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1.
A new bicarpellate Buxus species, Buxus sirindhorniana W. K. Soh, M. von Sternburg, Hodk. & J. Parn., is described from northern Thailand. This is the first reported bicarpellate species of Buxus. The pollen morphology and the degree of pollen viability of the species are reported. DNA was extracted from herbarium samples and the internal transcribed spacer (ITS) region of nuclear ribosomal DNA sequenced. The palynological evidence and the phylogenetic reconstruction support the contention that this new species belongs to the genus Buxus. The morphological diversity of reproductive organs in the Buxaceae, in relation to this new species, is briefly discussed.  相似文献   

2.
Summary  Three closely affiliated species of Heterospathe Scheff. (H. elegans (Becc.) Becc., H. humilis Becc. and H. versteegiana Becc.) from New Guinea are revised. They are reduced to a single species which is divided into two subspecies, and the new combination H. elegans subsp. humilis (Becc.) M. S. Trudgen & W. J. Baker is made. The subspecies can be readily distinguished by their growth habit. Epitypes are designated for the three previously published names, as informative material on the habit is not included in the existing type specimens. A new, potentially related species is described as H. pullenii M. S. Trudgen & W. J. Baker.  相似文献   

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4.
Fourteen new species of palms (Arecaceae) from Madagascar are described and named, based on material collected over the last 15 years. Twelve species belong to the genus Dypsis, namely D. andilamenensis Rakotoarin. & J. Dransf., D. anjae Rakotoarin. & J. Dransf., D. betsimisarakae Rakotoarin. & J. Dransf., D. culminis Rakotoarin. & J. Dransf., D. dracaenoides Rakotoarin. & J. Dransf., D. gautieri Rakotoarin. & J. Dransf., D. gronophyllum Rakotoarin. & J. Dransf., D. jeremiei Rakotoarin. & J. Dransf., D. metallica Rakotoarin. & J. Dransf., D. reflexa Rakotoarin. & J. Dransf., D. sancta Rakotoarin. & J. Dransf. and D. vonitrandambo Rakotoarin. & J. Dransf. and two species belong to the genus Ravenea: R. beentjei Rakotoarin. & J. Dransf. and R. hypoleuca Rakotoarin. & J. Dransf. Despite the fact that most of these species have been recorded from protected areas that are difficult to access in the eastern region of Madagasacar, they are all threatened. Based on IUCN categories and criteria, seven are Critically Endangered and seven are Vulnerable.  相似文献   

5.
黄雪奎  覃营  谢高  刘演 《广西植物》2023,43(6):1006-1015
广西壮族自治区位于我国南部,气候湿润,生境复杂,具有丰富的物种多样性。该文报道广西兰科植物13个新记录种,即旗唇兰[Kuhlhasseltia yakushimensis(Yamamoto) Ormerod]、紫茎兰(Risleya atropurpurea King&Pantl.)、指柱兰(Stigmatodactylus sikokianus Maxim. ex Makino)、二尾兰(Vrydagzynea nuda Bl.)、深圳拟兰(Apostasia shenzhenica Z. J. Liu&L. J. Chen)、拟泰国卷瓣兰(Bulbophyllum nipondhii Seidenf.)、南岭叠鞘兰(Chamaegastrodia nanlingensis H. Z. Tian&F. W. Xing)、垂叶斑叶兰(Goodyera pendula Maxim.)、四腺翻唇兰(Hetaeria anomala Lindl.)、褐花羊耳蒜(Liparis brunnea Ormerod)、聚叶钗子股(Luisia appressifolia Av...  相似文献   

6.
黄雪玉  黄雪奎  农素芸  黄俞淞 《广西植物》2023,43(12):2234-2244
该文报道了17个广西新记录物种,即柔毛阴山荠[Yinshania henryi(Oliv.) Y. H. Zhang]、臭荠(Lepidium didymum L.)、小酸模(Rumexa acetosella L.)、浙江凤仙花(Impatiens chekiangensis Y. L. Chen)、贵州海桐(Pittosporum kweichowense Gowda)、越南圆叶梭罗树(Reevesia orbicularis Tardieu)、冬青叶鼠刺(Itea ilicifolia Oliv.)、窄叶枇杷(Eriobotrya henryi Nakai)、瘤枝密花树[Myrsine verruculosa(C. Chen) Pipoly&C. Chen]、毛腺萼木(Mycetia hirta Hutch.)、二萼丰花草[Spermacoce exilis(L. O. Williams) C. D. Adams]、滇苦菜(Picris divaricata Vaniot)、纤细通泉草(Mazus gracilis Hemsl.)、皱叶荚蒾(Viburnum rhytid...  相似文献   

7.
Two new species of Sloanea are described and illustrated: S. fasciculata D. Samp. & V. C. Souza and S. hatschbachii D. Samp. & V. C. Souza. Both species are endemic to the Atlantic Forest states of Espírito Santo and Paraná in Brazil. S. fasciculata is similar to S. hirsuta (Schott) Planch. ex Benth., but has a fasciculate inflorescence and deeply-divided stigma. S. hatschbachii is similar to S. lasiocoma K. Schum. with regard to the morphology of the leaves, flowers and inflorescence, which is a frondose-bracteate raceme, but can be differentiated by the size of the style, the extension of the connective, and the length of the sepals.  相似文献   

