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For Hypericum

Adams, W.P. 1957. A revision of the genus Ascyrum (Hypericaceae). Rhodora 59: 73-95.

Adams, W.P. 1962. Studies in the Guttiferae. I. A synopsis of Hypericum section Myriandra. Contr. Gray Herbarium Harv. 182: 1-51.

Adams, W.P. 1973. Clusiaceae of the southeastern United States. J. Elisha Mitchell Sci. Soc. 89: 62-71.

Adams, W.P., and N.K.B. Robson. 1961. A re-evaluation of the generic status of Ascyrum and Crookea (Guttiferae). Rhodora 63: 10-16.

Allison, J.R. 2011 Synopsis of the Hypericum denticulatum complex (Hypericaceae). Castanea 76: 99-115.

Calie, P.J., E.E. Schilling, and D.H. Webb. 1983. Flavonoid chemistry of the generic segregates Ascyrum and Crookea of Hypericum. Biochem. Syst. & Ecol. 11: 107-109.

Cooperrider, T.S. 1989. The Clusiaceae (or Guttiferae) of Ohio. Castanea 54: 1-11.

Culwell, D.E. 1970. A taxonomic study of the section Hypericum in the eastern United States. Ph.D. dissertation, University of North Carolina at Chapel Hill.

Godfrey, R.K. 1988. Trees, shrubs, and woody vines of northern Florida and adjacent Georgia and Alabama. University of Georgia Press, Athens.

Meseguer, A.S., J.J. Aldasoro, and I. Sanmartín. 2013. Bayesian inference of phylogeny, morphology and range evolution reveals a complex evolutionary history in St. John’s wort (Hypericum). Molec. Phylogen. Evol. 67: 379-403.

Meseguer, A.S., J.M. Lobo, R. Ree, D.J. Beerling, and I. Sanmartín. 2015. Integrating fssils, phylogenies, and niche models into biogeography to reveal ancient evolutionary history: the case of Hypericum (Hypericaceae). Syst. Biol. 64(2): 215-232.

Nürk, N.M., S. Madriñán, M.A. Carine, M.W. Chase, and F.R. Blattner. 2013. Molecular phylogenetics and morphological evolution of St. John’s wort (Hypericum; Hypericaceae). Molec. Phylogen. & Evol. 66: 1-16.

Robson N.K.B. 2001. Studies in the genus Hypericum L. (Guttiferae). 4(1). Sections 7. Roscyna to 9. Hypericum sensu lato (part 1). Bull. British Museum of Natural History (Botany) 31(2): 37-88.

Robson, N.K.B. 1990. Studies in the genus Hypericum L. (Guttiferae). 8. Sections 29. Brathys (part 2) and 30. Trigynobrathys. Bull. Nat. Hist. Mus. Lond. (Bot.) 20: 1-151.

Robson, N.K.B. 1996. Studies in the genus Hypericum L. (Guttiferae). 6. Sections 20. Myriandra to 28. Elodes. Bull. Nat. Hist. Mus. Lond. (Bot.) 26: 75-217.

Robson, N.K.B. 2002. Studies in the genus Hypericum L.( Guttiferae). 4(2). Section 9. Hypericum sensu lato (part 2): subsection 1. Hypericum series 1. Hypericum. Bull. Nat. Hist. Mus. Lond. (Bot.) 32: 61-123.

Robson, N.K.B. 2006. Studies in the genus Hypericum L.( Clusiaceae). Section 9. Hypericum sensu lato (part 3): subsection 1. Hypericum series 2. Senanensia, subsection 2. Erecta and section 9b. Graveolentia. Systematics and Biodoiversity 4: 19-98.

Robson, N.K.B. 2015a. Hypericum. In Flora of North America Editorial Committee. 2015. Flora of North America north of Mexico. Volume 6, Magnoliophyta: Cucurbitaceae to Droseraceae. Oxford Univ. Press, New York, NY. 468 pp.

Robson, N.K.B., and W.P. Adams. 1968. Chromosome numbers in Hypericum and related genera. Brittonia 20: 95-106.

Robson, N.K.B.. 1985. Studies in the genus Hypericum L. (Guttiferae). 3. Sections 1. Campylosporus to 6a. Umbraculoides. Bull. British Museum of Natural History (Botany) 12: 163–325

Sorrie, B.A. 2012. Identification, distribution, and habitat of needle-leaved Hypericum (Hypericaceae) in the southeastern United States. Phytoneuron 2012-76: 1-14. Published 13 Aug 2012. ISSN 2153 733X

Stevens. 2007. In Kubitzki, K., C. Bayer, and P.F. Stevens, eds. 2007. The families and genera of vascular plants. IX. Flowering plants – Eudicots – Berberidopsidales, Buxales, Crossosomatales, Fabales p.p., Geraniales, Gunnerales, Myrtales p.p., Proteales, Saxifragales, Vitales, Zygophyllales, Clusiaceae alliance, Passifloraceae alliance, Dilleniaceae, Huaceae, Picramniaceae, Sabiaceae. Springer, Berlin. 509 pp.

Weakley, A.S., R.J. LeBlond, B.A. Sorrie, C.T. Witsell, L.D. Estes, K.G. Mathews, A. Ebihara, and K. Gandhi. 2011. New combinations, rank changes, and nomenclatural and taxonomic comments in the vascular flora of the southeastern United States. J. Bot. Res. Inst. Texas 5: 437-455.

Webb, D.H. 1980. A biosystematic study of Hypericum section Spachium in eastern North America. Ph.D. Diss., University of Tennessee, Knoxville.

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