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1. Plants with a single basal rosette of leaves..................... D. alaskana
1. Plants with multiple rosettes or clustered cushions of leaves
2. Inflorescence a tight, terminal involucrate umbel of 2-10 stalked flowers...............D. laevigata
2. Inflorescence a terminal umbel of a single stalked flower to sometimes 2 stalked flowers, not involucrate........................D. gormanii
Source: Illustrated Flora of British Columbia
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