8.
桂西南喀斯特地区是广西也是中国生物多样性保护优先区域。基于该地区关键区域的深入调查,该文报道了广西被子植物新记录20种,即木姜叶征镒木[Wuodendron praecox(Hook. f.&Thomson) B. Xue, Y. H. Tan&X. L. Hou]、大果楠(Phoebe macrocarpa C. Y. Wu)、国楣铁线莲(Clematis fengii W. T. Wang)、方籽栝楼(Trichosanthes tetragonosperma C. Y. Cheng&Yueh)、枥叶花楸(Sorbus yunnanensis L. T. Lu)、长苞楼梯草(Elatostema longibracteatum W. T. Wang)、富宁槭(Acer paihengii Fang)、云南山茱萸(Cornus eydeana Q. Y. Xiang&Y. M. Shui)、长梗杜鹃(Rhododendron longipedicellatum Lei Cai&Y. P. Ma)、粉花安息香(Styrax roseus Dunn...  相似文献   

9.
Summary  Three new species of Abarema Pittier (Leguminosae) are described and illustrated: A. villosa Iganci & Morim, A. limae Iganci & Morim and A. barnebyana Iganci & Morim from the Brazilian states of Rio de Janeiro, Minas Gerais and Espírito Santo. A. villosa is similar to A. brachystachya (DC.) Barneby & J. W. Grimes, but has villous leaflets, a pilose and truncate ovary and a corolla three times longer than the calyx. Both A. limae and A. barnebyana resemble A. jupunba (Willd.) Britton & Killip in having rhombic leaflets and heteromorphic inflorescences, but are differentiated by leaflet size and indumentum, and pod size and shape.  相似文献   

10.
弓莉  罗建  林玲 《西北植物学报》2019,39(7):1325-1328
报道了西藏兰科植物6种分布新记录种,分别为石斛属( Dendrobium Sw.)的单葶草石斛( D. porphyrochilum Lindl.)、曲唇兰属[ Panisea (Lindl.) Steud.]的云南曲唇兰( P. yunnanensis S. C. Chen et Z. H. Tsi)、苹兰属( Pinalia Lindley)的长苞苹兰[ Pi. obvia (W. W. Smith) S. C. Chen & J. J. Wood]、白点兰属( Thrixspermum Lour.)的长轴白点兰[ T. saruwatarii (Hayata) Schltr.]和石豆兰属( Bulbophyllum Thou.)的柄叶石豆兰( B. apodum J. D. Hooker)、细柄石豆兰[ B. striatum (Griff.) Rchb. f.],并附有新记录种的描述及特征照片。凭证标本保存于西藏高原生态研究所标本室(XZE)。  相似文献   

11.
12.
Gongora, J., Cuddahee, R. E., do Nascimento, F. F., Palgrave, C. J., Lowden, S., Ho, S. Y. W., Simond, D., Damayanti, C. S., White, D. J., Tay, W. T., Randi, E., Klingel, H., Rodrigues‐Zarate, C. J., Allen, K., Moran, C. & Larson, G. (2011). Rethinking the evolution of extant sub‐Saharan African suids (Suidae, Artiodactyla). —Zoologica Scripta, 40, 327–335. Although African suids have been of scientific interest for over two centuries, their origin, evolution, phylogeography and phylogenetic relationships remain contentious. There has been a long‐running debate concerning the evolution of pigs and hogs (Suidae), particularly regarding the phylogenetic relationships among extant Eurasian and African species of the subfamily Suinae. To investigate these issues, we analysed the mitochondrial and nuclear DNA sequences of extant genera of Suidae from Eurasia and Africa. Molecular phylogenetic analyses revealed that all extant sub‐Saharan African genera form a monophyletic clade separate from Eurasian suid genera, contradicting previous attempts to resolve the Suidae phylogeny. Two major sub‐Saharan African clades were identified, with Hylochoerus and Phacochoerus grouping together as a sister clade to Potamochoerus. In addition, we find that the ancestors of extant African suids may have evolved separately from the ancestors of modern day Sus and Porcula in Eurasia before they colonised Africa. Our results provide a revision of the intergeneric relationships within the family Suidae.  相似文献   

13.
This paper continues the publication of newly obtained results from a continuing taxonomic investigation of the genus Aspidistra in Laos and Vietnam. It includes illustrated diagnoses of two new species, A. melanaster Aver., K.S. Nguyen & Tillich, A. obliqua K.S. Nguyen & Aver., two new varieties, A. semiaperta Aver. & Tillich var. globulifera Aver., K.S. Nguyen & Tillich, A. lutea Tillich var. luteo-rubra K.S. Nguyen, Aver. & Tillich, and notes on two species, A. austroyunnanensis G.W. Hu, Lei Cai & Q.F. Wang and A. hekouensis H. Li, C.L. Long & Bogner newly recorded in the flora of Vietnam. Color illustrations, new or updated data on morphology, ecology, phenology, tentative relationships, distribution and conservation status are provided for all the mentioned taxa.  相似文献   

