The Alaska Natural Heritage Program of the University of Alaska Anchorage is pleased to host keys to Salix produced by George Argus, Curator Emeritus, Canadian Museum of Nature, Ottawa, Canada. The IntKey program is an interactive key program that reads data for New World Salix. A pdf key to the genus Salix in Alaska and Yukon is also hosted here. The Salix Key was developed in 1973 by George Argus and updated in 2001. Click the button links below to view or download.
The above IntKey download link includes files which may be used in the interactive identification of New World Salix (willow). The Intkey program is a part of the DELTA (DEscriptive Language for TAxonomy) system invented by Michael Dallwitz in 1980 (Dallwitz, M. J. 1980. User’s Guide to the DELTA System: a general system for encoding descriptions. CSIRO Division of Entomology, Canberra, Australia).
George Argus has used the DELTA System for many years to manipulate Salix data in the preparation of floristic treatments (including descriptions, keys, and geography), interactive identification, and numerical taxonomic studies. In field workshops given in Alaska, Alberta, British Columbia, California, Maine, Ontario, and Oregon, he has taught Salix classification and biology with emphasis on interactive identification.
The included taxa mainly are native New World species, subspecies and varieties, but some are naturalized species and hybrids. Each of these taxa can be scored for 232 characters including morphology and biology, geography, classification, administrative and bibliographical data, synonymy, common names, notes, and references.
Links to Additional Papers on the Salix Genus
Argus, G. 2008. Guide to the identification of Salix (willows) in Alberta.
Argus, G. 2007. Salix L. (Salicaceae) distribution maps and a synopsis of their classification in North America, north of Mexico. Harvard Papers in Botany. 12: 335-368.
Argus, G. 2004. A Guide to the identification of Salix (willows) in Alaska, the Yukon Territory, and adjacent regions. (Updated May 12, 2005).
Aiken, S., M. Dallwitz, L. Consaul, C. McJannet, R. Boles, G. Argus, J. Gillett, P. Scott, R. Elven, M. LeBlanc, L. Gillespie, A. Brystring, H. Solstad, and J. Harris. 2007. Flora of the Canadian Arctic Archipelago: Descriptions, Illustrations, Identification, and Information Retrieval. NRC Research Press, National Research Council of Canada. Ottawa, Canada.
Argus, G. 1999. Classification of Salix in the New World. Version: 5 July 1999. Botanical Electronic News (BEN) # 227.
Contact the Author
The author, George Argus, requests that if you use Salix Intkey you send him a brief message: argus (at) post.harvard.edu