For Hexastylis
Barringer, K.A. 1993. New combinations in North American Asarum (Aristolochiaceae). Novon 3: 225-227.
Blomquist, H.L. 1957. A revision of Hexastylis of North America. Brittonia 8: 255-281.
Diamond, A.R. 2023. New combinations in Asarum (Aristolochiaceae) for two recently described Hexastylis species. J. Bot. Res. Inst. Texas 17(2): 427-429.
Gaddy, L.L. 1986. A new heartleaf (Hexastylis) from Transylvania County, North Carolina. Brittonia 38: 82-85.
Gaddy, L.L. 1987a. A review of the taxonomy and biogeography of Hexastylis (Aristolochiaceae). Castanea 52: 186-196.
Gaddy, L.L. 1987b. Hexastylis shuttleworthii var. harperi (Aristolochiaceae), a new variety of heartleaf from Alabama and Georgia. Sida 12: 51-56.
Gaddy, L.L. 2011. A new species of Hexastylis (Aristolochiaceae) from the sandhills of North and South Carolina. Phytoneuron 2011-47: 1-5.
Gaddy. 1989. In Wofford, B.E. 1989. Guide to the vascular plants of the Blue Ridge. Univ. of Georgia Press, Athens, GA.
Gleason, H.A., and A. Cronquist. 1991. Manual of vascular plants of northeastern United States and adjacent Canada, second edition. New York Botanical Garden, Bronx, NY.
Huber. 1993. In Kubitzki, K., J.G. Rohwer, and V. Bittrich, eds. 1993. The families and genera of vascular plants. II. Flowering plants – Dicotyledons – Magnoliid, Hamamelid and Caryophyllid families. Springer, Berlin. 653 pp.
Keener, B.R. 2020. A new Hexastylis (Aristolochiaceae) from Northeast Alabama (U.S.A.) with notes on the species “groups” within the genus. J. Bot. Res. Inst. Texas 14: 161-166.
Keener, B.R., and G. Todia. 2021. A new Hexastylis (Aristolochiaceae) with uncertain origin in the southeastaern U.S.A., discovered through social media. J. Bot. Res. Inst. Texas 15: 319--325.
Keener, B.R., and L.J. Davenport. 2015. Change in taxonomic rank for a Hexastylis (Aristolochiaceae) taxon of the southeastern United States. J. Bot. Res. Inst. Texas 9: 317-318.
Kelly, L.M. 1997. A cladistic analysis of Asarum (Aristolochiaceae) and implications for the evolution of herkogamy. Amer. J. Bot. 84: 1752-1765.
Kelly, L.M. 1998. Phylogenetic relationships in Asarum (Aristolochiaceae) based on morphology and ITS sequences. Amer. J. Bot. 85: 1454-1467.
Schaner, J. 2021. Second population of Hexastylis rosei (Aristolochiaceae) discovered in North Carolina. Phytoneuron 2021-4: 1–5. Published 26 February 2021. ISSN 2153 733X
Sinn, B.T. 2015. Asarum chueyi (Aristolochiaceae), a new species from the foothills of the Blue Ridge Mountains of Tennessee and Virginia, USA. Phytotaxa 224(1): 85-95.
Sinn, B.T. 2017a. Asarum rosei (Aristolochiaceae), a new species from the Blue Ridge Escarpment of North Carolina, USA. Phytotaxa 296 (1): 53–62. https://doi.org/10.11646/phytotaxa.296.1.3
Sinn, B.T. 2017b. Validation of Asarum rosei B.T.Sinn. Phytotaxa 319 (3): 298. https://doi.org/10.11646/phytotaxa.319.3.10
Sinn, B.T., L.M. Kelly, and J.V. Freudenstein. 2015a. Putative floral brood-site mimicry, loss of autonomous selfing, and reduced vegetative growth are significantly correlated with increased diversification in Asarum (Aristolochiaceae). Molec. Phylogen. Evol. 89: 194-204.
Sinn, B.T., L.M. Kelly, and J.V. Freudenstein. 2015b. Phylogenetic relationships in Asarum: effect of data partitioning and a revised classification. Am. J. Bot. 102: 765-779.
Sugawara, T. 1987. Cytotaxonomic study of Asarum senso lato. Proc. Sino-Jpn. Symposium Pl. Chromos. {}: 147-150.
Weakley, A.S., and D.B. Poindexter. 2020a. Continued recognition of Hexastylis, with two species transferred to Hexastylis from Asarum. In Weakley, A.S., D.B. Poindexter, H.C. Medford, B.A. Sorrie, C.A. McCormick, E.L. Bridges, S.L. Orzell, K.A. Bradley, H.E. Ballard, Jr., R.N. Burwell, S.L. Lockhart, and A.R. Franck. 2020. Studies in the vascular flora of the southeastern United States. VI. J. Bot. Res. Inst. Texas 14: 199-240.
Whittemore, A.T., and L.L. Gaddy. 1997. Hexastylis. In Flora of North America Editorial Committee. 1997. Flora of North America north of Mexico. Volume 3, Magnoliophyta: Magnoliidae and Hamamelidae. Oxford Univ. Press, New York, NY. 590 pp.
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