Panicum dichotomiflorum

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Distribution Map: Based on vouchered plant specimens only. View county names by placing the mouse cursor over a particular county.

Species Distribution Map
Family:POACEAE
Species:Panicum dichotomiflorum Michx.
Common Name:Fall Panic Grass; Spreading Witch Grass
Habitat:**
Associated Ecological Communities:**
Growth Habit:Herb
Duration:Annual
Category:Vascular
USDA Symbol:PADI
Plant Notes:**
Taxonomic Notes:**
Status:Native, FACW (NWI)
References:**
Specimen: View specimen details in the Alabama Herbarium Consortium Specimen Database

** Not applicable or data not available.

Classification

FamilyPOACEAE - Grass family
Genus Panicum
Species Panicum dichotomiflorum Michx. - Fall Panic Grass; Spreading Witch Grass

Citation

Citation Panicum dichotomiflorum Michaux, Fl. Bor.-Amer. 1: 48. 1803.
Basionym: **
Type: "Occidentalibus montium Alleghanis", without data, Michaux s.n. (lectotype: P-M). Lectotypified by Hitchcock & Chase, Contr. U.S. Natl. Herb. 15: 48. 1910.

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Leptoloma dichotomiflora Leptoloma dichotomiflora (Michaux) Smyth, Tran. Kansas Acad. Sci. 25: 86. 1913.Panicum dichotomiflorum Michaux 1803. 
Panicum amplectans Panicum amplectans Chapman, Bot. Gaz. 3: 20. 1878. FLORIDA: "South Florida", Blodgett s.n. (holotype: US).
Panicum aquaticum var. chloroticum Panicum aquaticum Poiret, var. chloroticum (Nees von Esenbeck ex Trinius) R. C. Foster, Rhodora 68: 320. 1966.Panicum chloroticum Nees von Esenbeck ex Trinius 1826. 
Panicum brachiatum Panicum brachiatum Bosc ex Sprengel, Syst. Veg. 1: 321. 1824 ("1825"), non Poiret 1816. "Ins. Bermud." [however, Bosc collections are all from the Carolinas], without data, Bosc s.n. (holotype: P?).
Panicum chloroticum Panicum chloroticum Nees von Esenbeck ex Trinius, Gram. Panic. 236. 1826. BRAZIL: Mato Grosso: Cuiaba, Rio Paraguay, 1829, Langsdorff s.n. (holotype: LE).
Panicum chloroticum var. agreste Panicum chloroticum Nees von Esenbeck ex Trinius, var. agreste Nees von Esenbeck ex Trinius, Gram. Panic. 236. 1826, nom. inadmiss.Panicum chloroticum Nees von Esenbeck ex Trinius 1826. 
Panicum chloroticum var. luxurians Panicum chloroticum Nees von Esenbeck ex Trinius, var. luxurians Döll, in Martius, Fl. Bras. 2(2): 198. 1877, nom. illegit.Panicum chloroticum Nees von Esenbeck ex Trinius, var. pingue Nees von Esenbeck 1829. 
Panicum chloroticum var. pingue Panicum chloroticum Nees von Esenbeck ex Trinius, var. pingue Nees von Esenbeck, in Martius, Fl. Bras. Enum. Pl. 2(1): 164. 1829. BRAZIL: Bahia:
Panicum chloroticum var. sylvestre Panicum chloroticum Nees von Esenbeck ex Trinius, var. sylvestre Nees von Esenbeck ex Trinius, Gram. Panic. 236. 1826. BRAZIL: Bahia:
