Dioscoreales

Common Schmerwurz ( Dioscorea communis)

The Yamswurzelartigen ( Dioscoreales ) are an order of monocots. Relatively few species are used by humans.

Description

Yamswurzelartige are mostly perennial, herbaceous plants. Often, rhizomes or tubers are rarely formed as outlasting. The vascular bundles are arranged in one or more circles, this is rare in monocots. Often the leaves are divided into petiole and leaf blade, this being at the monocots ( Liliopsida ) is rarely the case. Often the Blattnervatur is like a net.

On the inflorescences or flowers glandular hairs are present. The flowers are hermaphrodite or unisexual threefold ( Dioscorea ). There are two circles, each with three identically designed bloom cladding available ( perianth ). The bloom are still well preserved on the fruits. The most short style ends in three well-trained stigma lobes. The embryo is usually short. The flowers formula is:

System

The order of Yamswurzelartigen ( Dioscoreales ) contains three families:

• Burmanniaceae (including Thismiaceae )
• Yamswurzelgewächse ( Dioscoreaceae including Taccaceae )
• Nartheciaceae

Within the order of the Dioscoreales Nartheciaceae are at the base, the Burmanniaceae and Dioscoreaceae each sister groups and form a common clade.

Swell

• Description of the order of Dioscoreales in APWebsite. ( Section systematics and description)
• Andreas Bresinsky, Christian Körner, Joachim W. Kadereit, Gunther Neuhaus, Uwe Sonnewald. Strasburger - Textbook of Botany, founded by Eduard Strasburger, Spektrum Akademischer Verlag, Heidelberg 2008, 36th edition ISBN 978-3827414557: Dioscoreales: S. 856. ( section systematics and description)
• Mark W. Chase, Michael F. Fay, Dion S. Devey, Oliver Maurin, Nina Rønsted, T. Jonathan Davies, Yohan Pillon, Gitte Petersen, Ole Seberg, MN Tamura, Conny B. Asmussen, Khidir Hilu, Thomas Borsch, Jerrold I. Davis, Dennis W. Stevenson, J. Chris Pires, Thomas J. Givnish, Kenneth J. Sytsma, Marc A. McPherson, Sean W. Graham & Hardeep S. Rai: MultiGene Analyses of monocot relationships: . a summary, in Aliso, Volume 22, 2006, pp. 63-75. ( Section systematics)
• Thomas J. Givnish, J. Chris Pires, SW Graham, MA McPherson, LM Prince, TB Patterson, HS Rai, EH Roalson, TM Evans, WJ Hahn, KC Millam, AW Meerow, M. Molvray, PJ Kores, HE O ' Brien, JC Hall, WJ Kress & KJ Sytsma. Phylogeny of the monocots based on the highly informative plastid gene ndhF: Evidence for wide spread concerted convergence, Aliso, 22, 2006, pp. 28-51. ( Section systematics)
• P. Schols, CA Furness, Vincent Merckx, P. Wilkin & E. Smets: Comparative pollen development in Dioscoreales, in boarding school. J. Plant Sci., 166, 2005, pp. 909-924.
• Lizabeth R. Caddick et al. Yams and Their allies: Systematics of Dioscoreales, in:. KL Wilson & DA Morrison (Editor): Monocots: Systematics and Evolution, Melbourne, 2000, pp. 475-487. .
• Lizabeth R. Caddick, Paul Wilkin, Paula J. Rudall, Terry AJ Hedderson & Mark W. Chase: Yams Reclassified: a recircumscription of Dioscoreaceae and Dioscoreales in Taxon, 51 (1 ), 2002, pp. 103-114. .