Alternanthera sessilis

Family:AMARANTHACEAE
Species:Alternanthera sessilis (Linnaeus) R. Brown ex A.P. de Candolle
Common Name:Sessile Joyweed
Habitat:Sand bars, creek banks.
Associated Ecological Communities:**
Growth Habit:Herb
Duration:Annual
Category:Vascular
USDA Symbol:ALSE4
Plant Notes:Sessile Joyweed is an introduced annual or perennial herb in the Amaranth family (Amaranthaceae). It is native to Asia, but is now widespread in Africa, Central and South America. In Alabama it has been found in the southern half of the state. Sessile Joyweed occurs on sand bars, on river banks, in roadside ditches, and in disturbed wetlands. Several stems branched from near the base arise from a tap root. The stems are procumbent or sprawling, green in color, and angled. They often root at the nodes. The stems are pubescent in lines. Leaves are opposite, sessile, glabrous, elliptic to oblanceolate in outline with entire margins. Flowers are produced in sessile, axillary heads. The flowers are surrounded by papery white tepals. The fruit is an utricle. Sessile Joyweed is sometimes used as an aquarium plant, and young shoots and leaves are eaten as a vegetable in Southeast Asia. It is listed as a noxious weed on the USDA Federal Noxious Weed List, and is listed as a Class A Noxious Weed by the Alabama Department of Agriculture and Industries. A member of the Federal Noxious Weed List (24 May 2006).--A. Diamond
Taxonomic Notes:**
Status:Not Native, FACU (NWI)
References:**
Specimen: View specimen details in the Alabama Herbarium Consortium Specimen Database

** Not applicable or data not available.

Classification

FamilyAMARANTHACEAE - Amaranth family
Genus Alternanthera
Species Alternanthera sessilis (Linnaeus) R. Brown ex A.P. de Candolle - Sessile Joyweed

Citation

Citation ALTERNANTHERA SESSILIS (Linnaeus) R. Brown ex de Candolle, Cat. Pl. Horti Monsp. 4, 77. 1813.
Basionym: Gomphrena sessilis Linnaeus 1753.
Type: Without data, Hermann s.n. (lectotype: BM-Herb. Sloane 2: 9). Lectotypified by Mears, Taxon 29: 89. 1980.

