References

For Symphyotrichum

Brouillet, L., and J.C. Semple. 1981. A propos du status taxonomique de Solidago ptarmicoides. Can. J. Bot. 59: 17-21.

Brouillet, L., J.C. Semple, G.A. Allen, K.L. Chambers, and S.D. Sundberg. 2006. Symphyotrichum. In Flora of North America Editorial Committee. 2006b. Flora of North America north of Mexico. Volume 20, Magnoliophyta: Asteridae, part 6: Asteraceae, part 2. Oxford Univ. Press, New York, NY. 666 pp.

Campbell, J.J.N., and W.R. Seymour, Jr. 2014. Another review of the Symphyotrichum patens complex (Asteraceae), including a new variety of S. patens from the southern Blacklands, new records of S. georgianum, and notes on georgianum-like plants outside its known range. Phytoneuron 2014-107: 1-33.

Cronquist, A. 1980. Asteraceae, Volume I, Vascular flora of the Southeastern United States. University of North Carolina Press, Chapel Hill, N.C.

Dahal, S., C.M. Siniscalchi, and R.A. Folk. 2023. Species delimitation in the Symphyotrichum subulatum group (Asteraceae) reveals a new species in central Mexico. Syst. Bot. 48(4): 595-607.

Haines, A.A. 2010. New combinations in the New England tracheophyte flora. Stantec Botanical Notes 13: 1-8. [and 1 page addendum]

Holmes, W.C. and J.R. Singhurst. 2021. Occurrence of Symphyotrichum cordifolium (Asteraceae) in Texas. Phytoneuron 2021-6: 1-6. Published 26 February 2021. ISSN 2153 733X

Jones, A.G. 1980a. A classification of the New World species of Aster (Asteraceae). Brittonia 32: 230-239.

Jones, A.G. 1980b. Data on chromosome numbers in Aster (Asteraceae), with comments on the status and relationships of certain North American species. Brittonia 32: 240-261.

Jones, A.G. 1984. Nomenclatural notes on Aster (Asteraceae) – II. New combinations and some transfers. Phytologia 55: 373-388.

Jones, A.G., and D.A. Young. 1983. Generic concepts of Aster (Asteraceae): a comparison of cladistic, phenetic, and cytological approaches. Syst. Bot. 8: 71-84.

Jones, R.L. 1983. A systematic study of Aster section Patentes (Asteraceae). Sida 10: 41-81.

Jones, R.L. 1992. Additional studies of Aster georgianus, A. patens, and A. phlogifolius (Asteraceae). Sida 15: 305-315.

Jones, R.L., C.T. Witsell, and G.L. Nesom. 2008. Distribution and taxonomy of Symphyotrichum sericeum and S. pratense (Asteraceae: Astereae). J. Bot. Res. Inst. Texas 2: 731-739.

Kauffman, G.E., G.L. Nesom, A.S. Weakley, T.E. Govus, and L.M. Cotterman. 2004. A new species of Symphyotrichum (Asteraceae: Astereae) from a serpentine barren in western North Carolina. Sida 21: 827-839.

Kral, R. 1983a. A report on some rare, threatened, or endangered forest-related vascular plants of the South. Vol. I and II. USDA Forest Service Tech. Publ. R8-TP2. Atlanta, GA.

Lamboy, W.F. 1987. Aster section Biotia (Asteraceae) in New England and the status of Aster glomeratus. Rhodora 89: 299-318.

Lamboy, W.F. 1992. The taxonomic status and probable origin of Aster chlorolepis, a Southern Appalachian endemic. Castanea 57: 52-65.

Medley, M.E. 2021a. Aster priceae and A. kentuckiensis (Asteraceae): Nomenclatural history and a new binomial for Price’s aster. Phytoneuron 2021-18: 1-3. Published 20 April 2021. ISSN 2153 733X

Nesom, G.L. 1994a. Subtribal classification of the Astereae (Asteraceae). Phytologia 76: 193-274.

Nesom, G.L. 1994b. Review of the taxonomy of Aster sensu lato (Asteraceae: Astereae), emphasizing the New World species. Phytologia 77: 141-297.

Nesom, G.L. 1997a. Taxonomic adjustments in North American Aster sensu latissimo (Asteraceae: Astereae). Phytologia 82: 281-288.

Nesom, G.L. 1997b. The status of Aster scabricaulis (Asteraceae: Astereae), an endemic of the Gulf coastal plain. Phytologia 82: 300-315.

Nesom, G.L. 2005b. Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae). Sida 21: 2125-2140.

Nesom, G.L. 2006oo. Taxonomic review of Symphyotrichum patens (Asteraceae: Astereae). Sida 22: 1075-1080.

Nesom, G.L. 2007. Notes on the disarticulation of Xylothamia (Asteraceae: Astereae). J. Bot. Res. Inst. Texas 1: 145-148.

Noyes, R.D., and L.H. Rieseberg. 1999. ITS sequence data support a single origin for North American Astereae (Asteraceae) and reflect deep geographic divisions in Aster s.l. Amer. J. Bot. 86: 398-412.

Reveal, J.L., and C.S. Keener. 1981. Virgulus Raf. (1837), an earlier name for Lasallea Greene (1903) (Asteraceae). Taxon 30: 648-651.

Semple, J.C. 2019. Symphyotrichum estesii (Asteraceae: Astereae), a new species of virguloid aster from Tennessee. Phytoneuron 2019-36: 1-10. Published 16 October 2019. ISSN 2153 733X

Semple, J.C., and J.G. Chmielewski. 1987. Revision of the Aster lanceolatus complex, including A. simplex and A. hesperius (Compositae: Astereae): a multivariate morphometric study. Can. J. Bot. 65: 1047-1062.

Semple, J.C., and L. Brouillet. 1980a. A synopsis of North American asters: the subgenera, sections, and subsections of Aster and Lasallea. Amer. J. Bot. 67: 1010-1026.

Semple, J.C., and L. Brouillet. 1980b. Chromosome numbers and satellite morphology in Aster and Lasallea. Amer. J. Bot. 67: 1027-1039.

Semple, J.C., J.G. Chmielewski, and M.A. Lane. 1989. Chromosome number determinations in fam. Compositae, tribe Astereae. III. Additional counts and comments on generic limits and ancestral base numbers. Rhodora 91: 296-314.

Semple, J.C., S.B. Heard, and ChunSheng Xiang. 1996. The asters of Ontario (Compositae: Astereae): Diplactis Raf., Oclemena E.L. Greene, Doellingeria Nees and Aster L. (including Canadanthus Nesom, Symphyotrichum Nees, and Virgulus Raf.). Univ. of Waterloo Biology Series 38.

Sundberg, S.D. 2004. New combinations in North American Symphyotrichum subgenus Astropolium (Asteraceae: Astereae). Sida 21: 903-910.

Ward, D.B. 2012a. New combinations in the Florida flora III. Phytologia 94: 459-485.

Warners, D.P., and D.C. Laughlin. 1999. Evidence for a species-level distinction of two co-occurring asters: Aster puniceus L. and Aster firmus.. Mich. Bot. 28: 19-31.

Xiang, C., and J.C. Semple. 1996. Molecular systematic study of Aster sensu lato and related genera (Asteraceae: Astereae) based on chloroplast DNA restriction site analyses and mainly North American taxa. Pp. 393-423 in D.J.N. Hind and H.J. Beentje (eds.) Compositae: Systematics. Proceedings of the International Compositae Conference, Kew, 1994, vol. 1.