Taxonomy of Dichanthelium hirstii (Poaceae), a very rare and disjunct witch-grass of the eastern U.S.
After a careful range-wide study of specimens and a review of the taxonomic literature, we have determined that Dichanthelium hirstii (Swallen) Kartesz is taxonomically valid at the rank of species, and is a distinctive member of this complex genus. It is also one of the rarest plants in eastern North America.
Gleason, H.A. and A. Cronquist. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. The New York Botanical Garden, Bronx, New York, U.S.A.
Hitchcock, A.S. & A. Chase. 1910. The North American species of Panicum. Contr. U.S. Natl. Herb. 15:1–396.
Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First Edition. In: Kartesz, J.T. and C.A. Meacham. Synthesis of the North American flora, version 1.0. North Carolina Botanical Garden, Chapel Hill, North Carolina, U.S.A.
Kral, R. 1983. A report on some rare, threatened, or endangered forest-related vascular plants of the South – Volume I: Isoetaceae through Euphorbiaceae. U.S.D.A. Forest Service, Southern Region, Atlanta, Georgia, U.S.A.
LeBlond, R.J. 2017. Dichanthelium. In: A.S. Weakley, Flora of the Southern and Mid-Atlantic States. http://www.herbarium.unc.edu/flora.htm
Schuyler, A.E. 1996. Taxonomic status of Panicum hirstii Swallen. Brittonia 59:95–96.
Silveus, W.A. 1942. Grasses: Classification and description of species of Paspalum and Panicum in the United States. Published by the author, San Antonio, Texas, U.S.A.
Swallen, J.R. 1961. A new species of Panicum from New Jersey. Rhodora 63:235–236.
Weakley, A.S. 2015. Flora of the Southern and Mid-Atlantic States. University of North Carolina Herbarium, Chapel Hill, North Carolina. Website edition 1990–2017 (continuously updated) http://www.herbarium.unc.edu/flora.htm
Weakley, A.S., D.B. Poindexter, R.J. LeBlond, B.A. Sorrie, C.H. Karlsson, P.J. Williams, E.L. Bridges, S.L. Orzell, B.R. Keener, A. Weeks, R.D. Noyes, M. Flores-Cruz, J.T. Diggs, G.D. Gann, & A.J. Floden. 2017. New combinations, rank changes, and nomenclatural and taxonomic comments in the vascular flora of the southeastern United States. II. J. Bot. Res. Inst. Texas 11(2):291–325.
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