DOI: 10.3724/SP.J.1142.2011.10042

Plant Science Journal (植物科学学报) 2011/29:1 PP.42-49

Phytogeographic Distribution of Carex Sect. Racemosae (Cyperaceae)

According to the history of geological events, morphological, cytological, and phytogeographical characteristics of Carex Sect.Racemosae, the origin, evolution and dispersal of this section are discussed.Carex Sect.Racemosae is thought to originate in the Eocene from South-western China where the Himalaya-Hengduan Mountains are currently located.Probable dispersal route could be postulated to start from the center northward to Central Asia, Siberia, Europa, with arrival in North America via the Greenland islands and Bering Land Bridge.After the Quaternary ice age, some flourishing species in North America may have moved back to Asia via the Bering Land Bridge, finally forming the present distribution pattern.

Key words:CarexRacemosae,Carex L.,Geographical distribution,Origin,Dispersal

ReleaseDate:2014-07-21 15:41:51

[1] Reznicek A A.Evolution in sedges (Carex,Cyperaceae)[J].Can J Bot,1990,68: 1409-1432.

[2] Liang S Y,Zhang S R.Two new species of Carex Sect.Racemosae (Cyperaceae) from China[J].Novon,2006,16(3): 364-367.

[3] 戴伦凯,梁松筠.中国植物志:第12卷[M].北京:科学出版社,2000: 99-119.

[4] Smith D L,Faulkner J S.The inflorescence of Carex and related genera[J].Bot Rev,1976,42: 52-81.

[5] Saarela J M,Ford B A.Taxonomy of the Carex backii Complex (Section Phyllostachyae,Cyperaceae)[J].Systematic Botany,2001,26(4): 704-721.

[6] Escudero M,Valcárcel V,Vargas P,Luceńo M.Evolution in Carex L.Sect.Spirostachyae (Cyperaceae):A molecular and cytogenetic approach[J].Organisms Diversity & Evolution,2008,7(4): 271-291.

[7] Ball P W.Some aspects of the phytogeography of Carex[J].Can J Bot,1990,68: 1462-1472.

[8] 张树仁,梁松筠,戴伦凯.蒿草属地理分布的研究[J].植物分类学报,1995,33(2): 144-160.

[9] 吴征镒,路安民,汤彦承,陈之端,李德铢.中国被子植物科属综述[M].北京:科学出版社,2003.

[10] 郭正刚,王根绪,沈禹颖,程国栋.青藏高原北部多年冻土区草地植物多样性[J].生态学报,2004,24(1): 149-155.

[11] 塔赫他间.世界植物区系区划[M].北京:科学出版社,1988.

[12] Hipp A L,Rothrock P E,Roalson E H.The evolution of chromosome arrangements in Carex (Cyperaceae)[J].Bot Rev,2009,75: 96-109.

[13] Tiffney B H.Perspectives on the origin of the floristic similarity between eastern Asia and eastern America[J].J Arnold Abor Harv,1985,66: 73-94.

[14] Zhang Q,Chiang T Y,George M,Liu J Q,Abbott R J.Phylogeography of the Qinghai-Tibetan Plateau endemic Juniperus przewalskii (Cupressaceae) inferred from chloroplast DNA sequence variation[J].Molecular Ecology,2005,14: 3513-3524.

[15] Wen J.Evolution of eastern Asian-eastern North American biogeographic disjunctions:A few additional issues[J].Int J Plant Sci,2001,162(6): S117-S122.

[16] Xiang Q Y,Soltis D E,Soltis P S,Manchester S R,Crawford D J.Timing the eastern Asian-eastern North American floristic disjunction:Molecular clock corroborates paleontological estimates[J].Molecular Phylogenetics and Evolution,2000,15(3): 462-472.

[17] Cayouette J.IOPB chromosome data 12[J].New slett Int Organ PI Biosyst(Oslo),1997,28:13-14.