Panicum dichotomiflorum subsp. puritanorum Panicum dichotomiflorum Michaux, subsp. puritanorum (Svenson) Freckmann & Lelong, Sida 20: 171. 2002.Panicum dichotomiflorum Michaux, var. puritanorum Svenson 1920. 
Panicum dichotomiflorum var. imperiorum Panicum dichotomiflorum Michaux, var. imperiorum Fernald, Rhodora 44: 380. 1942.VIRGINIA: Greensville Co.: Fontaine Creek, SW of Haley's Bridge, 14 Oct 1941, Fernald & Long 13877 (holotype: GH; isotype: PH). 
Panicum dichotomiflorum var. puritanorum Panicum dichotomiflorum Michaux, var. puritanorum Svenson, Rhodora 22: 154, f. 1-4. 1920. MASSACHUSETTS: Barnstable Co.: Half-way Pond, Barnstable, 13 Sep 1919, Fernald 306 (holotype: GH; isotype: US).
Panicum francavillanum Panicum francavillanum E. Fournier, Mexic. Pl. 2: 25. 1886. MEXICO: "Tacabaya", without data, Schaffner 301 (holotype: P).
Panicum geniculatum Panicum geniculatum Muhlenberg, Cat. Pl. 9. 1813, nom. illegit. et non Lamarck 1798.Panicum dichotomiflorum Michaux 1803. 
Panicum multiflorum Panicum multiflorum Poiret, in Lamarck, Encycl., Suppl. 4: 282. 1816. SOUTH CAROLINA: Without data, Bosc s.n. (lectotype: P; isotype: P). Lectotypified by Hitchcock & Chase, Contr. U.S. Natl. Herb. 15: 48. 1910.
Panicum proliferum var. chloroticum Panicum proliferum Lamarck, var. chloroticum (Nees von Esenbeck ex Trinius) Hackel, Repert. Spec. Nov. Regni Veg. 6: 343. 1909.Panicum chloroticum Nees von Esenbeck ex Trinius 1826. 
Panicum proliferum var. geniculatum Panicum proliferum Lamarck, var. geniculatum A. W. Wood, Amer. Bot. Fl., ed. 2. 392. 1871.  
Panicum proliferum var. geniculatum Panicum proliferum Lamarck, var. geniculatum Vasey, Grasses U.S. 12. 1883, non A. W. Wood 1871.Panicum geniculatum Muhlenberg 1813, nom. illegit. et non Lamarck 1798; Panicum dichotomiflorum Michaux 1803. 
Panicum proliferum var. pilosum Panicum proliferum Lamarck, var. pilosum Grisebach, Cat. Pl. Cub. 232. 1866. CUBA: Hanabana, 1865, Wright 186 (holotype: GOET).
Panicum proliferum var. richardii Panicum proliferum Lamarck, var. richardii Döll, in Martius, Fl. Bras. 2(2): 200. 1877. BRAZIL: Pará:
Panicum proliferum var. strictum Panicum proliferum Lamarck, var. strictum Grisebach, Cat. Pl. Cub. 232. 1866. CUBA: Without data, Wright 3456 (holotype: GOET).
Panicum retrofractum Panicum retrofractum Delile ex Desvaux, Opusc. Sci. Phys. Nat. 96. 1831. "Caroline", without data (holotype: P).
Panicum dichotomiflorum var. dichotomiflorum    
Panicum dichotomiflorum var. geniculatum Panicum dichotomiflorum Michaux, var. geniculatum (A. W. Wood) Fernald, Rhodora 38: 387. 1936.Panicum proliferum Lamarck, var. geniculatum A. W. Wood 1871. 
Panicum proliferum Panicum proliferum Lamarck, Tabl. Encycl. 4: 747. 1798. VIRGINIA: Cult. in France, without data (holotype: P; isotype: US(fragm)).

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort; choose a county or herbaria to filter the specimen data.

