Zigadenus venenosus var. gramineus (Rydberg) O.S. Walsh ex M. Peck
Zigadenus venenosus var. gramineus (Rydberg) O.S. Walsh ex M. Peck 
SAR. Vol. I, no. 7
SAR. Vol. I, no. 7 
Alberta Gazette 1967, part 1
Alberta Gazette 1967, part 1 
Alberta Gazette 1974, part 1
Alberta Gazette 1974, part 1 

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