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DELTA sample data

M. J. Dallwitz and L. Watson

Contents

These keys and descriptions were generated from a DELTA database (Dallwitz 1980; Dallwitz, Paine, and Zurcher 1993).

Introduction

Conventional key • Interactive key, including interactive information retrieval • Hints on using the interactive key

The interactive key allows free choice of characters, is easy to use, and can lead to correct identifications in spite of occasional errors. It can display all the illustrations, full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa.

Character list • Implicit attributes

DELTA data files – see also Guidelines for using data taken from Web publications

Acknowledgements • References • Citation • Contacts, conditions of use, contributions

Descriptions

We advise against extracting comparative information from the descriptions. This is much more easily achieved using the DELTA data files or the interactive key. See also Guidelines for using data taken from Web publications.

The bold parts in the full descriptions are diagnostic descriptions, generated with the aid of Intkey (Dallwitz, Paine, and Zurcher 1995, 2000). They distinguish each taxon in at least two respects from every other taxon.

A B C E F O P Z

A
• Agrostis L. • Andropogon L. • Anisopogon R.Br.

B
• Bambusa Schreber

C
• Chloris O. Swartz • Cynodon Rich.

E
• Echinochloa P. Beauv. • Eleusine Gaertn.

F
• Festuca L.

O
• Oryza L.

P
• Panicum L. • Phragmites Adans. • Poa L.

Z
• Zea L.


Cite this publication as: ‘Dallwitz, M.J., and Watson, L. 1998 onwards. DELTA sample data: descriptions, illustrations, identification, and information retrieval. Version: 19th October 2016. delta-intkey.com’.

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