Counties included on distribution map: Autauga, Baldwin, Bibb, Bullock, Butler, Calhoun, Chilton, Choctaw, Cleburne, Colbert, Conecuh, Covington, Dallas, DeKalb, Escambia, Etowah, Fayette, Franklin, Geneva, Greene, Houston, Jackson, Jefferson, Lawrence, Lee, Lowndes, Macon, Madison, Marshall, Mobile, Monroe, Montgomery, Morgan, Pike, Shelby, St. Clair, Talladega, Tuscaloosa, Wilcox, Winston

Counties represented by specimen data listed below:

Herbaria represented by specimen data listed below: ALNHS, AUA, JSU, SAMF, TROY, UNA, UWAL

Range of years during which specimens were collected: 1896 - 2020

Barcode / Accession No. County Coll. Date Collector &
Collection No.		 Herbarium &
Herbarium Name Used		 Image
UNA00005052 Jefferson 21 Jun 1955 Batson, Jackie
s.n.		 UNA
Panicum dichotomiflorum Michx. subsp. dichotomiflorum
UWAL0032847 Lawrence 20 Sep 2014 England, J. Kevin
5200		 UWAL
Panicum dichotomiflorum Michaux var. dichotomiflorum
TROY000028116 Montgomery 15 Oct 2000 Diamond, Alvin R.
12216		 TROY
Panicum dichotomiflorum Michaux
JSU100189 Jefferson 17 Oct 1975 Whetstone, R. David
7172		 JSU
Panicum dichotomiflorum Michaux
UNA00026626 Tuscaloosa 06 Oct 1977 Bodkin, C.
136		 UNA
Panicum dichotomiflorum Michx. subsp. dichotomiflorum
UWAL0015672 Lowndes 27 Sep 2013 Diamond, Alvin R.
24591		 UWAL
Panicum dichotomiflorum Michaux
TROY000049057 Escambia 02 Sep 2019 Diamond, Alvin R.
29069		 TROY
Panicum dichotomiflorum Michaux
JSU100191 Marshall 09 Sep 1991 Spaulding, Daniel D.
847		 JSU
Panicum dichotomiflorum Michaux
JSU105694 Calhoun 21 Sep 1986 Lawler, Carol L.
1245		 JSU
Panicum dichotomiflorum Michaux
UNA00005022 Mobile 10 Sep 1964 Deramus, Rebecca
D247		 UNA
Panicum dichotomiflorum Michx. subsp. dichotomiflorum
UWAL0014671 Bullock 20 Nov 2012 Dykes, Bailee
1469		 UWAL
Panicum dichotomiflorum Michaux
UNA00005017 Tuscaloosa 29 Aug 1975 Hoener, Fred K.
1274		 UNA
Panicum dichotomiflorum Michx. subsp. dichotomiflorum
UWAL0051864 Madison 04 Oct 2020 England, J. Kevin
11308		 UWAL
Panicum dichotomiflorum Michx.
JSU144432 Cleburne 23 Oct 1992 Hutchinson, Francine
1174		 JSU
Panicum dichotomiflorum Michaux
JSU100194 Morgan 15 Sep 1996 Spaulding, Daniel D.
9119		 JSU
Panicum dichotomiflorum Michaux
AUA000024454 Fayette 2 Oct 2004 SPAULDING, DANIEL D.
12193		 AUA
PANICUM DICHOTOMIFLORUM MICHX. VAR. DICHOTOMIFLORUM
UNA00005027 Mobile 01 Nov 1896 Mohr, Charles
s.n.		 UNA
Panicum dichotomiflorum Michx. subsp. dichotomiflorum
UWAL0010018 Winston 02 Oct 2010 Spaulding, Daniel D.
13284		 UWAL
Panicum dichotomiflorum Michx.
