Accepted By:
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Abrams, L.R. 1944. Buckwheats to Kramerias. 2: 1–635. In L.R. Abrams (ed.) Ill. Fl. Pacific States. Stanford University Press, Stanford.
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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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Hitchcock, C. L., A. J. Cronquist, F. M. Ownbey & J. W. Thompson. 1961. Saxifragaceae to Ericaceae. Part III: 614pp. In C. L. Hitchcock Vasc. Pl. Pacif. N.W.. University of Washington Press, Seattle.
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Munz, P. A. & D. D. Keck. 1959. Cal. Fl. 1–1681. University of California Press, Berkeley.
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Rogers, L. M. 2019. A Taxonomic and Biogeographic Analysis of the Trifolium gracilentum Species Complex 1-146. Unpublished Masters Thesis, Miami University, Oxford, Ohio.
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Scoggan, H. J. 1978. Dicotyledoneae (Saururaceae to Violaceae). 3: 547–1115. In Fl. Canada. National Museums of Canada, Ottawa.
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Ulloa Ulloa, C., P. Acevedo-Rodríguez, S. G. Beck, M. J. Belgrano, R. Bernal, P. E. Berry, L. Brako, M. Celis, G. Davidse, S. R. Gradstein, O. Hokche, B. León, S. León-Yánez, R. E. Magill, D. A. Neill, M. H. Nee, P. H. Raven, H. Stimmel, M. T. Strong, J. L. Villaseñor Ríos, J. L. Zarucchi, F. O. Zuloaga & P. M. Jørgensen. 2017. An integrated assessment of vascular plants species of the Americas. Science 358: 1614–1617 [online suppl. materials: 1-23 + 1-2497], t. 1-4 [f. S1-5].
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Ulloa Ulloa, C., P. Acevedo-Rodríguez, S. G. Beck, M. J. Belgrano, R. Bernal, P. E. Berry, L. Brako, M. Celis, G. Davidse, S. R. Gradstein, O. Hokche, B. León, S. León-Yánez, R. E. Magill, D. A. Neill, M. H. Nee, P. H. Raven, H. Stimmel, M. T. Strong, J. L. Villaseñor Ríos, J. L. Zarucchi, F. O. Zuloaga & P. M. Jørgensen. 2018 (onwards). An integrated Assessment of Vascular Plants Species of the Americas (Online Updates).
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Zohary, M. & D. Heller. 1984. Gen. Trifolium i–x, 1–606. Israel Academy of Sciences and Humanities, Jerusalem.
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