Myxochlamys (Zingiberaceae), a new genus from Borneo

• TAKANO ATSUKO

  Museum of Nature and Human Activities

• NAGAMASU HIDETOSHI

  The Kyoto University Museum, Kyoto University

Abstract

A new genus and species, Myxochlamys mullerensis (Zingiberaceae) from Central Kalimantan, Borneo is described. This new species is characterized by indistinct pseudostems; congested inflorescences with spirally arranged bracts; copious, highly viscous, axillary-pooled mucus secreted from glands on imbricate bracts; and flowers with a concave labellum, versatile anthers, and a groove formed by the inner surface of the corolla tube to envelope and hold the style. Parallel orientation of the plane of distichy of the leafy shoots, well-developed staminodes, and labellum not connate with the filament suggest that Myxochlamys belongs to the tribe Zingibereae. Among the genera in Zingibereae, Myxochlamys is similar to Scaphochlamys in that it lacks a distinct pseudostem and spiral inflorescence; it is distinct from Scaphochlamys, however, in that it has a groove within the corolla tube, concave labellum and versatile anthers. Phylogenetic analyses based on DNA sequences of the nuclear internal transcribed spacer (ITS) and maturase K (matK) of the chloroplast DNA show similarity with Distichochlamys, Myxochlamys, and Scaphochlamys. The similarities and differences between Myxochlamys and related genera are discussed.

Journal

• Acta phytotaxonomica et geobotanica

  Acta phytotaxonomica et geobotanica 58 (1), 19-32, 2007

  The Japanese Society for Plant Systematics

Keywords

• Borneo
• Myxochlamys
• Myxochlamys mullerensis
• molecular phylogeny
• new genus
• Scaphochlamys
• Zingiberaceae
• Zingibereae

Details

• CRID: 1390282680245667584
• NII Article ID: 110006290531
• NII Book ID: AA11586265
• DOI: 10.18942/apg.kj00004609388
• ISSN: 21897042
• ISSN: 13467565
• Text Lang: en
• Data Source:
  • JaLC
  • CiNii Articles
• Abstract License Flag: Disallowed