此新种的总苞苞片无柄,花具4-5枚萼片,花丝丝形,花粉具散沟等特征,可以确定此种应是属于银莲花属鹅掌草组Anemone sect．Stolonifera的一个成员;在该组中,此种以其独特的由2-10个块茎组成的念珠状根状茎而与该组的其他种相区别。鉴于在银莲花属中块茎出现于不同的演化路线中,以及这些块茎的出现系次生现象,可见此新种应是鹅掌草组的进化种。     

中国竹亚科镰序竹属一新种——匍匐镰序竹

报道了福建厦门园林植物园发现的中国竹亚科Bambusoideae镰序竹属一新种——匍匐镰序竹Drepanostchvum stotonfrme S．H．Chen＆Z．Z．Wang。该种与坝怕D．microphyllum（Hsueh＆Yi）Keng f.ex Y相似,区别在于本种植株藤本状极明显,竿匍匐状,较细,竿直径3-6mm,竿壁厚约lmm;全竿25-55节．竿基部数节节间长5-9cm,中部节间长13-18cm,节内长l-2mm;箨舌高约O．5mm,具长约2mm的纤毛：叶舌高约3mm,具长约4mm纤毛;叶片较小,在成竹时长2-6cm,宽O．3-0．6cm,叶片次脉3-4对。     

深圳香荚兰,首次发现于华南深圳的兰科新种

对兰科新种深圳香荚兰Vanilla shenzhenicaZ．J．Liu＆S．C．Chen作了描述与绘图。此新种为深圳发现的第一个兰科新种,与台湾香荚兰V。somai Hayata有亲缘关系。但是,本新种花序具4花,花较大,不完全开放;唇瓣不裂,紫红色,基部与蕊柱合生长度达3/4,刷状附属物位于唇盘的上部,甚易区别于台湾香荚兰。     

中国湖南杜鹃花科杜鹃花属一新种——天门山杜鹃

报道了中国湖南天门山国家森林公园内发现的杜鹃花科Ericaceae杜鹃花属Rhododendron一新种——天门山杜鹃R．tianmenshanense C．L．Peng＆L．H．Yan。该种与雪山杜鹃R．aganniphum Balf.f.＆K．Ward近似,但以叶为长圆状椭圆形,叶背具两层毛被,上层为银白色短绒毛,下层为紧贴的鳞片状细毛,总花梗和花梗具密而短的腺毛,花常5朵组成总状花序而不同。该种隶属常绿杜鹃组大理杜鹃亚组sect．Ponticum subsect.Talienisa。     

Myrmechis bakhimensis D. Maity, N. Pradhan ＆ G. G. Maiti, a new species of Orchidaceae from Sikkim Himalaya

Myrmechis bakhimensis D. Maity,N. Pradhan & G. G. Maiti (Orchidaceae),a new species from Sikkim Himalaya,is described and illustrated. The new species most closely resembles M. japonica (Reichb.) Rolfe and M. chinensis Rolfe with similar shape and size of lamina and the “T”-shaped epichile,but differs by the perfectly glabrous and eciliate floral bract,5-nerved dorsal sepal,and emarginate,mucronate epichile.     

Cytogenetics of new Guizotia Cass. (Compositae) interspecific hybrids pertaining to genomic and phylogenetic affinities

 The following crosses were made using four recognized species/subspecies and a new population of Guizotia, referred to as Chelelu after the name of the locality in Ethiopia from which it was collected: G. scabra subsp. schimperi × Chelelu, Chelelu × G. scabra subsp. scabra, G. zavattarii × G. arborescens and Chelelu × G. zavattarii (all accessions with 2n=30). Plant morphology as well as mitotic and meiotic chromosome analysis confirmed the hybrid nature of the obtained progeny. At metaphase I of meiosis, the F₁ hybrid plants (2n=30) showed a mean of about 95%, 31%, 63% and 0.50% of the pollen mother cells with 15 bivalents, and a mean of about 14.95, 13.75, 14.40 and 7.86 bivalents per cell, respectively. The respective mean pollen stainability was about 67%, 19%, 31% and 2%. From the results it was concluded that Chelelu is more closely related to G. scabra subsp. schimperi than to G. scabra subsp. scabra but more to the latter than to G. zavattarii. Guizotia zavattarii and G. arborescens are closely related to each other. Based on the cytological observations made, the probable basic chromosome number for the genus is discussed. Received November 5, 1999 Accepted August 21, 2001