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Zingiber longii Y.H.Tan & H.B.Ding, sp. nov. (Zingiberaceae) from southeast Yunnan, China, is described and illustrated here. It belongs to the Zingiber sect. Dymczewiczia due to the terminal inflorescence on the leafy shoot. It is similar to Z. rufopilosum in its rufous pilose leaf sheaths and ligules but differs from it by emarginate labellum, glabrous margins of the laminae and ostiole (vs. distinctly bifid labellum with an incision about 1/3 of its length, margins of laminae pilose and ciliate ostiole). [ABSTRACT FROM AUTHOR]

Zingiber magang and Z. tamii, two new species of Zingiber sect. Cryptanthium (Zingiberaceae) from central Vietnam are described and illustrated. Information on their distribution, ecology, phenology, uses and vernacular names are provided. A preliminary IUCN conservation assessment of each of these species is proposed. A key to species of Zingiber sect. Cryptanthium in Vietnam is also given. [ABSTRACT FROM AUTHOR]

Two new species of Zingiber viz. Z. cornigrum and Z. campanulatum from Arunachal Pradesh, North-East India are described. In addition to morphology, data from anatomy, pollen morphology and molecular biology are also used. A key to the Zingiber Sect. Cryptanthium from Northeastern India is provided. [ABSTRACT FROM AUTHOR]

Species delimitation may be difficult for recently divergent species, particularly those with few distinguishable morphological characteristics. Zingiber kawagoii and Z. shuanglongensis are two recently divergent species endemic to Taiwan whose extremely similar vegetative characteristics hinder their distinction during non-flowering seasons. Given their recent divergence, the speciation process and introgressions between these two gingers warrant exploration. However, such studies are hampered by the absence of appropriate molecular markers. To solve this dilemma, we developed 20 transferable expressed sequence tag-simple sequence repeat loci (EST-SSR). Seven highly differentiated loci were further identified for rapid species delimitation. A preliminary test using discriminant analysis of principal components (DAPC) validated the effective discrimination of these EST-SSR loci, while Bayesian clustering analysis (BCA) revealed obvious introgression events between species, particularly on positive-outlier loci. These results imply adaptive introgressions between these species. However, more sampling and further experiments are necessary to validate this inference and resolve questions regarding the introgression and speciation mechanisms. The development of genetic markers in this study provides appropriate experimental conditions and a basis for further research. [ABSTRACT FROM AUTHOR]

Zingiber alba is a new species from West Sumatra. Scaphoclamys perakensis is newly recorded species from the Eastern part of Sumatra. Detailed descriptions and photographs are given for each species. [ABSTRACT FROM AUTHOR]

Four new combinations; Gobba salarkhanii (M.A.Rahman & Yusuf) Govaerts, Riedelia plectophylla (K.Schum.) Govaerts, Zingiber fraseri var. major (Ridl.) Govaerts, Zingiber fraseri var. nervifolium (C.K.Lim & Meekiong) Govaerts and one replacement name; Riedelia brunneopilosa Govaerts, are validated for outstanding nomenclatural issues with some Asian Zingiberaceae. [ABSTRACT FROM AUTHOR]