14.
广西兰科植物二新记录属   总被引:1,自引:0,他引:1  
覃营  邹春玉  蒙涛 《广西植物》2018,38(11):1475-1479
该文报道了广西兰科(Orchidaceae) 2个新记录属,即鹿角兰属(Pomatocalpa Breda)和独花兰属(Changnienia S. S. Chien)。鹿角兰属植物共有13种,中国分布有2种,广西首次记录到该属的台湾鹿角兰[Pomatocalpa undulatum (Lindley) J. J. Smith subsp. acuminatum (Rolfe) S. WatthanaS. W. Chung];独花兰属为单种属,仅独花兰(Changnienia amoena S. S. Chien) 1种,该种为中国特有种,广西首次记录。该文还提供了新记录属和种的形态描述和图片。  相似文献   

15.
Two new species of Lonchocarpus from Brazil, assigned to sect. Laxiflori Benth., are described and illustrated and their affinities, geographical distribution and conservation status are discussed. Lonchocarpus laticiferus from arboreal caatinga vegetation of Bahia State, and deciduous forest of Minas Gerais State is related to L. montanus A. M. G. Azevedo ex M. J. Silva & A. M. G. Azevedo. Lonchocarpus graciliflorus, known only from the rain forest of Paraná, is morphologically similar to L. longiunguiculatus M. J. Silva & A. M. G. Azevedo.  相似文献   

16.
17.
Several taxa erroneously regarded as conspecific with Syrrhopodon trachyphyllus Mont. are reinstated. These include Syrrhopodon cavifolius Sande Lac., S. planifolius P. de la Varde, S. semperi Müll. Hal., S. tosaensis Cardot and Calymperopsis katemensis Zanten (=Syrrhopodon katemensis (Zanten) L.T. Ellis, comb. nov.). Syrrhopodon ludovicae Broth. & Paris is recognized as a synonym of S. mammillosus Müll. Hal., Syrrhopodon orientalis W. D. Reese & P. J. Lin as conspecific with S. cavifolius Sande Lac., Syrrhopodon cambodiensis Tixier as synonymous with S. semperi, S. calymperoides Cardot & P. de la Varde as conspecific with Syrrhopodon prolifer Schwägr., and S. prolifer var. mossmanensis W. D. Reese is placed in synonymy with S. katemensis (Zanten) L.T. Ellis. Varieties of Syrrhopodon prolifer Schwägr. occurring in the palaeotropics are discussed.  相似文献   

18.
该文报道了内蒙古被子植物菊科(Compositae)和禾本科(Gramineae)的2个新分布记录属,即石胡荽属(Centipeda Loureiro)和扇穗茅属(Littledalea Hemsley);十字花科(Cruciferae)、蔷薇科(Rosaceae)、豆科(Leguminosae)、堇菜科(Violaceae)、伞形科(Umbelliferae)、紫草科(Boraginaceae)、菊科(Compositae)、禾本科(Gramineae)、莎草科(Cyperaceae) 9个科的11个新分布记录种,即裂叶独行菜(Lepidium lacerum C. A.Meyer)、腺粒委陵菜(Potentilla granulosa T. T. YuC. L. Li)、祁连山棘豆(Oxytropis qilianshanica C. W.ChangC. L. Zhang ex X. Y.H. Ohashi)、石生堇菜(Viola rupestris F. W. Schmidt)、河西阿魏(Ferula hexiensis K. M. Shen)、青海齿缘草(Eritrichium medicarpum Y. S. LianJ. Q. Wang)、斑种草(Bothriospermum chinense Bunge)、青藏蒿(Artemisia duthreuil-de-rhinsi Krascheninnikov)、石胡荽[Centipeda minima (Linnaeus)A. BraunAscherson]、寡穗茅(Littledalea przevalskyi Tzvelev)、旋鳞莎草[Cyperus michelianus (Linnaeus)Link]。相关凭证标本存放于内蒙古大学植物标本馆(HIMC)中。  相似文献   

19.
Two new species, five new varieties and five new forms belonging to the desmid genera Closterium Nitzsch, Pleurotaenium Naeg., Euastridium W. & W., Micrasterias Agardh, Cosmarium Corda and Staurastrum Meyen from the Andaman Islands are described.  相似文献   

20.
Williams, A. J., Steele, W. K., Cooper, J. & Crawford, R. J. M. 1990. Distribution, population size and conservation of Hartlaub's Gull Lorus hurtlaubii. Ostrich 61: 66–76.

Hartlaub's Gull Larus hartlaubii is endemic to southern Africa, where it breeds between Swakopmund, Namibia and Dyer Island, southwestern Cape Province, South Africa. The species has been re breeding at 48 localities within this range. Between 1984 and 1989 an estimated 12000 pain brered at 31 localities. Twenty-eet percent of the population breeds at Robben Island off the Cape Peninsula, sQuth Africa. Hartlaub's Gull frequently has low breeding success and is considered endangered in Narmbia, where 12% of the poulation occurs. However, the population is increaslng around the urbanmd Cape Peninsula where HartLub's Gull has the potential to become a pest species.  相似文献   

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