TY - JOUR T1 - Biodiversity among Festuca (Poaceae) in North America: diagnostic evidence from DELTA and clustering programs, and an INTKEY package for interactive, illustrated identification and information retrieval JF - Canadian Journal of Botany Y1 - 1997 A1 - Aiken, S. G. A1 - McJannet, C. L. A1 - Consaul, L. L. A1 - Dallwitz, M. J. SP - 1527 EP - 1555 VL - 75 ER -