Douglas, G., Straley, G.B., Meidinger, D.V. 1998, Rare native vascular plants of British Columbia. B.C. Min. Environ. Lands and Parks, Victoria, B.C. 423p.
Douglas, G., Straley, G.B., Meidinger, D.V. 1998, Rare native vascular plants of British Columbia. B.C. Min. Environ. Lands and Parks, Victoria, B.C. 423p.