JSU100181 DeKalb 01 Sep 1982 Black, Randall
 JSU
Panicum dichotomiflorum Michaux
AUA000038111 Morgan 15 Aug 2015 ENGLAND, J. KEVIN
5596		 AUA
PANICUM DICHOTOMIFLORUM MICHX. VAR. DICHOTOMIFLORUM
AUA000018133 Lee 21 Sep 1962 ROGERS, KEN E.
 AUA
PANICUM DICHOTOMIFLORUM MICHX. SSP. DICHOTOMIFLORUM
UNA00005032 Mobile _ Aug 1882 Mohr, Charles
s.n.		 UNA
Panicum dichotomiflorum Michx. subsp. dichotomiflorum
JSU100119 Cleburne 15 Oct 1996 Hruska, Susan E.
1468		 JSU
Panicum dichotomiflorum Michaux
TROY000038976 Lowndes 27 Sep 2013 Diamond, Alvin R.
24591		 TROY
Panicum dichotomiflorum Michaux
JSU100187 Jefferson 17 Sep 1982 Whetstone, R. David
12481		 JSU
Panicum dichotomiflorum Michaux
UWAL0006270 Jefferson 22 Sep 1982 Kral, Robert
69559		 UWAL
Panicum dichotomiflorum Michx.
TROY000012384 Monroe 17 Sep 2007 Diamond, Alvin R.
18172		 TROY
Panicum dichotomiflorum Michaux
UWAL0009039 Autauga 18 Oct 2006 Spaulding, Daniel D.
12536		 UWAL
Panicum dichotomiflorum Michx. ssp. dichotomiflorum
TROY000036341 Bullock 20 Nov 2012 Dykes, Bailee
1469		 TROY
Panicum dichotomiflorum Michaux
UNA00065466 Fayette 02 Oct 2004 Spaulding, Daniel D.
12193		 UNA
Panicum dichotomiflorum Michx. subsp. dichotomiflorum
JSU100120 DeKalb 14 Oct 1975 Whetstone, R. David
7423		 JSU
Panicum dichotomiflorum Michaux
TROY000029533 Pike 12 Oct 2009 Diamond, Alvin R.
21059		 TROY
Panicum dichotomiflorum Michaux
ALNHS00000224 Mobile 31 May 1998 Spaulding, Daniel D.
10263		 ALNHS
Panicum dichotomiflorum Michx.
JSU100192 Marshall 28 Sep 1994 Spaulding, Daniel D.
6757		 JSU
Panicum dichotomiflorum Michaux
TROY000034738 Winston 02 Oct 2010 Spaulding, Daniel D.
13284		 TROY
Panicum dichotomiflorum Michaux
UWAL0009935 St. Clair 15 Oct 2010 Spaulding, Daniel D.
13292		 UWAL
Panicum dichotomiflorum Michx.
JSU100183 Etowah 18 Oct 1975 Whetstone, R. David
6867		 JSU
Panicum dichotomiflorum Michaux
JSU100182 Etowah 24 Sep 1994 Hodge, Lesley M.
3871		 JSU
Panicum dichotomiflorum Michaux
AUA000041235 Covington 21 Nov 2013 HANSEN, CURTIS J.
5867		 AUA
PANICUM DICHOTOMIFLORUM MICHX.
UWAL0043431 Baldwin 21 May 2007 Larsen, Harry S.
1602		 UWAL
Panicum dichotomiflorum Michx.
TROY000012381 Butler 21 Oct 2007 Diamond, Alvin R.
18554		 TROY
Panicum dichotomiflorum Michaux
SAMF0001321 Greene 28 Jul 2012 Davenport, Lawrence J.
5263		 SAMF
Panicum dichotomiflorum Michaux
JSU100184 Franklin 15 Oct 1975 Whetstone, R. David
7063		 JSU
Panicum dichotomiflorum Michaux
TROY000026811 Houston 25 Sep 2008 Diamond, Alvin R.
20107		 TROY
Panicum dichotomiflorum Michaux
