For Zephyranthes
Carr, W.R. 2016. An annotated list of the rare plants of Texas. Published by the author, Austin, TX.
Christenhusz, M.J.M., M.F. Fay, and J.W. Byng, eds. 2018. The global flora: a practical guide to vascular plant species of the world. Special edition, GLOVAP nomenclature Part 1, vol. 4: 1-155.
Flagg, R.O., G.L. Smith, and W.S. Flory. 2002a. Habranthus. In Flora of North America Editorial Committee. 2002a. Flora of North America north of Mexico. Volume 26, Magnoliophyta: Liliidae: Liliales and Orchidales. Oxford Univ. Press, New York, NY. 723 pp.
Flagg, R.O., G.L. Smith, and W.S. Flory. 2002b. Zephyranthes. In Flora of North America Editorial Committee. 2002a. Flora of North America north of Mexico. Volume 26, Magnoliophyta: Liliidae: Liliales and Orchidales. Oxford Univ. Press, New York, NY. 723 pp.
García, N., A.W. Meerow, S. Arroyo-Leuenberger, R.S. Oliveira, J.H. Dutilh, P.S. Soltis, and W.S. Judd. 2019. Generic classification of Amaryllidaceae tribe Hippeastreae. Taxon 68: 481-498.
Hume, H.H. 1938. The genus Cooperia. Bull. Torrey Bot. Club 65: 79-87.
Meerow & Snijman. 1998. In Kubitzki, K., ed. 1998a. The families and genera of vascular plants. III. Flowering plants – Monocotyledons – Lilianae (except Orchidaceae). Springer, Berlin. 478 pp.
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