References

For Yucca

Clary, K.H. 1997. Phylogeny, character evolution, and biogeography of Yucca L. (Agavaceae) as inferred from plant morphology and sequences of the Internal Transcribed Spacer (ITS) region of the nuclear ribosomal DNA. The University of Texas at Austin, PhD dissertation. Google Scholar

Clary, K.H., and T.P. Adams. 2021. Yucca carrii (Asparagaceae), a new species from the northern Gulf Coast prairie of Texas. Lundellia 24: 11-23. Google Scholar

Hess, W.J., and R.L. Robbins. 2002. Yucca. 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. Google Scholar

Keith, E.L. 2003. Yucca cernua (Agavaceae), a new species of Yucca from the series Rupicolae in Newton and Jasper counties in eastern Texas. Sida 21: 891-898. Google Scholar

McKelvey, S. D. 1947. Yuccas of the southwestern United States, Part II. The Arnold Arboretum of Harvard University, Jamaica Plain, MA. Google Scholar

Trelease, W. 1902. The Yucceae. Rep. (Annual) Missouri Bot. Gard. 13: 27-133. Google Scholar

Verhoek, S. 1998. Agavaceae. Pp 60-70. In Kubitzki, K., ed. 1998a. The families and genera of vascular plants. III. Flowering plants – Monocotyledons – Lilianae (except Orchidaceae). Springer, Berlin. 478 pp. Google Scholar

Ward, D.B. 2004c. New combinations in the Florida flora II. Novon 14: 365-371. Google Scholar

Ward, D.B. 2006a. A nomenclatural history of southeastern filiferous Yucca, with selection of a neotype for Y. flaccida. Castanea 71: 80-84. Google Scholar

Ward, D.B. 2011d. Yucca filamentosa and Yucca flaccida (Agavaceae) are distinct taxa in their type localities. Castanea 76(2): 222-228. Google Scholar