UWAL0018234 Colbert 13 Sep 2014 England, J. Kevin
5156		 UWAL
Panicum dichotomiflorum Michaux
AUA000018129 Cleburne 11 Sep 1975 RUTLAND, DAVID W.
1586		 AUA
PANICUM DICHOTOMIFLORUM MICHX. SSP. DICHOTOMIFLORUM
UNA00005064 Wilcox 27 Sep 1978 Haynes, Robert R.
6974		 UNA
Panicum dichotomiflorum Michx. subsp. dichotomiflorum
AUA000018131 Jefferson 25 Sep 1977 SESSLER, ANN H.
1906		 AUA
PANICUM DICHOTOMIFLORUM MICHX. SSP. DICHOTOMIFLORUM
JSU144433 Cleburne 23 Oct 1992 Hutchinson, Francine
1173		 JSU
Panicum dichotomiflorum Michaux
AUA000018132 Lee 12 Oct 1972 ADKINS, F.W.
147		 AUA
PANICUM DICHOTOMIFLORUM MICHX. SSP. DICHOTOMIFLORUM
JSU105696 Shelby 11 Oct 1997 Spaulding, Daniel D.
10140		 JSU
Panicum dichotomiflorum Michaux
AUA000020095 Autauga 18 Oct 2006 SPAULDING, DANIEL D.
12536		 AUA
PANICUM DICHOTOMIFLORUM MICHX. SSP. DICHOTOMIFLORUM
UNA00045785 Houston 19 Sep 1992 MacDonald, John R.
5578		 UNA
Panicum dichotomiflorum Michx. subsp. dichotomiflorum
UWAL0011443 Greene 28 Jul 2012 Davenport, L.J.
5263		 UWAL
Panicum dichotomiflorum Michaux
UWAL0001721 Houston 22 Oct 2010 Diamond, Alvin R.
21673		 UWAL
Panicum dichotomiflorum Michx.
UNA00005047 Tuscaloosa 10 Oct 1961 Harper, Roland M.
4508		 UNA
Panicum dichotomiflorum Michx. subsp. dichotomiflorum
AUA000018134 Lee 6 Oct 1981 PATTERSON, MIKE
24		 AUA
PANICUM DICHOTOMIFLORUM MICHX. SSP. DICHOTOMIFLORUM
TROY000012383 Geneva 08 Nov 2007 Diamond, Alvin R.
18612		 TROY
Panicum dichotomiflorum Michaux
JSU156376 Lee 24 Aug 1993 Spaulding, Daniel D.
4503		 JSU
Panicum dichotomiflorum Michaux
TROY000027501 Fayette 02 Oct 2004 Spaulding, Daniel D.
12193		 TROY
Panicum dichotomiflorum Michaux var. dichotomiflorum
UWAL0012602 Tuscaloosa 07 Oct 2012 Spaulding, Daniel D.
13665		 UWAL
Panicum dichotomiflorum Michaux var. dichotomiflorum
JSU100188 Jefferson 17 Sep 1983 Whetstone, R. David
12462		 JSU
Panicum dichotomiflorum Michaux
UWAL0049916 Escambia 02 Sep 2019 Diamond, Alvin R.
29069		 UWAL
Panicum dichotomiflorum Michaux
TROY000012382 Butler 30 Sep 2006 Diamond, Alvin R.
16974		 TROY
Panicum dichotomiflorum Michaux var. dichotomiflorum
UWAL0032090 Houston 15 Oct 2015 Diamond, Alvin R.
26925		 UWAL
Panicum dichotomiflorum Michaux
AUA000018137 Pike 21 Oct 1994 DIAMOND, JR., ALVIN R.
9445		 AUA
PANICUM DICHOTOMIFLORUM MICHX. SSP. DICHOTOMIFLORUM
SAMF0007970 Butler 30 Sep 2006 Diamond. Alvin R.
16974		 SAMF
Panicum dichotomiflorum Michaux ssp. dichotomiflorum
JSU100185 Jackson 14 Oct 1975 Whetstone, R. David
7435		 JSU
Panicum dichotomiflorum Michaux