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Achyranthes linearifolia Kongl. Vetensk. Acad. Handl. 1825: 428. 1828.  
Achyranthes triandra Fl. Ind. 2: 505. 1824, nom. illegit.Gomphrena sessilis Linnaeus 1753. 
Achyranthes villosa Fl. Filip. 189. 1837.  
Allaganthera forskalii Pl. Hort. Erlang. 69. 1814, nom. illegit.Gomphrena sessilis Linnaeus 1753. 
Alternanthera angustifolia var. typica Biblio. Bot. 89: 640. 1921, nom. inadmiss.Alternanthera angustifolia R. Brown 1810. 
Alternanthera denticulata var. major de Candolle, Prodr. 13(2): 356. 1849. GUINEA: Without data, Beauvois s.n. (holotype: P).
Alternanthera denticulata var. micrantha Fl. Austral. 5: 250. 1870. AUSTRALIA: Northern Territory: Arnhem's Land, s.d., Mueller s.n. (holotype: ?).
Alternanthera denticulata var. typica Biblio. Bot. 86: 640. 1921, nom. inadmiss.Alternanthera denticulata R. Brown 1810. 
Alternanthera major Biblioth. Bot. 89: 640. 1921.Alternanthera nana R. Brown, var. major Bentham 1870. 
Alternanthera micrantha Biblio. Bot. 89: 640. 1921.Alternanthera denticulata R.Br., var. micrantha Benth. 
Alternanthera prostrata Prodr. Fl. Nepal. 76. 1825. NEPAL:
Alternanthera tenuissima Bot. Arch. 39: 382. 1939. NEW GUINEA: Without data, Clemens 6339 (holotype: GH).
Alternanthera achyranthes Fl. Aegypt.-Arab. lix, 28. 1775. Without data, Forsskål s.n. (holotype: C).
Alternanthera angustifolia Prodr. 417. 1810. AUSTRALIA: Without data, Brown s.n. (holotype: BM).
Alternanthera angustifolia var. lanata Fl. Austral. 5: 251. 1870. AUSTRALIA: Northern Territory: Arnhems Land, s.d., Mueller s.n. (holotype: ?).
Alternanthera angustifolia var. macrocephala Biblio. Bot. 89: 640. 1921. AUSTRALIA: Queensland: Flinders River, 1910, Domin II (holotype: ?).
Alternanthera decipiens Fl. Austral. 5: 251. 1870. AUSTRALIA: Queensland: Without data, Mitchell s.n. (holotype: BM; isotype: GH).
Alternanthera denticulata Prodr. 417. 1810. AUSTRALIA: Without data, Brown s.n. (holotype: BM).
Alternanthera denticulata var. uliginosa Biblio. Bot. 89: 640. 1921. AUSTRALIA: Queensland: Without data, 1910, Domin s.n. (holotype: ?).
Alternanthera nana Prodr. 417. 1810. AUSTRALIA: Without data, Brown 3064 (holotype: BM).
Alternanthera nana var. major Fl. Austral. 5: 250. 1870. AUSTRALIA: Queensland: Rockhampton, s.d., O'Shanesy s.n. (holotype: ?).
Alternanthera nodiflora Prodr. 417. 1810. AUSTRALIA: Without data, Brown s.n. (holotype: BM; isotypes: GH, P).
Alternanthera nodiflora var. lanceolata de Candolle, Prodr. 13(2): 356. 1849.  
Alternanthera nodiflora var. linearifolia de Candolle, Prodr. 13(2): 356. 1849. AUSTRALIA: Without data, Verreaux s.n. (lectotype: P). Lectotypified by Mears, Proc. Acad. Nat. Sci. Philadelphia 129: 5. 1977.
Alternanthera sennii Boll. Reale Orto Bot. Giardino Colon. Palermo 9: 21. 1910. "Beni-Amer", Senn 552 (holotype: ?).
Alternanthera sessilis forma lanceolata Revis. Gen. Pl. 2: 540. 1891.Alternanthera sessilis (Linnaeus) R. Brown ex de Candolle, var. parviflora Kuntze 1891. 
Alternanthera sessilis forma spathulifolia Revis. Gen. Pl. 2: 540. 1891. INDONESIA: Buitenzorg, s.d., Kuntze 4270 (lectotype: NY). Lecto- typified by Mears, Proc. Acad. Nat. Sci. Philadelphia 129: 5. 1977.
Alternanthera sessilis forma spathulifolia Revis. Gen. Pl. 2: 540. 1891, non Kuntze 1891.  
Alternanthera sessilis var. neglecta Revis. Gen. Pl. 2: 540. 1891.  
Alternanthera sessilis var. nodiflora Revis. Gen. Pl. 2: 540. 1891.Alternanthera nodiflora R. Brown 1810. 
Alternanthera sessilis var. tenuissima Fl. Males., ser. 1. 4(2): 93. 1949.Alternanthera tenuissima Suessenguth 1939. 
Alternanthera sessilis forma lanceolata Revis. Gen. Pl. 2: 540. 1891, non Kuntze 1891. "Plabuan", 16 Jan 1875, Kuntze 5085 (holotype: NY).
Alternanthera sessilis forma lanceolata Revis. Gen. Pl. 2: 540. 1891, non Kuntze 1891, nec Kuntze 1891. BURMA: Without data, Kuntze 1246 (holotype: NY).
Alternanthera sessilis var. denticulata Revis. Gen. Pl. 2: 540. 1891.Alternanthera denticulata R. Brown 1810. 
Alternanthera sessilis var. major de Candolle, Prodr. 13(2): 357. 1849.  
Alternanthera sessilis var. parviflora Revis. Gen. Pl. 2: 540. 1891. VIETNAM: Saigon, s.d., Kuntze 3960 (holotype: NY).
Alternanthera sessilis var. stauntonii de Candolle, Prodr. 13(2): 357. 1849. CHINA: Without data, Staunton s.n. (holotype: G).
Alternanthera sibirica Nomencl. Bot., ed. 2. 1: 65. 1840.Illecebrum sibiricum de Vest ex Schultes 1820. 
Alternanthera triandra Encycl. 1: 95. 1783, nom. illegit.Alternanthera achyranthes Forsskål 1775. 
Alternanthera uliginosa Repert. Spec. Nov. Regni Veg. Beih. 53: 118. 1928.Alternanthera sessilis (Linnaeus) R. Brown ex de Candolle, var. uliginosa Domin 1921. 
Gomphrena sessilis Sp. Pl. 225. 1753. Without data, Hermann s.n. (lectotype: BM-Herb. Sloane 2: 9). Lectotypified by Mears, Taxon 29: 89. 1980.
Illecebrum angustifolium Syst. Veg. 1: 818. 1824 ("1825").Alternanthera angustifolia R. Brown 1810. 
Illecebrum denticulatum Syst. Veg. 1: 820. 1824 ("1825").Alternanthera denticulata R. Brown 1810. 
Illecebrum nanum Syst. Veg. 1: 819. 1824 ("1825").Alternanthera nana R. Brown 1810. 
Illecebrum sessile Sp. Pl., ed. 2. 300. 1762.Gomphrena sessilis Linnaeus 1753. 
Illecebrum sibiricum Roemer & Schultes, Syst. Veg. 5: 516. 1820. Without data, Pallas s.n. (holotype: BM).
Illecebrum triandrum Fragm. Pl. Filip. 43. 1851, nom. illegit.Achyranthes villosa Blanco 1837. 
Paronychia sessilis Tabl. Ecole Bot. 44. 1804.Gomphrena sessilis Linnaeus 1753. 
Paronychia tetragona Methodus 315. 1794, nom. illegit.Gomphrena sessilis Linnaeus 1753. 
Steiremis repens Fl. Tellur. 3: 41. 1837 ("1836"), nom. illegit.Gomphrena polygonoides Linnaeus 1753. 

