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      Hedychiumviridibracteatum X.Hu, a new species from Guangxi Autonomous Region, South China

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          Abstract

          Abstract

          Hedychium viridibracteatum X.Hu, a new species from Guangxi Zhuang Autonomous Region, South China, is described and illustrated. Hedychium viridibracteatum X.Hu is included in the short-anther group of Hedychium and is most similar to Hedychium villosum Wall. var. tenuiflorum Voigt ex Baker, H. villosum Wall. var. villosum Wall., and H. chingmeianum N. Odyuo & D. K. Roy.

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          Induced Polyploidy in Diploid Ornamental Ginger (Hedychium muluense R. M. Smith) Using Colchicine and Oryzalin

          The ploidy level of H. muluense , a diploid (2 n = 2 x = 34) and dwarf ornamental ginger species, has been determined and is reported for the first time. Oryzalin and colchicine were successfully used to induce polyploidy in Hedychium muluense in vitro. Embryogenic cell lines were treated with oryzalin (30, 60, or 120 μM) and colchicine (2.5, 5, or 10 m m ) for 24, 48, or 72 h. The control contained no antimitotic agent. Flow cytometry, chloroplast count, and stomatal frequency were more effective and reliable than stomatal length as methods for assessing ploidy. Overall, oryzalin was more effective than colchicine in inducing polyploidy. The highest induction frequency (15%) of tetraploidy was achieved when embryogenic callus was exposed to 60 μM oryzalin for 72 h. For colchicine, exposure of embryogenic callus to the 2.5 m m colchicine for 24 h was the most effective in creating tetraploid (13%) plants.
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            Chromosome Numbers in Zingiberaceae

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              Circumscription and lectotypification of Hedychium villosum and its variety H. villosum var. tenuiflorum (Zingiberaceae)

              Abstract The nomenclatural confusion between the Indian gingers Hedychium villosum Wallich and its variety Hedychium villosum var. tenuiflorum (Wall. ex Voigt) Wall. ex Baker is discussed. Both taxa are lectotypified in order to stabilize the names and contribute towards a resolution of their confusing nomenclatural past. Both taxa are described in detail to aid identification.
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                Author and article information

                Contributors
                Journal
                PhytoKeys
                PhytoKeys
                PhytoKeys
                PhytoKeys
                Pensoft Publishers
                1314-2011
                1314-2003
                2018
                2 November 2018
                : 110
                : 69-79
                Affiliations
                [1 ] Zhongkai University of Agriculture and Engineering, Zhongkai Road 501, Haizhu District, Guangzhou, Guangdong 510225, PR China Zhongkai University of Agriculture and Engineering Guangzhou China
                [2 ] South China Botanical Garden, Chinese Academy of Sciences, Xingke Road, Tianhe District, Guangzhou, Guangdong 510650, PR China South China Botanical Garden, Chinese Academy of Sciences Guangzhou China
                Author notes
                Corresponding author: Xiu Hu ( xiuhu0938@ 123456gmail.com )

                Academic editor: Yasen Mutafchiev

                Article
                10.3897/phytokeys.110.28710
                6226543
                c140ea95-c8bd-4c93-8f90-3676a8dc57ea
                Xiu Hu, Jia-qi Huang, Jia-chuan Tan, Yong-qingWu, Juan Chen

                This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                History
                : 30 July 2018
                : 12 October 2018
                Categories
                Research Article
                Zingiberaceae
                Biodiversity & Conservation
                Species Inventories
                Cenozoic
                World

                Plant science & Botany
                hedychium, zingiberaceae,new species,guangxi autonomous region,plantae,zingiberales,zingiberaceae

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