TROY000029661 Conecuh 24 Oct 2009 Diamond, Alvin R.
21095		 TROY
Panicum dichotomiflorum Michaux
UWAL0009040 Pike 12 Oct 2009 Diamond, Alvin R.
21059		 UWAL
Panicum dichotomiflorum Michx.
AUA000018138 Wilcox 30 Oct 1982 GUNN, SCOTT C.
1418		 AUA
PANICUM DICHOTOMIFLORUM MICHX. SSP. DICHOTOMIFLORUM
UNA00005057 Tuscaloosa 11 Oct 1977 Caldwell, Richard D.
19		 UNA
Panicum dichotomiflorum Michx. subsp. dichotomiflorum
AUA000018128 Choctaw 22 Jun 1994 CROUCH, VIRGINIA E.
1064		 AUA
PANICUM DICHOTOMIFLORUM MICHX. SSP. DICHOTOMIFLORUM
JSU100196 Talladega 02 Sep 1994 Ballard, J. Mark
 JSU
Panicum dichotomiflorum Michaux
TROY000044544 St. Clair 15 Oct 2010 Spaulding, Daniel D.
13292		 TROY
Panicum dichotomiflorum Michaux
JSU156373 Etowah 04 Sep 1995 Hodge-Spaulding, Lesley M.
4325		 JSU
Panicum dichotomiflorum Michaux
AUA000018130 Dallas 8 Sep 1976 SESSLER, ANN H.
551		 AUA
PANICUM DICHOTOMIFLORUM MICHX. SSP. DICHOTOMIFLORUM
JSU105695 Calhoun 05 Oct 1986 Lawler, Carol L.
1341		 JSU
Panicum dichotomiflorum Michaux
AUA000018135 Lee 27 Sep 1959 MOORE, WILLIAM H.
 AUA
PANICUM DICHOTOMIFLORUM MICHX. SSP. DICHOTOMIFLORUM
UWAL0009041 Conecuh 24 Oct 2009 Diamond, Alvin R.
21095		 UWAL
Panicum dichotomiflorum Michx.
JSU100190 Madison 15 Oct 1975 Whetstone, R. David
7547		 JSU
Panicum dichotomiflorum Michaux
TROY000045260 Autauga 13 Oct 2016 Parker, Matthew R.
225		 TROY
Panicum dichotomiflorum Michaux
JSU100195 Shelby 10 Sep 1982 Whetstone, R. David
12284		 JSU
Panicum dichotomiflorum Michaux
UWAL0032921 Morgan 15 Aug 2015 England, J. Kevin
5596		 UWAL
Panicum dichotomiflorum Michaux var. dichotomiflorum
UNA00005037 Tuscaloosa 30 Oct 1974 Hoener, Fred K.
1139		 UNA
Panicum dichotomiflorum Michx. subsp. dichotomiflorum
JSU100186 Jefferson 17 Oct 1975 Whetstone, R. David
7172		 JSU
Panicum dichotomiflorum Michaux
JSU100193 Morgan 15 Sep 1996 Spaulding, Daniel D.
9152		 JSU
Panicum dichotomiflorum Michaux
UNA00005042 Chilton 15 Sep 1979 Wiersema, John H.
1287		 UNA
Panicum dichotomiflorum Michx. subsp. dichotomiflorum
UWAL0045563 Bullock 28 Sep 2017 Horne, Howard E.
4239		 UWAL
Panicum dichotomiflorum Michaux
JSU100118 Bibb 25 Sep 1998 Brodeur, Kristin R.
1453		 JSU
Panicum dichotomiflorum Michaux
AUA000018136 Macon 1 Nov 1971 HUDSON, MARY
28		 AUA
PANICUM DICHOTOMIFLORUM MICHX. SSP. DICHOTOMIFLORUM
UWAL0046544 Autauga 13 Oct 2016 Parker, Matthew R.
225		 UWAL
Panicum dichotomiflorum Michaux
UWAL0057703 Cleburne 03 Oct 2020 Spaulding, Daniel D.
16508		 UWAL
Panicum dichotomiflorum Michx.
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