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: Baldwin, Covington, Elmore, Escambia, Geneva, Houston, Mobile, Pike

Counties represented by specimen data listed below:

Herbaria represented by specimen data listed below: AMAL, NY, TROY, UNA, UWAL, UWFP

Range of years during which specimens were collected: -

Barcode / Accession No. County Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
Image
UWAL0042836 Baldwin 26 Oct 2006 Larsen, H.S.
1579
UWAL
Alternanthera sessilis (L.) R. Br. ex DC.
AMAL00004315 Baldwin 12 Sep 2012 T. Wayne Barger
749
AMAL
Alternanthera sessilis (Linnaeus) R. Brown ex A.P. de Candolle
TROY000041187 Elmore 17 Aug 2011 Robert Pullen
208
TROY
Alternanthera sessilis (Linnaeus) R. Brown ex A.P. de Candolle
TROY000043315 Geneva 16 Nov 2014 Alvin R. Diamond
25677
TROY
Alternanthera sessilis (Linnaeus) R. Brown ex A.P. de Candolle
NYv-096-00348273 Houston 16 Jun 1997 John R. MacDonald
10707
NY
Alternanthera sessilis (Linnaeus) R. Brown ex A.P. de Candolle
TROY000044214 Pike 21 Jul 2016 Alvin R. Diamond
27571
TROY
Alternanthera sessilis (Linnaeus) R. Brown ex A.P. de Candolle
TROY000044329 Houston 25 Nov 2016 Alvin R. Diamond
27732
TROY
Alternanthera sessilis (Linnaeus) R. Brown ex A.P. de Candolle
UWFP001772 Escambia 07 Aug 2004 James R. Burkhalter
19970
UWFP
Alternanthera sessilis (Linnaeus) R. Brown ex A.P. de Candolle
TROY000000810 Covington 17 Jun 2002 Alvin R. Diamond
13326
TROY
Alternanthera sessilis (Linnaeus) R. Brown ex A.P. de Candolle
UWAL0038173 Mobile 16 Apr 1975 LeLong, Michel G.
8328
UWAL
Alternanthera sessilis (L.) R. Brown ex A.P. de Candolle
TROY000000811 Covington 17 Jun 2002 Alvin R. Diamond
13359
TROY
Alternanthera sessilis (Linnaeus) R. Brown ex A.P. de Candolle
UWFP001773 Escambia 31 Oct 1999 James R. Burkhalter
16932
UWFP
Alternanthera sessilis (Linnaeus) R. Brown ex A.P. de Candolle
UWAL0039305 Pike 22 Jul 2016 Diamond, Alvin R.
27571
UWAL
Alternanthera sessilis (Linnaeus) R. Brown ex A.P. de Candolle
UWAL0033177 Geneva 16 Nov 2014 Diamond, Alvin R.
25677
UWAL
Alternanthera sessilis (Linnaeus) R. Brown ex A.P. de Candolle
AMAL00005583 Houston 16 Jun 1997 John R. MacDonald
10707
AMAL
Alternanthera sessilis (Linnaeus) R. Brown ex A.P. de Candolle
UWAL0002409 Baldwin 10 Jun 2008 Spaulding, Daniel D.
12950
UWAL
Alternanthera sessilis (L.) R. Br. Ex DC.
UNA00057110 Houston 16 Jun 1997 John R. MacDonald
10707
UNA
Alternanthera sessilis (L.) R. Br. ex DC.
UWAL0042837 Baldwin 16 Apr 2010 Larsen, H.S.
1723
UWAL
Alternanthera sessilis (L.) R. Br. ex DC.
AMAL00002004 Baldwin 10 Jun 2008 Daniel D. Spaulding
12950
AMAL
Alternanthera sessilis (Linnaeus) R. Brown ex A.P. de Candolle
UNA00047105 Houston 16 Jun 1997 John R. MacDonald
10707
UNA
Alternanthera sessilis (L.) R. Br. ex DC.
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