Siamanthus, a new genus of Zingiberaceae from Thailand

Larsen, Kai; Mood, John

doi:10.1111/j.1756-1051.1998.tb01516.x

Cited by 12 publications

(7 citation statements)

References 2 publications

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“…The Riedelieae (Tables 2-4) include four genera united by both molecular and morphological characters: Burbidgea (Borneo), Pleuranthodium (primarily New Guinea and Bismarck Archipelago), Riedelia (New Guinea), and Siamanthus (Thailand). The affinities of these four genera are indicated by their common possession of long, slender silique-like capsules that open by longitudinal slits to the base (Smith, 1972(Smith, , 1990bLarsen and Mood, 1998). Larsen and Mood (1998) also pointed out that the close relationship of at least three of these genera (Burbidgea, Riedelia, and Siamanthus) is suggested by unique ''nectary pits'' on the dorsal midrib of the leaf blade.…”

Section: Subfamilies and Tribesmentioning

confidence: 99%

The phylogeny and a new classification of the gingers (Zingiberaceae): evidence from molecular data

Kress

Prince

Williams

2002

American J of Botany

442

413

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The pantropical Zingiberaceae is the largest family in the order Zingiberales with 53 genera and over 1200 species. Classifications of the family first proposed in 1889 and refined by others since that time recognize four tribes (Globbeae, Hedychieae, Alpinieae, and Zingibereae) based on morphological features, such as number of locules and placentation in the ovary, development of staminodia, modifications of the fertile anther, and rhizome-shoot-leaf orientation. New phylogenetic analyses based on DNA sequences of the nuclear internal transcribed spacer (ITS) and plastid matK regions suggest that at least some of these morphological traits are homoplasious and three of the tribes are paraphyletic. The African genus Siphonochilus and Bornean genus Tamijia are basal clades. The former Alpinieae and Hedychieae for the most part are monophyletic taxa with the Globbeae and Zingibereae included within the latter. The results of these phylogenetic investigations are used to propose a new classification of the Zingiberaceae that recognizes four subfamilies and four tribes: Siphonochiloideae (Siphonochileae), Tamijioideae (Tamijieae), Alpinioideae (Alpinieae, Riedelieae), and Zingiberoideae (Zingibereae, Globbeae). Morphological features congruent with this classification and the taxonomic status of various monotypic genera are discussed.

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Section: Subfamilies and Tribesmentioning

confidence: 99%

The phylogeny and a new classification of the gingers (Zingiberaceae): evidence from molecular data

Kress

Prince

Williams

2002

American J of Botany

442

413

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“…There is no doubt, however, that Thailand is the best explored country in the region. Still several new species and three new genera of Zingiberaceae have been described from Thailand during the last few years, Cornukaempferia Mood & Larsen (1 997), Siamanthus Larsen & Mood (1998), and Smithatris Kress & Larsen (2001). It is therefore not unexpected that another new genus of this family have been found in Laos.…”

Section: Introductionmentioning

confidence: 98%

Laosanthus, a new genus of Zingiberaceae from Laos

Larsen

Jenjittikul

2001

Nordic Journal of Botany

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“…The two recognized tribes in Alpinioideae, Riedelieae and Alpinieae, can be easily distinguished from each other, as members of Riedelieae possess long silique‐like capsules that dehisce basally and extrafloral nectaries on the midrib of the adaxial surface of the leaf blade (Kress et al ., ). In contrast, members of Alpinieae often possess globose or ovoid fruits that are not as elongated as those seen in Riedelieae and lack extrafloral nectaries (Smith, , ; Larsen & Mood, ; Kress et al ., ). Although molecular and morphological data strongly support the monophyly of these two tribes, intergeneric relationships in Alpinieae are not well supported and recent studies have shown instances of paraphyly and polyphyly throughout the tribe, most notably in Alpinia Roxb.…”

Section: Introductionmentioning

confidence: 99%

Evolutionary significance of seed structure in Alpinioideae (Zingiberaceae)

et al. 2015

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Alpinioideae is the largest of the four subfamilies of Zingiberaceae and is widely distributed throughout the New and Old World tropics. Recent molecular studies have shown that, although Alpinioideae is a strongly supported monophyletic subfamily with two distinct tribes (Alpinieae and Riedelieae), large genera, such as Alpinia and Amomum, are polyphyletic and are in need of revision. Alpinia and Amomum have been shown to form seven and three distinct clades, respectively, but, for many of these clades, traditional vegetative and floral synapomorphies have not been found. A broad survey of seeds in Alpinioideae using light microscopy and synchrotron-based X-ray tomographic microscopy has shown that many clades have distinctive seed structures that serve as distinctive apomorphies. Tribes Riedelieae and Alpinieae can be distinguished on the basis of operculum structure, with the exception of three taxa analysed. The most significant seed characters were found to be various modifications of the micropylar and chalazal ends, the cell shape of the endotesta and exotesta, and the location of an endotestal gap. A chalazal chamber and hilar rim are reported for the first time in Zingiberaceae. In addition to characterizing clades of extant lineages, these data offer insights into the taxonomic placement of many fossil zingiberalean seeds that are critical to understanding the origin and evolution of Alpinioideae and Zingiberales as a whole.

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Siamanthus, a new genus of Zingiberaceae from Thailand

Cited by 12 publications

References 2 publications

The phylogeny and a new classification of the gingers (Zingiberaceae): evidence from molecular data

The phylogeny and a new classification of the gingers (Zingiberaceae): evidence from molecular data

Laosanthus, a new genus of Zingiberaceae from Laos

Evolutionary significance of seed structure in Alpinioideae (Zingiberaceae)

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