Three new combinations are made here: Haplopteris alternans (Copel.) S.Linds. & C.W.Chen, Haplopteris humblotii (Hieron.) S.Linds. & C.W.Chen, and Haplopteris dareicarpa (Hook.) S.Linds. & C.W.Chen. Lectotypes for Vittaria alternans Copel. and Vittaria humblotii Hieron. are also designated here.
Wallich published Monolophus Wall. (Zingiberaceae) in 1832 for two taxa he had described previously in 1820 as Kaempferia linearis Wall. and K. secunda Wall. He also mentioned M. elegans Wall., but the ? indicates that he was not certain that this species belonged to this new genus. Consequently, Monolophus elegans, while validly published, cannot be the lectotype of the generic name. In 1964 Larsen argued against accepting Monolophus and established the alternative Caulokaempferia K.Larsen. Caulokaempferia, typified by the name C. linearis (Wall.) K.Larsen, is, however, superfluous. Monolophus is hereby reinstated with 22 new combinations. Its phylogenetic position is shown in relation to other genera. Based on comparative nuclear and chloroplast DNA sequence data analyses, Jirawongsea Picheans. (previously Caulokaempferia, pro parte) is reduced to Boesenbergia Kuntze with five new combinations.
A new species of Zingiber singapurense Skornick., is described and illustrated here. It is compared to other species from the Zingiber gracile (Zingiber sect. Zingiber) alliance. A key to this group o
There are currently 15 species of Geostachys in Peninsular Malaysia of which 13 are hyper endemic to their localities. Four taxa are categorised as Endangered, eight as Vulnerable and one each as Near Threatened, Least Concern and Data Deficient. Maps showing the Extent of Occurrence and Area of Occupancy for each species are included. Key issues and recommendations on conservation measures, particularly with respect to ecotourism, are discussed.
Piptospatha colata P.C.Boyce & S.Y.Wong and P. deceptrix P.C.Boyce & S.Y.Wong are newly described, respectively from Kalimantan Barat and Kalimantan Utara, Indonesian Borneo. Recognition of these novelties takes to 13 the number of described, accepted species of Piptospatha. An updated key to the genus is provided and both species are illustrated, along with those species that are most similar.
Zingiber kangleipakense Kishor & Škorničk. (Zingiberaceae) from Manipur, India is newly described and illustrated. A comparison with the most closely related species, Z. longiligulatum and Z. roseum is provided.
