Townsendia smithii, from northwestern Arizona, is described, illustrated and contrasted with other Arizona species in a key.
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Beaman, J. H. 1957. The systematics and evolution ofTownsendia (Compositae). Contr. Gray Herb. 183: 1–151.
Welsh, S. L. & J. L. Reveal. 1968. A new species ofTownsendia (Compositae) from Utah. Brittonia 20: 375–377.
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Shultz, L.M., Holmgren, A.H. A new species of Townsendia (Asteraceae) from northern Arizona. Brittonia 32, 144–147 (1980). https://doi.org/10.2307/2806780