Accepted By:
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Abrams, L.R. & R. S. Ferris. 1960. Bignonias to Sunflowers. 4: 732 pp. In L.R. Abrams (ed.) Ill. Fl. Pacific States. Stanford University Press, Stanford.
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Cronquist, A. J. 1994. Asterales. 5: 1–496. In A. J. Cronquist, A. H. Holmgren, N. H. Holmgren, J. L. Reveal & P. K. Holmgren (eds.) Intermount. Fl.. Hafner Pub. Co., New York.
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Hickman, J. C. 1993. The Jepson Manual: Higher Plants of California 1–1400. University of California Press, Berkeley.
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Munz, P. A. 1974. Fl. S. Calif. 1–1086. University of California Press, Berkeley.
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Munz, P. A. & D. D. Keck. 1959. Cal. Fl. 1–1681. University of California Press, Berkeley.
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