A re-assessment of members of the family Saxifragaceae in the Canadian Arctic Archipelago is presented as a traditional key and annotated checklist that recognizes 17 taxa. The information on which this paper is based is recorded in a developing DELTA database that aims to collect the following data: place of valid publication; synonymy, usually limited to names that have been associated with the Canadian Arctic; common name(s), if applicable; vegetative and floral morphological characters; data on the distribution, including information about the northernmost record of the taxon; habitat preferences of each species; notes on the species as an environmental indicator; indigenous knowledge; and expanded notes conveying additional information. The database also contains maps, illustrations of characters useful for identification, and colour photographs and line drawings of the taxa. Appendices list characters recorded in the database, brief taxonomic notes, and a sample species description. The data are available on the Internet at http://biodiversity.uno.edu/delta/ as natural-language descriptions and as an INTKEY interactive identification and information-retrieval package for Windows.Résumé : Les auteurs présentent une ré-évaluation des membres de la famille des Saxifragaceae de l'archipelle Arctique Canadien, sous forme d'une clé traditionnelle et d'une liste annotée reconnaissant 17 taxons. L'information sur laquelle ce travail est basé est enregistrée dans une banque de données DELTA, en développement, qui vise à réunir les informations suivantes : localisation de publications valides, synonymie habituellement limitée aux noms qui ont été associés avec l'Arctique Canadien, nom(s) commun(s) si approprié, caractères morphologiques végétatifs et floraux, données sur la distribution, incluant de l'information sur la mention la plus nordique pour le taxon, habitats préférés de chaque espèce, notes sur l'espèce comme indicateur environnemental, connaissance par les indigènes, et un ensemble de notes sur des informations additionnelles. La banque de données comporte également des cartes, des illustrations de caractères utiles pour l'identification, des photographies en couleurs ainsi que des dessins de ces taxons. Les appendices présentent les caractères enregistrés dans la banque de données, de courtes notes taxonomiques et un échantillon de description de l'espèce. Les données sont disponibles par Internet à http://biodiversity.uno.edu/delta/ sous forme de descriptions en langage naturel et sous forme d'un fichier transférable INTKEY pour identification interactive et retrait d'informations sur MS-Windows. Mots clés : Arctique, Canada, DELTA, Internet, Saxifragaceae, taxonomie. [Traduit par la Rédaction] Aiken et al. 2036 Porsild (1957Porsild ( , 1964 and incorporated relevant information published since the latter date. The Poaceae was chosen as the first family to be revised, for reasons that were documented. The DELTA format (Description Language for Tax-Can.

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Biodiversity among taxa of Festuca occurring in North America has been investigated from a revised and illustrated database developed using the DELTA software package. The database includes common names; the place of valid publication of the name; the location of type specimens, when known, and whether we have examined them; synonymy; data on morphology, anatomy, and chromosome number(s); habitat and distribution information; subgeneric classification; taxonomic notes; and more than 200 images. The data are available on the Internet via the World Wide Web (WWW) at http://www.keil.ukans.edu/delta/or by anonymous file transfer protocol (ftp) from ftp.keil.ukans.edu, as natural-language descriptions and as an INTKEY interactive identification and information-retrieval package for MS-Windows. INTKEY and other DELTA programs have been used to assess biodiversity and have supported recognition of several species that have often been placed into synonymy (e.g., Festuca calligera and Festuca earlei), a status change for Festuca idahoensis subsp. roemeri comb.nov., placing Festuca brachyphylla subsp. breviculmis into synonymy with F. brachyphylla subsp. coloradensis, and suggested a taxonomy that is presented in an annotated list. Phenetic and cladistic analyses suggest that the traditional generic limits of Festuca and Lolium should be retained and four subgenera recognized within Festuca, subgg. Festuca, Leucopoa, Schedonorus, and Subulatae, with sects. Subulatae and Obtusae. Key words: DELTA, Festuca, Lolium, Poaceae, biodiversity, WWW, taxonomy.

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